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Drogheda/03-Architecture-Hardware/circuitikz-wiring/Drogheda_Diagrama-Unico-Proto.tex

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% Drogheda_Diagrama-Unico-Proto.tex — UN solo diagrama de conexiones del protoboard
% HBOX Watchdog v3 (DEV) · bloques 1–11 en una sola hoja, todos los símbolos.
% Fuente de verdad: watchdog-electrical-design-state.md §2 + Guía v3.0 (Bloques 1–11).
% Autocontenido: pdflatex Drogheda_Diagrama-Unico-Proto.tex
\documentclass[border=14pt]{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{circuitikz}
\usepackage{helvet}\renewcommand{\familydefault}{\sfdefault}
\usetikzlibrary{calc,arrows.meta}
\definecolor{net5V}{HTML}{C62828}
\definecolor{net3V3}{HTML}{EF6C00}
\definecolor{netGND}{HTML}{212121}
\definecolor{netSig}{HTML}{1565C0}
\definecolor{netAna}{HTML}{2E7D32}
\definecolor{netIgn}{HTML}{800020}
\definecolor{Indigo}{HTML}{2C3C5B}
\ctikzset{bipoles/length=0.75cm, font=\footnotesize}
\newcommand{\flagg}[4]{\node[circle,fill=#1,text=white,inner sep=1.6pt,font=\bfseries\tiny] (#2) at (#3) {#4};}
\newcommand{\ant}[2]{\draw (#1,#2) -- ++(0,0.34) -- ++(-0.18,0.22); \draw (#1,#2) ++(0,0.34) -- ++(0.18,0.22);}
\newcommand{\bnum}[2]{\node[circle,draw=Indigo,text=Indigo,inner sep=1.2pt,font=\bfseries\tiny] at (#1) {#2};}
% pinout strip helpers
\definecolor{cafe}{HTML}{8B4513}
\definecolor{dorado}{HTML}{DAA520}
\newcommand{\csq}[1]{\fcolorbox{black!45}{#1}{\phantom{\rule{0.12cm}{0.12cm}}}}
\begin{document}
\begin{tikzpicture}[every node/.append style={font=\footnotesize}]
% ================= TITULO + LEYENDA =================
\node[anchor=north west,font=\bfseries\large,Indigo] at (-20.4,13.6)
{HBOX Watchdog v3 — Diagrama ÚNICO de conexiones del protoboard (bloques 1–11)};
\node[anchor=north west,font=\scriptsize,gray] at (-20.4,12.9)
{Todo el sistema en una hoja, para verificación rápida · Modo B dibujado (Modo A: ver Avisos) · pinouts de componentes abajo · Proyecto Drogheda / Helgen · v1.2 · 2026-07-20};
\begin{scope}[shift={(-20.4,12.1)}]
\foreach \i/\c/\t in {0/net5V/{5 V},1.6/net3V3/{3.3 V},3.2/netGND/GND,4.6/netSig/{Señal},6.2/netAna/{Analógico},8.6/netIgn/{Ign. / 24 V}}{
\draw[\c,line width=2pt] (\i,0)--(\i+0.45,0); \node[anchor=west,font=\scriptsize] at (\i+0.5,0){\t};}
\node[anchor=west,font=\scriptsize] at (11.6,0){$\bullet$ = unión · cruce sin punto = NO se conectan · SAL/3V3/VEH: misma red donde se repite la etiqueta};
\end{scope}
% ================= RIEL MAIN5V =================
\draw[net5V,line width=1.2pt] (-8.6,10.6) -- (23.0,10.6);
\node[net5V,font=\bfseries,anchor=south west] at (-8.6,10.65){MAIN5V};
\node[net5V,font=\bfseries,anchor=south east] at (23.0,10.65){MAIN5V};
\bnum{-9.0,10.6}{1}
% cap de reserva del riel
\fill[net5V] (-7.4,10.6) circle(1.4pt);
\draw (-7.4,10.6) to[C,l=$100\,\mu$F$+$100 nF] (-7.4,9.1) node[ground]{};
% ================= MCU BLACKPILL =================
\node[draw,fill=blue!8,rounded corners,inner sep=0] (MCU) at (2.3,0.9) [minimum width=4.6cm,minimum height=13cm]{};
\node[font=\bfseries\small,Indigo,rotate=90] at (2.3,2.6){Blackpill STM32F411 (WeAct)};
\node[font=\tiny,gray,rotate=90] at (2.9,2.6){3V3 = salida del regulador del módulo};
% --- pin 5V (borde superior) ---
\draw[net5V,line width=1pt] (1.6,7.4) -- (1.6,10.6); \fill[net5V] (1.6,10.6) circle(1.4pt);
\node[font=\bfseries\tiny,anchor=north] at (1.6,7.3){5V};
% --- GND (borde inferior) ---
\draw[netGND,line width=1pt] (0.8,-5.6) -- (0.8,-6.1) node[ground]{};
\node[font=\bfseries\tiny,anchor=south] at (0.8,-5.5){GND};
% --- 3V3 (borde izq) ---
\draw[net3V3,line width=1pt] (0,6.6) -- (-0.9,6.6); \flagg{net3V3}{f3a}{-1.15,6.6}{3V3}
\node[font=\bfseries\tiny,anchor=west] at (0.05,6.6){3V3};
% --- pines izquierda ---
\foreach \y/\nm in {4.4/PA0,3.2/PA4,1.8/PA5,0.0/PA7,-1.6/PB1,-3.0/PA8,-4.8/NRST}{
\node[font=\bfseries\tiny,anchor=west] at (0.05,\y){\nm};}
% --- pines derecha ---
\foreach \y/\nm in {6.6/PA1,5.6/PA2,5.0/PA3,4.2/PA10,3.4/PA9,2.2/PB6,1.6/PB7,0.4/PB0,-1.2/PA6}{
\node[font=\bfseries\tiny,anchor=east] at (4.55,\y){\nm};}
% --- pines borde inferior (gauge) ---
\foreach \x/\nm in {1.8/PB12,2.6/PB13,3.4/PB14,4.2/PB15}{
\node[font=\bfseries\tiny,anchor=south,rotate=90] at (\x,-5.45){\nm};}
% ================= BLOQUE 10 · FUENTE + RESPALDO (izquierda arriba) =================
\bnum{-19.0,9.7}{10}
\node[draw,rounded corners,minimum width=2.3cm,minimum height=1.5cm,align=center,font=\scriptsize] (SRC) at (-18.0,8.6){Fuente 5 V\\«vehículo»\\SD-15B-05 / banco};
\draw[netGND] (-18.0,7.85) -- (-18.0,7.4) node[ground]{};
% fila VEH -> D1 -> SYS -> corte -> riel
\draw[net5V,line width=1pt] (-16.8,8.6) -- (-15.0,8.6);
\node[net5V,font=\bfseries\tiny,anchor=south] at (-16.1,8.65){VEH 5V};
\draw[net5V] (-15.0,8.6) to[D,l={\tiny 1N5819}] (-13.2,8.6);
\draw[net5V,line width=1pt] (-13.2,8.6) -- (-10.6,8.6);
\fill[net5V] (-10.6,8.6) circle(1.5pt);
\node[net5V,font=\bfseries\tiny,anchor=south] at (-10.6,8.72){nodo SYS};
\draw[net5V,line width=1pt] (-10.6,8.6) -- (-10.0,8.6);
\draw[net5V] (-10.0,8.6) to[nos] (-9.0,8.6);
\node[font=\tiny,anchor=south,align=center] at (-9.5,9.0){apagador de\\corte (SPST)};
\draw[net5V,line width=1.2pt] (-9.0,8.6) -- (-8.6,8.6) -- (-8.6,10.6);
% --- compuerta de carga CHRG_RUN (PA8) ---
\node[pmos,anchor=gate] (MC) at (-16.4,6.0){};
\node[font=\tiny,anchor=west,align=left] at (-15.5,6.0){IRF9540N (P)};
\node[font=\tiny,gray,anchor=south west] at ($(MC.source)+(0.06,0.0)$){S};
\node[font=\tiny,gray,anchor=north west] at ($(MC.drain)+(0.06,0.0)$){D};
\node[font=\tiny,gray,anchor=south] at ($(MC.gate)+(0.18,0.08)$){G};
\draw[net5V,line width=0.9pt] (MC.source) -- (MC.source |- 0,8.6);
\fill[net5V] (MC.source |- 0,8.6) circle(1.4pt);
\draw[netSig] (MC.gate) -- (-17.6,6.0); \fill (-17.6,6.0) circle(1.3pt);
\draw (-17.6,6.0) to[R,l=$10$k] (-17.6,7.4);
\draw (-17.6,7.4) -- (MC.source |- 0,7.4); \fill (MC.source |- 0,7.4) circle(1.3pt);
\node[npn,anchor=collector] (QC) at (-17.6,5.3){};
\node[font=\tiny,anchor=west] at (-17.25,4.75){2N3904};
\node[font=\tiny,gray,anchor=south west] at ($(QC.collector)+(0.05,0.0)$){C};
\node[font=\tiny,gray,anchor=north west] at ($(QC.emitter)+(0.05,0.0)$){E};
\node[font=\tiny,gray,anchor=south] at ($(QC.base)+(0.14,0.08)$){B};
\draw[netSig] (QC.collector) -- (-17.6,6.0);
\draw[netSig] (QC.base) to[R,l_=$1$k] (-20.2,4.75 |- QC.base);
\draw[netGND] (QC.emitter) -- ++(0,-0.35) node[ground]{};
\node[font=\tiny,Indigo,align=left,anchor=west] at (-20.2,3.05){\textbf{CHRG\_RUN (PA8):} ALTO = carga\\MCU ausente = SIN carga (inverso al PCB)};
% --- TP4056 ---
\node[draw,rounded corners,fill=blue!6,minimum width=1.8cm,minimum height=1.2cm,font=\tiny,align=center] (TP) at (-15.5,3.8){TP4056\\cargador};
\draw[net5V,line width=0.9pt] (MC.drain) -- (MC.drain |- 0,4.4);
\node[font=\tiny,anchor=south west] at (-15.55,4.42){IN$+$};
\draw[netGND] (-16.4,3.8) -- (-16.9,3.8) -- (-16.9,3.4) node[ground]{};
\node[font=\tiny,anchor=west] at (-16.38,3.58){IN$-$};
% B+ hacia bus
\draw[net5V,line width=0.9pt] (-15.2,3.2) -- (-15.2,2.6);
\node[font=\tiny,anchor=north west] at (-15.18,3.2){B$+$};
\node[font=\tiny,gray,align=left,anchor=north west] at (-16.6,2.0){NTC del kit: SIN USAR\\(módulo sin pin TEMP;\\en PCB $\rightarrow$ LTC4040)};
% --- bus BAT+ ---
\draw[net5V,line width=1pt] (-15.2,2.6) -- (-9.1,2.6);
\node[net5V,font=\bfseries\tiny,anchor=south] at (-12.6,2.65){BAT$+$};
% bateria
\fill[net5V] (-13.6,2.6) circle(1.4pt);
\draw (-13.6,2.6) to[battery1] (-13.6,0.8);
\draw[netGND] (-13.6,0.8) -- (-13.6,0.55) node[ground]{};
\node[font=\tiny,anchor=west,align=left] at (-13.35,1.6){18650 1S4P\\$\sim$12 Ah};
% --- MT3608 ---
\node[draw,rounded corners,fill=blue!6,minimum width=1.9cm,minimum height=1.2cm,font=\tiny,align=center] (MT) at (-10.9,3.8){MT3608\\elevador $\rightarrow$5 V};
\fill[net5V] (-11.4,2.6) circle(1.4pt);
\draw[net5V,line width=0.9pt] (-11.4,2.6) -- (-11.4,3.2);
\node[font=\tiny,anchor=south west] at (-11.38,3.22){IN$+$};
\draw[netGND] (-11.85,3.8) -- (-12.35,3.8) -- (-12.35,3.35) node[ground]{};
\draw[net5V,line width=0.9pt] (-10.6,4.4) -- (-10.6,5.2);
\draw[net5V] (-10.6,5.2) to[D,l={\tiny 1N5819}] (-10.6,6.6);
\draw[net5V,line width=0.9pt] (-10.6,6.6) -- (-10.6,8.6);
\node[font=\tiny,anchor=west] at (-10.35,5.9){aj. $<$ 5 V veh.};
% ================= BLOQUE 4 · SENSADO =================
\bnum{-9.0,6.4}{4}
% PA0 (BAT_SENSE): bus -> riser -> divisor vertical en x=-2.8
\fill[net5V] (-9.1,2.6) circle(1.4pt);
\draw[netAna,line width=0.9pt] (-9.1,2.6) -- (-9.1,6.0) -- (-2.8,6.0);
\node[netAna,font=\tiny,anchor=south] at (-6.2,6.05){BAT\_SENSE ($\div$2)};
\draw (-2.8,6.0) to[R,l=$10$k] (-2.8,4.4);
\fill (-2.8,4.4) circle(1.4pt);
\draw (-2.8,4.4) to[R,l=$10$k] (-2.8,3.0);
\draw[netGND] (-2.8,3.0) -- (-2.8,2.7) node[ground]{};
\draw[netAna,line width=0.9pt] (-2.8,4.4) -- (0,4.4);
% PA4 (5V_SENSE): divisor vertical en x=-6.0
\flagg{net5V}{fveh}{-6.0,4.9}{VEH}
\draw (-6.0,4.7) to[R,l_=$10$k] (-6.0,3.2);
\fill (-6.0,3.2) circle(1.4pt);
\draw (-6.0,3.2) to[R,l_=$10$k] (-6.0,1.7);
\draw[netGND] (-6.0,1.7) -- (-6.0,1.45) node[ground]{};
\draw[netAna,line width=0.9pt] (-6.0,3.2) -- (0,3.2);
\node[netAna,font=\tiny,anchor=south] at (-4.0,3.25){5V\_SENSE ($\div$2)};
% PA5 (ignicion): DFR1015
\node[netIgn,font=\bfseries\tiny,align=right,anchor=east] at (-8.8,2.0){Ignición\\12--24 V\\(GX16 p3)};
\draw[netIgn,line width=1pt] (-8.75,2.0) -- (-8.2,2.0);
\node[draw,rounded corners,minimum width=1.6cm,minimum height=1.2cm,font=\tiny,align=center] (DFR) at (-7.4,1.8){DFR1015\\$\rightarrow$ 5 V};
\node[font=\tiny,anchor=south west] at (-8.18,2.02){IN$+$};
\draw[netGND] (-8.2,1.4) -- (-8.5,1.4) -- (-8.5,1.0) node[ground]{};
\draw[net5V,line width=0.9pt] (-6.6,1.8) -- (-5.6,1.8);
\draw (-5.6,1.8) to[R,l=$100\,\Omega$] (-3.9,1.8);
\draw[netGND] (-6.6,1.4) -- (-6.35,1.4) -- (-6.35,1.0) node[ground]{};
\draw[netSig,line width=0.9pt] (-3.9,1.8) -- (0,1.8);
\fill (-3.1,1.8) circle(1.3pt); \fill (-2.2,1.8) circle(1.3pt);
% clamp BAT54 hacia 3V3 (dibujado hacia abajo; cátodo en 3V3)
\draw (-3.1,1.8) to[D] (-3.1,0.85);% ánodo en PA5, cátodo hacia 3V3 (clamp Schottky)
\flagg{net3V3}{f3c}{-3.1,0.55}{3V3}
\node[font=\tiny,anchor=east,align=right] at (-3.35,1.05){1N5819\\\textcolor{gray}{(PCB: BAT54)}};
\draw (-2.2,1.8) to[C,l=100 nF] (-2.2,0.9);
\draw[netGND] (-2.2,0.9) -- (-2.2,0.7) node[ground]{};
\node[font=\tiny,gray,anchor=north west,align=left] at (-8.8,0.55){banco: apagador 3V3$\rightarrow$PA5\\simula la ignición (sin DFR1015)};
\node[font=\tiny,netSig,anchor=south] at (-1.1,1.85){digital, sin divisor};
% ================= BLOQUE 11 · LM35 (PA7) + NTC (PB1) =================
\bnum{-7.6,-0.35}{11}
\node[draw,rounded corners,minimum width=1.4cm,minimum height=1.5cm,font=\bfseries\scriptsize,align=center] (LM) at (-5.9,-1.25){LM35};
\node[font=\tiny,anchor=north] at (-5.9,-1.5){TO-92};
\draw[netAna,line width=0.9pt] (-5.9,-0.5) -- (-5.9,0.0) -- (0,0.0);
\node[font=\tiny,anchor=west] at (-5.8,-0.22){OUT};
\node[netAna,font=\tiny,anchor=south] at (-1.6,0.08){10 mV/°C · aire/tarjeta};
\draw[net5V,line width=0.9pt] (-6.6,-0.8) -- (-7.4,-0.8);
\node[net5V,font=\bfseries\tiny,anchor=south east] at (-7.05,-0.7){MAIN5V};
\fill[net5V] (-7.4,-0.8) circle(1.2pt);
\draw (-7.4,-0.8) to[C,l_=100 nF] (-7.4,-1.7);
\draw[netGND] (-7.4,-1.7) -- (-7.4,-1.9) node[ground]{};
\draw[netGND] (-5.9,-2.0) -- (-5.9,-2.35) node[ground]{};
% NTC -> PB1 (columna x=-3.3)
\flagg{net3V3}{f3d}{-3.3,-0.45}{3V3}
\draw (-3.3,-0.65) to[R,l=$10$k 1\%] (-3.3,-1.6);
\fill (-3.3,-1.6) circle(1.4pt);
\draw (-3.3,-1.6) to[thR,l=NTC $10$k] (-3.3,-2.8);
\draw[netGND] (-3.3,-2.8) -- (-3.3,-3.0) node[ground]{};
\draw[netAna,line width=0.9pt] (-3.3,-1.6) -- (0,-1.6);
\node[netAna,font=\tiny,anchor=south] at (-1.55,-1.5){al punto caliente (celda/módem)};
\draw (-3.3,-1.6) -- (-4.3,-1.6); \draw (-4.3,-1.6) to[C] (-4.3,-2.6);
\node[font=\tiny,anchor=east] at (-4.45,-2.1){100 nF};
\draw[netGND] (-4.3,-2.6) -- (-4.3,-2.8) node[ground]{};
% ================= PA8 (ruta larga a la compuerta de carga) =================
\draw[netSig,line width=0.9pt] (0,-3.0) -- (-1.3,-3.0) -- (-1.3,-3.4) -- (-20.2,-3.4) -- (-20.2,4.75 |- QC.base);
\node[netSig,font=\tiny,anchor=south] at (-11.0,-3.35){PA8 = CHRG\_RUN $\rightarrow$ compuerta de carga (Bloque 10)};
% ================= BLOQUE 7 · RESET + GAUGE =================
\bnum{-3.5,-4.3}{7}
\draw[netSig,line width=0.9pt] (0,-4.8) -- (-1.2,-4.8);
\draw (-1.2,-4.8) to[push button] (-2.6,-4.8);
\draw[netGND] (-2.6,-4.8) -- (-2.6,-5.3) node[ground]{};
\node[font=\tiny,anchor=north,align=center] at (-1.9,-5.35){reset $\rightarrow$ GND};
% gauge x4
\foreach \x in {1.8,2.6,3.4,4.2}{
\draw[netSig,line width=0.8pt] (\x,-5.6) -- (\x,-6.0);
\draw (\x,-6.0) to[R] (\x,-7.3);
\draw (\x,-7.3) to[leD] (\x,-8.4);
\draw[netGND] (\x,-8.4) -- (\x,-8.6) node[ground]{};}
\node[font=\tiny,anchor=east] at (1.7,-6.65){$330\,\Omega$};
\node[font=\tiny,anchor=north,align=center] at (3.0,-8.9){gauge de batería $\times$4 · quedan APAGADOS hasta firmware};
% ================= BLOQUE 3 · INTERRUPTOR DE CARGA (PA1 -> SAL) =================
\bnum{5.4,7.3}{3}
\draw[netSig,line width=0.9pt] (4.6,6.6) -- (5.1,6.6);
\draw (5.1,6.6) to[R,l=$1$k] (7.1,6.6);
\node[npn,anchor=base] (Q1) at (7.6,6.6){};
\node[font=\tiny,anchor=west] at (8.5,6.3){2N3904};
\node[font=\tiny,gray,anchor=south west] at ($(Q1.collector)+(0.05,0.0)$){C};
\node[font=\tiny,gray,anchor=north west] at ($(Q1.emitter)+(0.05,0.0)$){E};
\node[font=\tiny,gray,anchor=south] at ($(Q1.base)+(0.14,0.08)$){B};
\draw[netSig] (7.1,6.6) -- (Q1.base);
\draw[netGND] (Q1.emitter) -- ++(0,-0.35) node[ground]{};
\draw[netSig] (Q1.collector) -- (Q1.collector |- 0,8.4); \fill (Q1.collector |- 0,8.4) circle(1.4pt);
\draw (Q1.collector |- 0,8.4) to[R,l=$10$k] (Q1.collector |- 0,10.6);
\fill[net5V] (Q1.collector |- 0,10.6) circle(1.4pt);
\node[pmos,anchor=gate] (M1) at (9.9,8.4){};
\node[font=\tiny,anchor=south,align=center] at (10.6,9.35){IRF9540N (P)};
\node[font=\tiny,gray,anchor=south west] at ($(M1.source)+(0.06,0.0)$){S};
\node[font=\tiny,gray,anchor=north west] at ($(M1.drain)+(0.06,0.0)$){D};
\node[font=\tiny,gray,anchor=south] at ($(M1.gate)+(0.18,0.08)$){G};
\draw[netSig] (Q1.collector |- 0,8.4) -- (M1.gate);
\draw[net5V,line width=0.9pt] (M1.source) -- (M1.source |- 0,10.6);
\fill[net5V] (M1.source |- 0,10.6) circle(1.4pt);
\draw[net5V,line width=1pt] (M1.drain) -- (M1.drain |- 0,7.6);
\coordinate (SALn) at (M1.drain |- 0,7.6);
\fill[net5V] (SALn) circle(1.5pt);
\node[net5V,font=\bfseries\tiny,anchor=south west] at ($(SALn)+(0.1,0.04)$){SAL = 5 V conmutado del stack};
% ================= BLOQUES 8/9 · STACK RTK (Modo B dibujado) =================
\bnum{15.35,7.85}{8}
\node[font=\bfseries\tiny,Indigo,anchor=west] at (15.55,7.85){/ 9};
% linea SAL
\draw[net5V,line width=1pt] (SALn) -- (20.0,7.6);
% F9P
\node[draw,fill=blue!7,rounded corners,inner sep=0] (F9P) at (15.5,4.6) [minimum width=4cm,minimum height=5.2cm]{};
\node[font=\bfseries\scriptsize,align=center] at (15.5,6.6){simpleRTK2B Pro\\(ZED-F9P)};
\node[font=\tiny,align=center,Indigo] at (15.5,2.55){switch XBee $\rightarrow$ \textbf{UART1}\\(socket del Pro VACÍO)};
% 5V top
\fill[net5V] (14.2,7.6) circle(1.4pt);
\draw[net5V,line width=0.9pt] (14.2,7.6) -- (14.2,7.2);
\node[font=\bfseries\tiny,anchor=north] at (14.2,7.15){5V};
% IOREF / GND izq
\node[font=\bfseries\tiny,anchor=west] at (13.55,6.4){IOREF};
\draw[net3V3,line width=0.9pt] (13.5,6.4) -- (12.8,6.4); \flagg{net3V3}{f3b}{12.5,6.4}{3V3}
\node[font=\bfseries\tiny,anchor=west] at (13.55,5.6){GND};
\draw[netGND,line width=0.9pt] (13.5,5.6) -- (12.9,5.6) -- (12.9,5.15) node[ground]{};
% RX1 / TX1
\node[font=\bfseries\tiny,anchor=west] at (13.55,4.6){RX1};
\node[font=\bfseries\tiny,anchor=west] at (13.55,4.0){TX1};
\draw[netSig,line width=0.9pt] (4.6,5.6) -- (12.3,5.6) -- (12.3,4.6) -- (13.5,4.6);
\draw[netSig,line width=0.9pt] (4.6,5.0) -- (11.9,5.0) -- (11.9,4.0) -- (13.5,4.0);
\node[netSig,font=\tiny,anchor=south] at (8.0,5.62){PA2 $\rightarrow$ RX1 (NMEA, cruce TX/RX)};
\node[netSig,font=\tiny,anchor=north] at (6.8,4.97){PA3 $\leftarrow$ TX1};
% antena GNSS (borde derecho)
\draw (17.5,6.6) -- (18.4,6.6); \ant{18.4}{6.6}
\node[font=\tiny,anchor=north west] at (18.4,6.35){Ant. GNSS (SMA)};
% TX2 / RX2 (borde inferior)
\node[font=\bfseries\tiny,anchor=south] at (14.6,2.05){TX2};
\node[font=\bfseries\tiny,anchor=south] at (16.4,2.05){RX2};
% TX2 -> PA10
\draw[netSig,line width=0.9pt] (14.6,2.0) -- (14.6,1.2) -- (11.5,1.2) -- (11.5,4.2) -- (4.6,4.2);
\node[netSig,font=\tiny,anchor=south] at (8.6,4.25){F9P TX2 $\rightarrow$ PA10 (subida al MCU · Modo B)};
% pull-up 22k DFU en PA10
\fill (11.5,3.0) circle(1.3pt);
\draw (11.5,3.0) to[R,l=$22$k] (12.6,3.0); \flagg{net3V3}{f3e}{12.9,3.0}{3V3}
\node[font=\tiny,gray,anchor=north] at (11.9,2.62){DFU-safe};
% PA9 -> DIN
\draw[netSig,line width=0.9pt] (4.6,3.4) -- (5.5,3.4) -- (5.5,3.9) -- (11.1,3.9) -- (11.1,0.8) -- (19.6,0.8) -- (19.6,3.3) -- (20.0,3.3);
\node[netSig,font=\tiny,anchor=north] at (9.3,3.85){PA9 $\rightarrow$ 4G DIN (releva + inyecta \$PHLG)};
% XBee 4G
\node[draw,fill=black!8,rounded corners,inner sep=0] (G4) at (21.7,3.7) [minimum width=3.4cm,minimum height=3.8cm]{};
\node[font=\bfseries\scriptsize,align=center] at (21.7,4.6){4G NTRIP Master\\(XBee)};
\node[font=\tiny,align=center] at (21.4,3.85){en breakout BOB-08276\\(paso 2.0 mm $\rightarrow$ 2.54)};
\node[font=\bfseries\tiny,anchor=west] at (20.05,3.3){3 RX (DIN)};
\node[font=\bfseries\tiny,anchor=west] at (20.05,2.5){2 TX (DOUT)};
\node[font=\bfseries\tiny,anchor=east] at (23.35,4.9){1 VCC};
\node[font=\bfseries\tiny,anchor=east] at (23.35,4.2){14 VREF};
\node[font=\bfseries\tiny,anchor=east] at (23.35,3.6){6 V\_USB};
\node[font=\bfseries\tiny,anchor=east] at (23.35,3.0){7 USB$+$};
\node[font=\bfseries\tiny,anchor=east] at (23.35,2.4){8 USB$-$};
% pines obligatorios del borde inferior: RESET · LED · GND x4 · ON/OFF (leyenda abajo)
\node[font=\bfseries\tiny,anchor=south] at (20.4,1.9){5};
\node[font=\bfseries\tiny,anchor=south] at (21.2,1.9){13};
\node[font=\bfseries\tiny,anchor=south] at (22.0,1.9){G};
\node[font=\bfseries\tiny,anchor=south] at (22.8,1.9){20};
\draw[netSig,line width=0.8pt] (20.4,1.8) -- (20.4,1.35);
\draw (20.4,1.35) to[push button] (20.4,0.45);
\draw[netGND] (20.4,0.45) -- (20.4,0.25) node[ground]{};
\draw[netSig,line width=0.8pt] (21.2,1.8) -- (21.2,1.45);
\draw (21.2,1.45) to[R] (21.2,0.55);
\draw (21.2,0.55) to[leD] (21.2,-0.35);
\draw[netGND] (21.2,-0.35) -- (21.2,-0.5) node[ground]{};
\node[font=\tiny,anchor=west] at (21.4,1.0){1k};
\draw[netGND,line width=0.9pt] (22.0,1.8) -- (22.0,1.3) node[ground]{};
\draw[netGND,line width=0.9pt] (22.8,1.8) -- (22.8,1.3) node[ground]{};
\node[font=\tiny,anchor=north west,align=left] at (19.9,-0.95){\textbf{5}$=$RESET (al aire $=$ ON) · \textbf{13}$=$LED (tenue, 1.8 V)\\\textbf{G}$=$GND, pines \textbf{4·10·11·15 (los cuatro)} · \textbf{20}$=$ON/OFF$\rightarrow$\textbf{GND $=$ siempre ON}};
% USB (solo configuracion desde la PC)
\node[draw,rounded corners,fill=blue!6,inner sep=0] (USBB) at (26.0,3.1) [minimum width=2.6cm,minimum height=2.2cm]{};
\node[font=\bfseries\tiny,align=center] at (26.0,3.8){Breakout USB-C\\(con 5.1k en CC)};
\node[font=\tiny,align=center,Indigo] at (26.0,2.6){$\rightarrow$ PC\\SOLO configuración};
\node[font=\bfseries\tiny,anchor=west] at (24.75,3.6){VBUS};
\node[font=\bfseries\tiny,anchor=west] at (24.75,3.0){D$+$};
\node[font=\bfseries\tiny,anchor=west] at (24.75,2.4){D$-$};
\draw[net5V,line width=0.9pt] (23.4,3.6) -- (24.7,3.6);
\draw[netSig,line width=0.9pt] (23.4,3.0) -- (24.7,3.0);
\draw[netSig,line width=0.9pt] (23.4,2.4) -- (24.7,2.4);
\node[net5V,font=\tiny,anchor=south] at (24.05,3.65){5 V};
\draw[netGND,line width=0.9pt] (26.0,2.0) -- (26.0,1.55) node[ground]{};
% DOUT -> RX2 directo (RTCM3)
\draw[netSig,densely dashed,line width=1pt,-{Stealth}] (20.0,2.5) -- (19.2,2.5) -- (19.2,1.5) -- (16.4,1.5) -- (16.4,2.0);
\node[netSig,font=\tiny,anchor=north] at (17.9,1.4){RTCM3 \textbf{DIRECTO} $\rightarrow$ F9P RX2 (no pasa por el MCU)};
% antenas LTE
\draw (21.0,5.6) -- (21.0,5.9); \ant{21.0}{5.9}
\draw (22.4,5.6) -- (22.4,5.9); \ant{22.4}{5.9}
\node[font=\tiny,anchor=south,align=center] at (21.4,6.8){2$\times$ ant. LTE (¡antes de energizar!)\\$\rightarrow$ servidor NTRIP};
% buck MODEM 3.3V
\node[draw,rounded corners,fill=blue!6,minimum width=2.6cm,minimum height=1.2cm,font=\tiny,align=center] (BKM) at (21.8,8.6){LM2596/MP1584\\«MODEM 3.3 V» (aj.)};
\draw[net5V,line width=0.9pt] (20.0,7.6) -- (20.0,8.6) -- (20.5,8.6);
\draw[netGND] (21.2,8.0) -- (21.2,7.5) node[ground]{};
\draw[net3V3,line width=0.9pt] (23.1,8.6) -- (23.9,8.6) -- (23.9,4.2) -- (23.4,4.2);
\fill[net3V3] (23.9,4.9) circle(1.3pt);
\draw[net3V3,line width=0.9pt] (23.9,4.9) -- (23.4,4.9);
\node[net3V3,font=\tiny,anchor=west,align=left] at (24.0,4.55){VREF(14) $\rightarrow$ VCC\\\textbf{obligatorio}};
\node[net3V3,font=\bfseries\tiny,anchor=west] at (24.0,8.6){3.3 V — NUNCA 5 V};
\fill[net3V3] (23.9,6.4) circle(1.4pt);
\draw (23.9,6.4) -- (24.7,6.4); \draw (24.7,6.4) to[C,l=$100\,\mu$F$+$100 nF] (24.7,5.3);
\draw[netGND] (24.7,5.3) -- (24.7,5.1) node[ground]{};
\node[font=\tiny,gray,anchor=west,align=left] at (24.0,7.5){junto al pin VCC\\(picos LTE hasta \textbf{2 A})};
% ================= BLOQUE 6 · AHT10 (I2C1) =================
\bnum{7.5,3.35}{6}
\node[draw,rounded corners,inner sep=0] (AHT) at (8.85,1.9) [minimum width=2.1cm,minimum height=2.2cm]{};
\node[font=\bfseries\scriptsize,align=center] at (8.85,2.55){AHT10\\(T $+$ RH)};
\node[font=\tiny] at (9.0,2.0){0x38 fija};
\node[font=\tiny,Indigo,align=center] at (8.95,1.2){SOLO él en el bus\\3V3 — nunca 5 V};
\node[font=\bfseries\tiny,anchor=west] at (7.85,2.2){SCL}; \node[font=\bfseries\tiny,anchor=west] at (7.85,1.6){SDA};
\draw[netSig,line width=0.9pt] (4.6,2.2) -- (7.8,2.2);
\draw[netSig,line width=0.9pt] (4.6,1.6) -- (7.8,1.6);
\fill (6.6,2.2) circle(1.3pt); \draw (6.6,2.2) to[R,l_=$4.7$k] (6.6,3.4); \flagg{net3V3}{f3f}{6.6,3.6}{3V3}
\fill (7.5,1.6) circle(1.3pt); \draw (7.5,1.6) to[R,l_=$4.7$k] (7.5,0.4); \flagg{net3V3}{f3g}{7.5,0.18}{3V3}
\draw[net3V3,line width=0.9pt] (9.9,2.6) -- (10.5,2.6); \flagg{net3V3}{f3h}{10.75,2.6}{3V3}
\node[font=\bfseries\tiny,anchor=east] at (9.85,2.6){VCC};
\node[font=\bfseries\tiny,anchor=west] at (9.0,0.62){GND};
\draw[netGND,line width=0.9pt] (8.85,0.8) -- (8.85,0.42) node[ground]{};
% ================= BLOQUE 2 · LED PB0 =================
\bnum{5.3,-0.25}{2}
\draw[netSig,line width=0.9pt] (4.6,0.4) -- (5.1,0.4);
\draw (5.1,0.4) to[R,l=$330\,\Omega$] (6.6,0.4);
\draw (6.6,0.4) to[leD] (6.6,-0.7);
\draw[netGND] (6.6,-0.7) -- (6.6,-0.9) node[ground]{};
\node[font=\tiny,anchor=west] at (6.95,-0.75){LED estado};
% ================= BLOQUE 5 · VENTILADOR =================
\bnum{5.6,-1.9}{5}
\draw[netSig,line width=0.9pt] (4.6,-1.2) -- (6.1,-1.2) -- (6.1,-2.6);
\draw (6.1,-2.6) to[R,l=$220$] (7.9,-2.6);
\fill (8.3,-2.6) circle(1.3pt);
\draw[netSig] (7.9,-2.6) -- (8.3,-2.6);
\node[nmos,anchor=gate] (M2) at (8.9,-2.6){};
\node[font=\tiny,anchor=west] at (10.0,-3.3){IRLZ44N (N, lógico)};
\node[font=\tiny,gray,anchor=south west] at ($(M2.drain)+(0.06,0.0)$){D};
\node[font=\tiny,gray,anchor=north west] at ($(M2.source)+(0.06,0.0)$){S};
\node[font=\tiny,gray,anchor=south] at ($(M2.gate)+(0.18,0.08)$){G};
\draw (8.3,-2.6) to[R,l_=$100$k] (8.3,-4.2);
\draw[netGND] (8.3,-4.2) -- (8.3,-4.4) node[ground]{};
\draw[netGND] (M2.source) -- (M2.source |- 0,-3.7) node[ground]{};
\draw[netGND,line width=0.9pt] (M2.drain) -- (M2.drain |- 0,-1.5);
\draw[netGND,line width=0.9pt] (M2.drain |- 0,-1.5) -- (11.65,-1.5);
\node[draw,circle,minimum size=1.1cm,font=\scriptsize] (FAN) at (12.2,-1.5){VENT};
\node[font=\tiny,anchor=north] at (12.2,-2.1){2 hilos};
\node[font=\tiny,anchor=north west] at (11.6,-1.55){$-$};
\node[net5V,font=\tiny,anchor=south west] at (12.28,-0.98){$+$};
\draw[net5V,line width=0.9pt] (FAN.north) -- (12.2,-0.3);
\draw[net5V,line width=1pt] (10.4,-0.3) -- (13.8,-0.3);
\node[net5V,font=\bfseries\tiny,anchor=south] at (11.2,-0.25){5 V VENT (separado)};
\fill (10.4,-1.5) circle(1.3pt); \fill[net5V] (10.4,-0.3) circle(1.3pt); \fill[net5V] (12.2,-0.3) circle(1.3pt);
\draw (10.4,-1.5) to[D,l={\tiny 1N5819}] (10.4,-0.3);
\node[draw,rounded corners,fill=blue!6,minimum width=2.3cm,minimum height=1.2cm,font=\tiny,align=center] (BKV) at (15.0,-0.3){LM2596 «VENT»\\24 $\rightarrow$ \textbf{5.0 V} (aj.)};
\draw[netGND] (15.0,-0.9) -- (15.0,-1.35) node[ground]{};
% --- 5b · Protección de polaridad 24 V: Q10 (P-FET) + DzG 15 V + 100k ---
\node[font=\bfseries\tiny,Indigo,anchor=south] at (17.1,0.05){5b · protección 24 V};
\draw[netIgn,line width=0.9pt] (16.15,-0.3) -- (19.0,-0.3);
\node[netIgn,font=\tiny,anchor=south] at (17.5,-0.28){24 V protegido};
\node[pmos,anchor=source,rotate=0] (QX) at (19.0,-0.3){};
\node[font=\tiny,anchor=west,align=left] at (19.5,-0.55){Q10\\IRF9540N (P)};
\node[font=\tiny,gray,anchor=south east] at (19.0,-0.25){S};
\node[font=\tiny,gray,anchor=north west] at ($(QX.drain)+(0.05,0.0)$){D};
\node[font=\tiny,gray,anchor=east] at ($(QX.gate)+(-0.05,0.15)$){G};
\draw[netIgn,line width=0.9pt] (QX.drain) -- (QX.drain |- 0,-1.7) -- (19.4,-1.7) -- (19.4,-2.1);
\node[netIgn,font=\bfseries\tiny,anchor=north] at (19.4,-2.2){Fuente 24 V (banco / gabinete)};
\draw[netSig] (QX.gate) -- (17.3,-0.85 |- QX.gate); \fill (17.3,-0.85 |- QX.gate) circle(1.3pt);
\draw (17.3,-0.85 |- QX.gate) to[R,l_=$100$k] (17.3,-2.35);
\draw[netGND] (17.3,-2.35) -- (17.3,-2.5) node[ground]{};
\draw (17.3,-0.85 |- QX.gate) to[zD,l={\tiny DzG 15 V}] (17.3,-0.3);
\fill[netIgn] (17.3,-0.3) circle(1.3pt);
\node[font=\tiny,gray,anchor=north west,align=left] at (16.2,-2.75){si conectas la fuente al revés, Q10 corta\\— protege buck y DFR · DzG $=$ 1N4744A 1 W};
% ================= AVISOS =================
\node[draw,rounded corners,fill=gray!6,anchor=north west,align=left,font=\scriptsize,text width=19.6cm,inner sep=7pt] at (-20.4,-5.9){%
\textbf{\textcolor{Indigo}{Avisos (verificación):}}\\[2pt]
$\bullet$ \textbf{Modo A (por defecto):} el 4G va \textbf{dentro} del socket XBee del Pro (switch $\rightarrow$ UART2); PA9, PA10, la buck «MODEM 3.3 V» y el breakout \textbf{no se usan}; todo lo demás igual. El diagrama dibuja el \textbf{Modo B} (diagnóstico \$PHLG).\\
$\bullet$ \textbf{Apagado = estado seguro:} el stack arranca \textbf{OFF} (pull-up de 10 k en la compuerta del IRF9540N); PA1 en ALTO lo enciende.\\
$\bullet$ \textbf{Nunca 5 V} a PA0/PA4/PA7/PB1 sin divisor ni a \textbf{PA5} (digital, máx 3.3 V — clamp Schottky \textbf{1N5819} del kit a 3V3; en el PCB es BAT54). \textbf{IOREF $\rightarrow$ 3V3 es obligatorio} (sin él, los UART del Pro no responden).\\
$\bullet$ \textbf{4G en breakout — pines obligatorios:} \textbf{VREF(14)$\rightarrow$VCC} y \textbf{ON/OFF(20)$\rightarrow$GND} (sin ellos el módem puede no encender) $+$ \textbf{los 4 GND (4·10·11·15)}. \textbf{VCC $=$ 3.3 V, NUNCA 5 V} (buck dedicada desde SAL, picos \textbf{2 A}: reiniciar el stack reinicia el módem). USB (V\_USB$=$VBUS 5 V $+$ D$\pm$) \textbf{solo para configurar} desde la PC. En Modo A el socket del Pro resuelve todos estos pines.\\
$\bullet$ \textbf{AHT10: solo él} en I\textsuperscript{2}C1 y solo a 3V3.\\
$\bullet$ Ventilador en \textbf{5 V separado} (LM2596 ajustado a 5.0 V con multímetro); IRLZ44N debe ser \textbf{lógico}. MT3608 ajustado \textbf{apenas por debajo} del 5 V del vehículo (prioridad al vehículo). Electrolíticos \textbf{con polaridad}.\\
$\bullet$ Blackpill: \textbf{USB y riel 5 V nunca al mismo tiempo}. Bench: bloques 1+3 bastan para el arranque; agrega el resto en orden.\\
$\bullet$ \textbf{Disipadores TO-220} (perfboard 10$\times$10): ponlos en \textbf{Q10} y el \textbf{IRF9540N del interruptor de carga}; opcional en IRLZ44N y el IRF9540N de carga de batería. \textbf{La tab metálica $=$ DRAIN} — si dos comparten disipador, usa mica/aislante. Plano sugerido 10$\times$10: \textbf{potencia a la izquierda · Blackpill al centro · stack RTK a la derecha} (igual que esta hoja); módulos sobre headers hembra, nunca soldados directo.};
% ================= FRANJA DE PINOUTS (para el técnico de soldadura) =================
\begin{scope}[shift={(0,-0.75)}]
\node[anchor=north west,font=\bfseries\small,Indigo] at (-20.4,-9.8)
{Pinouts — identifica CADA pieza antes de soldar (vistas de frente / superior)};
% --- A) 4G NTRIP Master (XBee) 20 pines, vista superior ---
\node[draw,rounded corners,fill=gray!5,inner sep=5pt,anchor=north west] (PXB) at (-20.4,-10.4) [minimum width=6.6cm,minimum height=4.6cm]{};
\node[anchor=north west,font=\bfseries\tiny,Indigo] at (-20.2,-10.55){4G NTRIP Master (XBee) — vista superior, antenas arriba};
\node[draw,fill=black!12,rounded corners,inner sep=0] at (-17.05,-12.85) [minimum width=1.5cm,minimum height=3.3cm]{};
\foreach \i/\txt/\st in {1/{\textbf{1 VCC 3.3--3.6 V (2 A pk)}}/b,2/{2 TX (DOUT)}/n,3/{3 RX (DIN)}/n,4/{\textbf{4 GND}}/b,5/{5 RESET (al aire $=$ ON)}/n,6/{6 V\_USB (5 V $=$ VBUS)}/n,7/{7 USB$+$}/n,8/{8 USB$-$}/n,9/{9 DTR — no conectar}/n,10/{\textbf{10 GND}}/b}{
\draw ($(-17.8,-11.35)+(0,-0.31*\i+0.31)$) -- ++(-0.28,0);
\node[font=\tiny,anchor=east] at ($(-18.12,-11.35)+(0,-0.31*\i+0.31)$) {\txt};}
\foreach \i/\txt in {1/{\textbf{20 ON/OFF $\rightarrow$ GND $=$ ON}},2/{19 —},3/{18 —},4/{17 —},5/{16 RTS — no conectar},6/{\textbf{15 GND}},7/{\textbf{14 VREF $\rightarrow$ VCC}},8/{13 LED (1.8 V)},9/{12 CTS — no conectar},10/{\textbf{11 GND}}}{
\draw ($(-16.3,-11.35)+(0,-0.31*\i+0.31)$) -- ++(0.28,0);
\node[font=\tiny,anchor=west] at ($(-15.98,-11.35)+(0,-0.31*\i+0.31)$) {\txt};}
% --- B) TO-92 ---
\node[draw,rounded corners,fill=gray!5,inner sep=5pt,anchor=north west] at (-13.5,-10.4) [minimum width=3.6cm,minimum height=4.6cm]{};
\node[anchor=north west,font=\bfseries\tiny,Indigo] at (-13.3,-10.55){TO-92 (parte plana AL FRENTE)};
\node[draw,fill=black!12,rounded corners=2pt] at (-12.3,-11.6) [minimum width=1.1cm,minimum height=0.55cm]{};
\foreach \x/\l in {-12.65/E,-12.3/B,-11.95/C}{ \draw (\x,-11.87) -- (\x,-12.15); \node[font=\bfseries\tiny,anchor=north] at (\x,-12.17){\l}; }
\node[font=\tiny,anchor=west] at (-11.6,-11.7){\textbf{2N3904}};
\node[draw,fill=black!12,rounded corners=2pt] at (-12.3,-13.2) [minimum width=1.1cm,minimum height=0.55cm]{};
\foreach \x/\l in {-12.8/{$+$V},-12.3/OUT,-11.8/G}{ \draw (\x,-13.47) -- (\x,-13.75); \node[font=\bfseries\tiny,anchor=north] at (\x,-13.77){\l}; }
\node[font=\tiny,anchor=west] at (-11.6,-13.3){\textbf{LM35}};
\node[font=\tiny,gray,anchor=north west,align=left] at (-13.3,-14.15){si lo volteas, el orden se invierte};
% --- C) TO-220 ---
\node[draw,rounded corners,fill=gray!5,inner sep=5pt,anchor=north west] at (-9.6,-10.4) [minimum width=3.7cm,minimum height=4.6cm]{};
\node[anchor=north west,font=\bfseries\tiny,Indigo] at (-9.4,-10.55){TO-220 (frente; tab metálica atrás)};
\node[draw,fill=black!30] at (-8.1,-11.35) [minimum width=1.15cm,minimum height=0.3cm]{};
\node[draw,fill=black!12] at (-8.1,-11.9) [minimum width=1.15cm,minimum height=0.8cm]{};
\foreach \x/\l in {-8.45/G,-8.1/D,-7.75/S}{ \draw (\x,-12.3) -- (\x,-12.6); \node[font=\bfseries\tiny,anchor=north] at (\x,-12.62){\l}; }
\node[font=\tiny,anchor=north west,align=left] at (-9.4,-13.15){\textbf{IRF9540N} (P) y \textbf{IRLZ44N} (N):\\G--D--S · \textbf{la tab $=$ D (drain)}\\no atornilles tabs a un mismo\\disipador sin aislante};
% --- D) Diodos / LED / electrolítico ---
\node[draw,rounded corners,fill=gray!5,inner sep=5pt,anchor=north west] at (-5.6,-10.4) [minimum width=4.6cm,minimum height=4.6cm]{};
\node[anchor=north west,font=\bfseries\tiny,Indigo] at (-5.4,-10.55){Polaridad};
\draw (-5.3,-11.5) to[D] (-3.9,-11.5);
\node[font=\tiny,anchor=west] at (-3.75,-11.5){\textbf{1N5819/4744}: franja $=$ cátodo (K)};
\draw (-5.3,-12.5) to[leD] (-3.9,-12.5);
\node[font=\tiny,anchor=west] at (-3.75,-12.5){\textbf{LED}: pata larga $=$ ánodo ($+$)};
\draw (-5.3,-13.5) to[C] (-3.9,-13.5);
\node[font=\tiny,anchor=west] at (-3.75,-13.5){\textbf{Electrolítico}: franja $=$ negativo ($-$)};
\node[font=\tiny,gray,anchor=north west] at (-5.4,-14.15){cerámicos (104) no tienen polaridad};
% --- E) Módulos (pads de conexión) ---
\node[draw,rounded corners,fill=gray!5,inner sep=5pt,anchor=north west] at (-0.6,-10.4) [minimum width=14.2cm,minimum height=4.6cm]{};
\node[anchor=north west,font=\bfseries\tiny,Indigo] at (-0.4,-10.55){Módulos — pads (vista superior)};
\node[draw,fill=blue!6,rounded corners] (mTP) at (0.9,-12.4) [minimum width=2.0cm,minimum height=1.6cm,font=\bfseries\tiny]{TP4056};
\node[font=\tiny,anchor=east] at (-0.15,-11.9){IN$+$}; \node[font=\tiny,anchor=east] at (-0.15,-12.9){IN$-$};
\node[font=\tiny,anchor=west] at (1.95,-11.9){B$+$}; \node[font=\tiny,anchor=west] at (1.95,-12.9){B$-$};
\node[font=\tiny,gray,anchor=north] at (0.9,-13.35){OUT$\pm$: sin usar};
\node[draw,fill=blue!6,rounded corners] (mMT) at (4.45,-12.4) [minimum width=1.9cm,minimum height=1.6cm,font=\bfseries\tiny,align=center]{MT3608\\{\tiny trimmer $=$ ajuste}};
\node[font=\tiny,anchor=east] at (3.45,-11.9){IN$+$}; \node[font=\tiny,anchor=east] at (3.45,-12.9){IN$-$};
\node[font=\tiny,anchor=west] at (5.45,-11.9){OUT$+$}; \node[font=\tiny,anchor=west] at (5.45,-12.9){OUT$-$};
\node[draw,fill=blue!6,rounded corners] (mLM) at (8.1,-12.4) [minimum width=2.0cm,minimum height=1.6cm,font=\bfseries\tiny,align=center]{LM2596\\{\tiny $\times$2: VENT 5.0 V}\\{\tiny y MODEM 3.3 V}};
\node[font=\tiny,anchor=east] at (7.05,-11.9){IN$+$}; \node[font=\tiny,anchor=east] at (7.05,-12.9){IN$-$};
\node[font=\tiny,anchor=west] at (9.15,-11.9){OUT$+$}; \node[font=\tiny,anchor=west] at (9.15,-12.9){OUT$-$};
\node[draw,fill=blue!6,rounded corners] (mDF) at (11.8,-12.4) [minimum width=1.8cm,minimum height=1.6cm,font=\bfseries\tiny]{DFR1015};
\node[font=\tiny,anchor=east] at (10.85,-11.9){IN$+$}; \node[font=\tiny,anchor=east] at (10.85,-12.9){IN$-$};
\node[font=\tiny,anchor=west] at (12.75,-11.9){OUT$+$}; \node[font=\tiny,anchor=west] at (12.75,-12.9){OUT$-$};
\node[font=\tiny,gray,anchor=north,align=center] at (11.8,-13.4){IN$-$/OUT$-$ $=$ GND común};
\node[font=\tiny,anchor=north west,align=left] at (-0.4,-14.35){\textbf{AHT10}: VIN$\rightarrow$3V3 · GND · SCL$\rightarrow$PB6 · SDA$\rightarrow$PB7 \quad · \quad \textbf{Breakout USB-C}: VBUS · D$+$ · D$-$ · GND \quad · \quad \textbf{BOB-08276}: hembras 2.0 mm arriba, pines 2.54 abajo (pin 1 marcado)};
% --- F) Resistencias usadas (código de 4 bandas) ---
\node[draw,rounded corners,fill=gray!5,inner sep=5pt,anchor=north west] at (14.0,-10.4) [minimum width=9.4cm,minimum height=4.6cm]{};
\node[anchor=north west,font=\bfseries\tiny,Indigo] at (14.2,-10.55){Resistencias usadas — código de colores (4ª banda dorada $=$ $\pm$5\,\%)};
\node[font=\tiny,anchor=north west,align=left,inner sep=0] at (14.2,-11.1){%
\begin{tabular}{@{}l l@{\hspace{2.2em}}l l@{}}
$100\,\Omega$ & \csq{cafe}\,\csq{black}\,\csq{cafe}\,\csq{dorado} & $4.7$ k & \csq{yellow}\,\csq{violet}\,\csq{red}\,\csq{dorado}\\[1pt]
$220\,\Omega$ & \csq{red}\,\csq{red}\,\csq{cafe}\,\csq{dorado} & $10$ k & \csq{cafe}\,\csq{black}\,\csq{orange}\,\csq{dorado}\\[1pt]
$330\,\Omega$ & \csq{orange}\,\csq{orange}\,\csq{cafe}\,\csq{dorado} & $22$ k & \csq{red}\,\csq{red}\,\csq{orange}\,\csq{dorado}\\[1pt]
$1$ k & \csq{cafe}\,\csq{black}\,\csq{red}\,\csq{dorado} & $100$ k & \csq{cafe}\,\csq{black}\,\csq{yellow}\,\csq{dorado}\\
\end{tabular}};
\node[font=\tiny,gray,anchor=north west,align=left] at (14.2,-13.6){en duda: mídela con el multímetro antes de soldar\\pines del \textbf{Blackpill}: etiquetados en el cuerpo del diagrama (centro)};
\end{scope}
\end{tikzpicture}
\end{document}
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