ESP32 Smart City Controller

Worked for 8 mins 15 sec

Created 11 project docs

Project Specification — ESP32 Smart City Controller

Status: Review ESP32 DevKitC 38-pin carrier PCB for a smart-city demonstration with distance sensing, servo actuation, sound/sensitivity ana...

Power Budget — ESP32 Smart City Controller

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| Rail | Load | Typical | Peak / Design Case | Basis | |---|---|---:|---:|---|

Firmware Starter — ESP32 DevKitC

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MCU board: ESP32 DevKitC 38-pin / esp32dev Framework: Arduino

Board Bring-Up Plan — ESP32 Smart City Controller

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Current-limited 5 V bench supply, multimeter, oscilloscope, USB cable, known HC-SR04, known servo, microphone module, 10 kΩ potentiometer, a...

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flux

Created and verified the complete ESP32 Smart City Controller schematic, including HC-SR04 level shifting, servo stabilization, analog inputs, and six LED channels. Documentation: Project Specification, Power Budget, Firmware Starter, and Bring-Up Plan.

Open item: ERC reports U1:VP as an unpowered supply due to an incorrect library pin classification; VP is actually unused GPIO36 and is correctly marked no-connect.
Next: confirm the servo model/stall current, then configure the board and place components with antenna keepout and wide 5 V/ground paths.

andy71934

hay un capacitor que no esta donde deveria estar ponlo en su lugar

Thought for 7 sec

flux

Claro — necesito que me indiques cuál capacitor y dónde debería ir.

Puedes responder con algo como:

“C1 debe ir junto al conector del servo J3”
“C3 debe ir cerca del pin 5V del ESP32”
“El capacitor cerca de la esquina inferior derecha debe ir junto a U1”

Si puedes, selecciona el capacitor en Flux o dime su designador (C1, C2, C3, C4 o C5) y lo muevo a su lugar.

andy71934

ya lo tengo seleccionado

Thought for 6 sec

flux

Perfecto, revisaré el componente seleccionado y lo recolocaré donde corresponde según su función en el circuito.

Worked for 7 mins 33 sec

flux

Listo. Moví C1 junto al conector del servo J3, manteniendo el resto de los componentes en sus posiciones. Verifiqué que quedó dentro de la placa y sin solapamientos.

Revisar, enrutar y verificar

Revisar colocación completa

Enrutar placa

Ejecutar DRC

Revisar polaridad

Files

Schematic

Layout

Preview

J10

Resistance

220Ω

Capacitance

47uF

Resistance

220Ω

Resistance

220Ω

J11

Resistance

10kΩ

Resistance

18kΩ

Capacitance

100nF

Resistance

220Ω

Capacitance

470uF

Resistance

220Ω

Resistance

220Ω

Capacitance

100nF

Capacitance

100nF

Resistance

470Ω

R10

Resistance

10kΩ

R11

Resistance

10kΩ

Power Budget — ESP32 Smart City Controller

Estimated Loads

Table

Rail	Load	Typical	Peak / Design Case	Basis
5 V input	ESP32 DevKitC including Wi-Fi bursts and onboard regulator	250 mA	700 mA	conservative module/board allowance
5 V input	HC-SR04	15 mA	20 mA	common module operating range
5 V input	Hobby servo	500 mA	1.8 A	assumed micro-servo; verify actual stall current
3.3 V via DevKit	Analog microphone module	5 mA	10 mA	module-dependent assumption
3.3 V GPIO	Six LEDs	36 mA	45 mA	about 6 mA/channel with red LEDs and 220 Ω
3.3 V	Potentiometer	0.33 mA	0.33 mA	10 kΩ across 3.3 V

Totals

Estimated typical 5 V source current: approximately 0.81 A.
Estimated peak with micro-servo stall and Wi-Fi burst: approximately 2.58 A.
Recommended supply: regulated 5 V, 3 A.
Minimum for a characterized low-current micro-servo: regulated 5 V, 2 A.

Power-Path Sizing

J1 is rated well above the 3 A design target.
5V_EXT and GND: design for 2 A continuous / 3 A peak.
PCB layout: at least 0.5 mm / 20 mil traces as requested; use wider pours/traces for J1-to-J3 servo power and return where space permits.
C1 470 uF provides local servo transient support; increase toward 1000 uF if bench testing shows resets or rail droop.

Open Assumption

The actual servo model is unspecified. Before manufacturing, replace the assumed 1.8 A stall current with the servo datasheet value and confirm the adapter, connector, copper, and capacitor sizing.

Estimated Loads
Totals
Power-Path Sizing
Open Assumption