Circuit Documentation

Summary

This document provides a detailed overview of a circuit design that includes various components such as a Raspberry Pi Pico, resistors, motors, switches, converters, and sensors. The circuit is designed to interface multiple components for a specific application, with connections managed through a multiplexer and power supplied by a battery and buck converters. The Raspberry Pi Pico microcontrollers are programmed to control the circuit's operations.

Component List

Raspberry Pi Pico

• Description: A microcontroller board based on the RP2040 microcontroller chip.
• Pins: 43 pins including GPIO, power, and ground pins.

Resistor

• Description: A passive electrical component that implements electrical resistance as a circuit element.
• Pins: 2 pins
• Properties:
  • Resistance: 4700 Ohms

MRB Planetary Gearbox Motor

• Description: A motor with a planetary gearbox for high torque applications.
• Pins: 2 pins (+, -)

REF-14C

• Description: A reference component with multiple pins for various connections.
• Pins: 14 pins (G, V, 1-14)

Toggle Switch SPST

• Description: A single-pole single-throw (SPST) toggle switch.
• Pins: 2 pins (L1, COM)

Buck Converter

• Description: A DC-DC converter that steps down voltage.
• Pins: 4 pins (IN+, IN-, OUT+, OUT-)

REF-MUX

• Description: A multiplexer for managing multiple signal inputs.
• Pins: 20 pins (G, SIG, D, C, B, A, I0-I13, V)

TFT 128x128 Colour I2C Blue PCB

• Description: A 128x128 color TFT display with I2C interface.
• Pins: 8 pins (BL, CS, DC, RES, SDA, SCL, VCC, GND)

OV7670

• Description: A camera module for capturing images.
• Pins: 18 pins (RET, PWDN, D0-D7, PLK, XLK, VS, HS, SCL, SDA, 3.3V, DGND)

Mini 360 Buck Converter

• Description: A small DC-DC buck converter.
• Pins: 4 pins (IN-, OUT-, OUT+, IN+)

Battery

• Description: A power source for the circuit.
• Pins: 2 pins (+, -)

REF-BTS 2CH

• Description: A reference component with multiple pins for various connections.
• Pins: 9 pins (M+, M-, GND, Vcc, P1, P2, P4, B+, B-)

0.96" OLED

• Description: A small OLED display.
• Pins: 4 pins (GND, VDD, SCK, SDA)

Pushbutton

• Description: A simple pushbutton switch.
• Pins: 4 pins (Pin 1, Pin 2, Pin 3, Pin 4)

Wiring Details

Raspberry Pi Pico

• Pin 1: Connected to OV7670 D0
• Pin 2: Connected to OV7670 D1
• Pin 3: Connected to TFT 128x128 Colour I2C Blue PCB GND and OV7670 DGND
• Pin 4: Connected to OV7670 D2
• Pin 5: Connected to OV7670 D3
• Pin 6: Connected to OV7670 D4
• Pin 7: Connected to OV7670 D5
• Pin 9: Connected to OV7670 D6
• Pin 10: Connected to OV7670 D7
• Pin 11: Connected to OV7670 PLK
• Pin 12: Connected to OV7670 XLK
• Pin 14: Connected to TFT 128x128 Colour I2C Blue PCB SDA
• Pin 15: Connected to TFT 128x128 Colour I2C Blue PCB SCL
• Pin 16: Connected to OV7670 HS
• Pin 17: Connected to OV7670 VS
• Pin 19: Connected to OV7670 RET
• Pin 20: Connected to OV7670 PWDN
• Pin 21: Connected to TFT 128x128 Colour I2C Blue PCB DC
• Pin 22: Connected to TFT 128x128 Colour I2C Blue PCB RES
• Pin 24: Connected to TFT 128x128 Colour I2C Blue PCB CS
• Pin 25: Connected to REF-MUX C
• Pin 26: Connected to REF-MUX B
• Pin 27: Connected to REF-MUX A
• Pin 29: Connected to REF-MUX SIG
• Pin 31: Connected to REF-MUX SIG
• Pin 36: Connected to TFT 128x128 Colour I2C Blue PCB VCC, OV7670 3.3V, Resistor pin2
• Pin 38: Connected to Mini 360 Buck Converter OUT-, REF-MUX G, 0.96" OLED GND
• Pin 39: Connected to Mini 360 Buck Converter OUT+, REF-MUX, 0.96" OLED VDD, REF-BTS 2CH Vcc

Resistor

• Pin 1: Connected to Raspberry Pi Pico pin 26, OV7670 SDA
• Pin 2: Connected to Raspberry Pi Pico pin 36, OV7670 3.3V

MRB Planetary Gearbox Motor

• Pin +: Connected to REF-BTS 2CH M-
• Pin -: Connected to REF-BTS 2CH M+

REF-14C

• Pin G: Connected to REF-MUX G
• Pin V: Connected to REF-MUX V
• Pin 1: Connected to REF-MUX I0
• Pin 2: Connected to REF-MUX I1
• Pin 3: Connected to REF-MUX I2
• Pin 4: Connected to REF-MUX I3
• Pin 5: Connected to REF-MUX I4
• Pin 6: Connected to REF-MUX I6
• Pin 7: Connected to REF-MUX I6
• Pin 8: Connected to REF-MUX I7
• Pin 9: Connected to REF-MUX I8
• Pin 10: Connected to REF-MUX I9
• Pin 11: Connected to REF-MUX I10
• Pin 12: Connected to REF-MUX I11
• Pin 13: Connected to REF-MUX I12
• Pin 14: Connected to REF-MUX I13

Toggle Switch SPST

• Pin L1: Connected to Mini 360 Buck Converter IN+
• Pin COM: Connected to battery +, Toggle Switch SPST L1

Buck Converter

• Pin IN+: Connected to Toggle Switch SPST COM
• Pin IN-: Connected to battery -, Pushbutton Pin 2
• Pin OUT+: Connected to REF-BTS 2CH B+
• Pin OUT-: Connected to REF-BTS 2CH B-, REF-BTS 2CH GND

REF-MUX

• Pin G: Connected to REF-14C G, Mini 360 Buck Converter OUT-, Raspberry Pi Pico pin 38, 0.96" OLED GND
• Pin V: Connected to REF-14C V
• Pin I0: Connected to REF-14C 1
• Pin I1: Connected to REF-14C 2
• Pin I2: Connected to REF-14C 3
• Pin I3: Connected to REF-14C 4
• Pin I4: Connected to REF-14C 5
• Pin I6: Connected to REF-14C 6, REF-14C 7
• Pin I7: Connected to REF-14C 8
• Pin I8: Connected to REF-14C 9
• Pin I9: Connected to REF-14C 10
• Pin I10: Connected to REF-14C 11
• Pin I11: Connected to REF-14C 12
• Pin I12: Connected to REF-14C 13
• Pin I13: Connected to REF-14C 14
• Pin SIG: Connected to Raspberry Pi Pico pin 31
• Pin D: Connected to Raspberry Pi Pico pin 24
• Pin C: Connected to Raspberry Pi Pico pin 25
• Pin B: Connected to Raspberry Pi Pico pin 26
• Pin A: Connected to Raspberry Pi Pico pin 27

TFT 128x128 Colour I2C Blue PCB

• Pin GND: Connected to Raspberry Pi Pico pin 3, OV7670 DGND
• Pin VCC: Connected to Raspberry Pi Pico pin 36, OV7670 3.3V, Resistor pin2
• Pin SDA: Connected to Raspberry Pi Pico pin 14