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README.md

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Hardware

!!!ATTENTION!!!
Do NOT use v1.1 -> use v1.2 (or higher) instead



Design

ZumoCom-System_with_Robot ZumoCom-System_with_Robot_1 ZumoCom-System

Features

  • Status LED
  • 2x 18650 Lithium-Ion batteries
  • Off/On-Switch
  • Reset/AP-Mode-Button
  • User-Buttons (A,B,C)
  • User-LEDs (A,B,C) -> mirror mode
  • BMS included
  • Battery voltage measurement
  • RESET-Jumper for BMS



Toolchain

  • KiCad (v5.1.6)



Changelog

v1.2

  • pad size from L2 increased (again)
  • Jumper for BMS-reset added
  • State LED to 3V3 (istead to 5V) connected
  • order from LEDs (egual to ZumoRobot >>> same color) adapted
  • connection between LEDs A, B and C and the ESP removed. Routed them to mirror the LEDs on the Zumo
  • Main-Switch circuit removed
  • all Pins from the Display through connected
  • Battery voltage measurement to pin 35 connected >>> LEDs/Buttons got a new pin on ESP32

v1.1 (15.08.2022)

Power supply

  • Mosfet Q1 does not switch off. >>> voltage divider and select other MOSFET removed

Voltage regulator 5V:

  • /SHDN pin connected to VOut >>> must be connected to VIN (do not solder pin to pad)
  • correct coil selected
  • FB/SENSE pin does not go to output >>> PIN 3 (FB) with thread wire to pin 5 (5V/Bias) >>> (do not solder pin to pad)
  • VC Pin not to Vin

Voltage regulator 3V3:

  • Coil pad too small >>> maked larger

ESP32

  • wrong 3V3 supply >>> the one from voltage regulator choosed >>> diode between 3V3 and VDD
  • U_Bat_Meas not on IO2 >>> to pin IO13 connected
  • test vias for D+ u. D- added

MAX:

  • D+/D- serial resistor 22 OHM inserted
  • Test vias for D+ u. D- inserted

Peripherals

  • RGB LED pining does not fit >>> compared with data sheet and changed
  • 0 Ohm resistors buttons removed

v1.0 (13.05.2022)

  • First Prototype Version