Arduino-based model car control for EPIC. This is a PCB which mounts on a model car used in the Partner Classes taught at EPIC.
- Electronics Talk -- Google doc link for summer 2023 talk
- Software Development Log
- Wiring Diagram -- how to wire the PCB to the car
- Programming Instructions -- instructions to change the target distance
- Arduino pro micro socket
- MOSFET for motor control
- Optical sensor for wheel revolution counter
- Headlights and taillights with individual control
- Small speaker
- Bottom-mounted pushbutton switch for user inputs
- Screw terminal connectors for a 6V battery pack (4xAA) and motor
- Header connector for a power switch
Current software in Arduino/car_control/car_control.ino
power-up reads distance set from EEPROM
long (error) beep means invalid setting (default to 5)
Idle mode
short press - drive for programmed distance
long press - move to 10's set mode
10's set mode
short press: add 10 revs
long press: to 1's set mode
1's set mode
short press: add 1 revs
long press: save setting and exit to IDLE
Current setting displayed in binary on LEDs as
| Location | Value |
|---|---|
| Right Front | 1 |
| Left Front | 2 |
| Left Rear | 4 |
| Right Rear | 8 |
(value is sum of lit LEDs, or zero if all off)
Note that the current setting can be displayed with:
- Long Press - display 10's
- Long Press - display 1's
- Long Press - return to idle
Sensor test:
- Hold button while powering up
- Then press the button repeatedly:
- first press: long beep, take reading, display low 4 bits
- second press: display high 4 bits
Power down and up to exit test mode