Arduino Uno based delay-off-timer for electrical devices.
- Arduino Nano (with Uno bootloader)
- TM1637 w-digit display
- CYT1100 Encoder knob
- 5V controllable Relay
Turn the knob to the desired minutes of runtime. Press the knob to start or stop the timer. After rapidly flashing the minutes, power is enabled and the device counts down. Once time runs out the power is turned off.