A simple, yet over-engineered, timer and temperature probe for film development/darkroom processes.
- SparkFun Pro Micro 5V/16MHz or similar
- DS18B20 Digital Temperature Sensor
- TM1637 4-Digit 7-Segment Displays (with colon and with dots)
- 74HC4067 16-Channel Analog Multiplexer Demultiplexer
- Couple of buttons, rotary encoder
- Simple buzzer