A simple electronic thermostat. Displays the temperature as two digits on 7 segment LED display. Temperature setpoint is entered by rotary encoder. There are two modes. 1) Setpoint hold: Rotate knob to display the desired temperature and press the knob to enter the temperature set point. DP1 lights when relay is closed. 2) Bypass: Rotate knob to select a temporary setting (don't press the knob). After 4 seconds, the temporary setpoint is active for 1 hour. DP2 blinks while in the bypass mode. Cancel the bypass mode by rotating the knob to enter a new setpoint and press the knob to enter. Depressing the rotary knob will momentarily display the current setpoint. Processor: PIC16F18855, control algorithm is a simple on/off threshold control with 2 degrees of hysteresis. Sensor: MCP9700A, 10mV/C Link to project: af6ea.blogspot.com/2017/02/simple-electronic-thermostat.html