RoboJax Arduino Relay Timer with LCD1602-I2C V1.1

RoboJax Arduino Relay Timer with LCD1602-I2C V1.1

This code uses an Arduino as a timer to control a relay with a potentiometer and an LCD1602-I2C. You can set it from 0 to any number of seconds. There is virtually no limit. Fig. 1 Schematic diagram for Robojax Relay Timer V 1.1 with LCD1602-I2C To have finer control over the time setting, especially for times above 100 seconds, use two potentiometers with values in a 1:10 ratio (one is 10 times larger than the other). For example, for coarse control, use a 100kÎ© variable resistor and for fine control, use a 10kÎ© resistor, and connect them as shown in Fig. 2. Fig. 2 Wiring of fine and coarse control for two potentiometers