The Comparator Click Board™ from MikroElektronika is a voltage comparator on a Click Board™ add-on board carrying an LM2903 chip. This LM2903 IC features two independent voltage comparators, two pairs of screw terminals (additional two screw terminals are for GND connections), and two potentiometers.
It can be used with either a single or dual power supply over a wide range of voltages. The screw terminals allow the user to connect separate inputs, while the two potentiometers, placed between the screw terminals and the IC, configure the setpoint voltage. Each input has its own interrupt pin on the socket, i.e., one through the MikroBUS INT pin, the other in place of the default MikroBUS AN pin.
The Comparator Click Board™ is designed to use either a 3.3V or a 5V power supply.