Circuit Innovations

Circuit Innovations

24 Leasmires Avenue

Easingwold

York.  YO61 3DU   UK

Kits and Products > Twin Voltage Comparator Circuit

A pair of simple voltage comparator circuits on one PCB which can be set up to work as two independent circuits or as a combined 'window' comparator.

Handy for use as a simple thermostat, light activated switch or level detector.

Supplied with a pair of temperature sensors and a pair of light sensors to get you started.

Each circuit consists of a simple voltage comparator circuit with a screw terminal input for a sensor of your choice. The circuit has an adjustable multi-turn pot to set the trip point at which the relay switches over. A jumper link selects whether the relay turns on above the threshold voltage or whether the relay turns off at the threshold voltage.

Each circuit operates independently, apart from a shared 12v supply.

The relays are rated to switch mains voltages at currents up to 5A. PCB track thicknesses, clearances and screw terminals are designed for these levels.

 Features

Supplied with full instructions, circuit description and examples