Two Trimmer Potentiometer Low/High Ref.Adjust Relay Switch 230V AC 7 Amps Relay Normally Output and Normally Closed Output Window Detector Voltage Span 0-12V PCB dimensions: 53.56 x 16. Features Supply 12V DC Two Trimmer Potentiometer Low/High Ref. LM358 op-amp used as comparator, it circuit works with 12V DC supply and consumes 50mA current when Relay is in ON state. LM358 op-amp used as comparator, it circuit works with 12V DC supply and consumes 50mA current when Relay is in ON state. One pot used to set the high voltage level and another one to set the low level voltage adjust. For this design, the reference voltages are generated with help of two Trimmer potentiometer. If the signal level is outside of the window, the output is high and Relay is in ON condition. Relay provides normally ON and normally OFF switch. If the signal is within the window, the output is low thus RELAY is in off condition and also LED is off. This circuit utilizes two comparators in parallel to determine if a signal is between two reference voltages. It employs two comparators to detect over-voltage or under-voltage condition. A window detector circuit, also called window comparator circuit or dual edge limit detector circuit is used to determine whether an unknown input is between two precise reference threshold voltages. Winning circuit module: compared with other similar products on the market, this circuit module has better conductivity and high reliability.
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