This audio frequency switched relay board will activate the onboard relay when the module detects the user-set input frequency from 150Hz to 2KHz.
The trigger frequency can be adjusted from 150Hz to 2KHz using the onboard trimmer. The input voltage range is 100mV to 3V peak to peak.
The circuit is based around an LM567C tone decoder IC. The oscillator is very stable and has a maximum detection frequency deviation of just ±20 Hz when used with a high quality stable power supply. Switch mode supplies are not recommended.
An LED indicates that the relay is in operation. The board is reverse polarity protected. Screw terminal blocks for all connections.
Specifications| Supply Voltage | 12V dc |
| Power Supply Options | Power Supply Module: CFE103 or UK Plug Power Supply: 660.446UK with connector 777.001UK |
| Operating Current | 10mA min - 75mA max |
| Trigger Frequency Range | 150Hz - 2KHz |
| Detection Frequency Deviation | ±20Hz maximum |
| Input Voltage Range | 100 mV - 3V p-p |
| Output | 1 x SPDT Relay |
| Maximum Output Load (Resistive) | Up to 240Vac or 28Vdc @ 3 Amps max. (Relay Datasheet) |
| Relay Connections | NO, NC, C (Relay FAQ) |
| Current Consumption | 55mA |
| Dimensions (WxDxH) | 70 x 45 x 30 mm |
| Enclosure | WCAH2853 |
| Product Format | PRE-ASSEMBLED Electronic Module Product Format Info |
