This audio frequency switched relay board will activate the onboard relay when the module detects the user-set input frequency from 2 KHz -15 KHz.
The trigger frequency can be adjusted from 2 KHz -15 KHz 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 ±150 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
|Power Supply Options
|Power Supply Module: CFE103 or
UK Plug Power Supply: 660.446UK with connector 777.001UK
|10mA min - 75mA max
|Trigger Frequency Range
|2 KHz - 15 KHz
|Detection Frequency Deviation
|Input Voltage Range
|100 mV - 3V p-p
|1 x SPDT Relay
|Up to 240Vac or 28Vdc @ 3 Amps max. (Relay Datasheet)
|NO, NC, C (Relay FAQ)
|70 x 45 x 30 mm
|PRE-ASSEMBLED Electronic Module
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