![Amazon.com : Taidacent 24V Audio Signal Trigger Relay Module Sound Sensor Sound Delay Input Audio Signal Relay Control Switch Performance Stable : Electronics Amazon.com : Taidacent 24V Audio Signal Trigger Relay Module Sound Sensor Sound Delay Input Audio Signal Relay Control Switch Performance Stable : Electronics](https://m.media-amazon.com/images/I/51i6ayN7s2L._AC_UF894,1000_QL80_.jpg)
Amazon.com : Taidacent 24V Audio Signal Trigger Relay Module Sound Sensor Sound Delay Input Audio Signal Relay Control Switch Performance Stable : Electronics
![How can I use audio signal to actuate relay (or close dry contact)? - Electrical Engineering Stack Exchange How can I use audio signal to actuate relay (or close dry contact)? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/70BMi.gif)
How can I use audio signal to actuate relay (or close dry contact)? - Electrical Engineering Stack Exchange
![Taidacent 24v Audio Signal Input Trigger Relay Sound Sensor Delay Relay Control Sound Switch Circuit Voice Control Delay Switch - Buy Audio Input Trigger Relay,Sound Switch Circuit,Voice Control Delay Switch Moudle Sound Taidacent 24v Audio Signal Input Trigger Relay Sound Sensor Delay Relay Control Sound Switch Circuit Voice Control Delay Switch - Buy Audio Input Trigger Relay,Sound Switch Circuit,Voice Control Delay Switch Moudle Sound](https://img.alicdn.com/imgextra/i1/6000000004718/O1CN01HYaAED1kitCYUOban_!!6000000004718-0-tbvideo.jpg)