I would like to know how to make a circuit that will close a dry contact (small relay) for maybe around 200ms to 500ms or so, on hearing a loud noise (with sensitivity control). Preferably with a small lead mic, that can be positioned to suit, away from the PCB.
There are many sound activated kits available, but basically I need one that is just for a “dry pulse” trigger, with a low latency, which will then be used for a PLC input. Most are latching, or have long "on" periods. I will have a 24v (not sure either AC or DC supply) for the plc, so if the circuit could be powered by the same, it would make things easier.
I’m not an electronic buff, but can solder/construct, if I know which components to use. I would be so grateful for any help on this, as I have tried for ages elsewhere to find this info, to no avail.
Thank you so much.
There are many sound activated kits available, but basically I need one that is just for a “dry pulse” trigger, with a low latency, which will then be used for a PLC input. Most are latching, or have long "on" periods. I will have a 24v (not sure either AC or DC supply) for the plc, so if the circuit could be powered by the same, it would make things easier.
I’m not an electronic buff, but can solder/construct, if I know which components to use. I would be so grateful for any help on this, as I have tried for ages elsewhere to find this info, to no avail.
Thank you so much.