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    Sound actuated relay help request.

    Thank you in advance. I'm wanting to build a small number of circuits (six min), which have the following attributes. A relay which actuates (dry contact) for a very brief period (like a keystroke) when activated by a single loud noise, like a hand clap. The sensitivity must be adjustable, and...
  2. G

    PIR switching relay problem

    Could anyone advise me please. I have a external PIR which I am using to switch on a small din mounted 230V relay (for the contacts of a PLC). The problem is, although the PIR is only on for a few seconds, as the time on is at its lowest setting, the relay still holds in. I suspect that this is...
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