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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...
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    PIR switching relay problem

    Still have issues I had to leave the project for a while, but now on it again. I tried a 100k resistor without success. Just for the heck of it I rigged up a 60w lead lamp across the relay coil terminals, and that worked like a charm. When the PIR goes off, the relay drops out without issue...
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    PIR switching relay problem

    Hi, once again I haven’t explained too well. When I said standard PIR I meant the exterior type which are meant for security lighting, with a variable time output (light on), dawn/dusk etc. They will cater for up to 2000W, but in this case all I have on the load is the relay I mentioned. I will...
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    PIR switching relay problem

    Thank you for the replies. Duke, it is a 230VAC small plug in type (OMRON) new relay. Harald, I am using a 230V AC (coil) relay. The purpose is to supply a switching contact for a input to a PLC which is 24V. The PIR that is supplying the relay coil is a standard DIY type, and it did say...
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    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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