Thread: strange problem with dawn to dusk sensor
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Bill Wright[_3_] Bill Wright[_3_] is offline
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Default strange problem with dawn to dusk sensor
On 20/04/2018 03:35, wrote:

Do they switch using relay or triac?

There's an audible click then the 30 sec pause, then the lights go on/off.

Either way your 12v psu (if it's an smpsu) has a biggish capacitor on its input which will produce high peak currents at switch-on.

Yes. There's a big inrush. A big spark!

Bill
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