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I bought 4 of these for some small projects. I needed a delay shutoff of about 25 seconds, or more. The longest these will delay shut-off is 12 seconds, no matter how many turns I make on the adjusting screw. I checked two of them, same result. Its still a great price and I am a still a big fan and will continue to order components for my tinkering and use these on another project. Thanks All Electronics!
[Note from All Electronics: Thanks for the review. We have tested them out here, and are able to get up to the 25 second delay - not sure what the issue is with the one's you received. The only guess we have from our tests is... keep turning]
Bought this relay to control an alarm horn, but I don't have the mini-USB cable to power it. Before I get one, can this be controlled with an input signal like other relays? [Answer: no]. Or is the only way to change the state is by pushing the button? [Answer: Yes - it's a stand alone unit]
If you can use an input signal, which wires on the USB are used? Thanks!