Hello. Does anyone know of a good 5v DC timer switch? I need it to block voltage for about 1 or 2 minutes and after that let all voltage through. I don't want something that resets and repeats. I need it to keep an annoying siren from sounding for a couple minutes while things calibrate. Thx.
Google is your friend
I found a lot of delay relays on google but after exhausting search came here. I need something that acts only as a timer switch one time and then is always on. I thought there might be someone here who had used a component like this.
It’s called a “D on E” or delay on energisation relay, often shortened to delay relay . Once the time period is over the contacts make and then stay made until power is removed .
One that goes on then off is a cyclical timer. One that de energises after a time after the power is off, is a delay on de energisation .
Oh thank you very much. I will look for one.
Found them. But in the interest of having my alarm system working tonight I was able to get it working with code. I didn't think a delay command would work as I thought that it would just delay the HCSR501 from calibrating until the delay was over. Turns out it calibrated during the delay and I did not have to hear a siren going off. I just put this in the beginning of the setup. "delay(1000);" I'm testing it a second time now. It's working great. Any would be burglar with be thoroughly shaken.
Oh and I changed the 1000 to 250000.
Always the XY problem. Sigh. 