Reddit reviews Timer Relay, Countdown Timing Timer Delay Turn OFF Relay Switch Module with LED Display DC12V
We found 1 Reddit comments about Timer Relay, Countdown Timing Timer Delay Turn OFF Relay Switch Module with LED Display DC12V. Here are the top ones, ranked by their Reddit score.
【High Quality】It is a timer relay countdown off module with high precision, stable and reliable performance【Trigger Connect】Trigger to connect, and will disconnect after delay time; if trigger during delay time, it will disconnect immediately【Multi-mode】Normally the module will start to work when triggered, if you need module to work immediately after power on, connect 2 terminals of trigger【Wide Time Range】There is a wide time range, the delay time is adjustable from 1 second to 99 seconds, or 1 minute to 99 minutes; use a jumper to select second/minute【LED Display】Designed with a LED display that will show the delay time
The off-the-shelf stuff can be pretty darn cheap...
https://www.amazon.ca/Countdown-Timing-Switch-Module-Display/dp/B07WRDN2P9/ref=sr_1_14?keywords=relay+with+timer+9v&qid=1571185836&sr=8-14