WANNA CHALLENGE?
Try and find an adjustable high and low voltage 120vac alarm? I can't even find an outage alarm for use with UPS that gives a discreet "chirp" every so often when on battery.
Forum Discussion
Really what I need is a nine volt chirping piezo. One chirp every 30-seconds. Sounds like project box 555 and find a piezo time. I have the mini 120 vac DPDT relays and lithium batteries. Maybe go rechargeable. Man there has GOT TO BE a nine volt interval piezo chirper out there!
