The circuit uses a matched pair of 40Khz transducer elements to detect movement out to about 22 feet. You may add a relay (not included) to switch a heavy appliance etc.; the unit switches just an LED as supplied. The circuit can be switched to latch on. A
Flash Sale Ongoing
The circuit uses a matched pair of 40Khz transducer elements to detect movement out to about 22 feet. You may add a relay (not included) to switch a heavy appliance etc.; the unit switches just an LED as supplied. The circuit can be switched to latch on. An ideal alarm circuit that cannot be easily fooled.
Reviews
There are no reviews yet.