|
(Click Picture to Enlarge)
diy k20 |
Ultrasonic
Movement Detector Kit
The circuit uses a matched pair of 40 kHz transducer elements to detect
movement up to 22 feet away. You may add a relay (not included) to switch higher voltage
loads. The unit switches a LED for movement indication. Sensitivity is
adjustable via
control. Crystal locked circuit for maximum stability. A good circuit for detecting
intruders, pets, etc., and then turning on a light, alarm bell, etc. 9 volt battery
operation - DIY Kit 20.
Specifications:
See
CK203.pdf for complete
details, including schematic and theory of operation. Requires Adobe
Acrobat Reader available at
www.adobe.com
for FREE!
Transducer spec sheet here as
ck203transducers.pdf
|
