Ultrasonic Movement Detector Kit – CK0203
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.
- Main Board: L: 2-3/4″ W: 1-15/16″ H: 3/4″
- Sensor Board: L: 2-3/4″ W: 7/16″ H: 3/4″
- Requires 9 Volt Battery (or Use this Power Supply instead of a Battery)
- Sensitivity user adjustable.
- Has a range of 12 to 22 feet.
- Electronic Kit – soldering required