This simple chime may be installed at gateways or doorways. It detects a change in the light level such as coming from a source on the opposite side of the walkway. A familiar ding-dong sound through the supplied speaker will both welcome the visitor and announce an arrival.
- Power Supply : 4.5VDC @ 50mA(working)
- Sensitivity of photo-transistor : On-board potentiometer
- PCB Dimensions : 69.3mm x 40mm x 20mm (2.73″ x 1.56″ x 0.8″ )