The MK120 IR Light Barrier SELF-ASSEMBLY electronic kit allows you to build your own infrared light barrier comprising a transmitter board and matching receiver board with onboard buzzer alarm.
The transmitter uses two IR LEDs to emit an infrared beam. The receiver is positioned so that it picks up the beam. The receiver activates the alarm and illuminates the LED if an object moves between the two boards and breaks the beam. The alarm turns off and resets automatically when the beam to the receiver is restored.
The system can be used to announce visitors, warn against intruders, set boundaries, act as a bedroom alarm, educational project,...
Provides a good introduction to electronic kit construction. Soldering required.Features
|Supply Voltage||Transmitter: 9Vdc / 50mA max.|
Receiver: 9Vdc / 20mA max.
2 x 9V battery holders and adapter jacks included
|Power Supply||2 x PP3 batteries (Order Code 656.020UK)|
2 x 9Vdc mains adapters (Order Code 660.444UK)
|Output||audible (85dB) and visible (LED) alert|
|Range||1 to 4m (3.3ft to 13ft)|
|Board Dimensions||Transmitter: 55 x 40mm (2.2" x 1.6")|
Receiver: 100 x 50mm (3.9" x 2.0")
|Product Format||SELF-ASSEMBLY electronic kit (KT) Product Formats Info|
|Documentation||Velleman MK120 Assembly Manual|
Velleman MK120 Receiver Circuit Diagram
Velleman MK120 Transmitter Circuit Diagram