IR based security alarm circuit can detect any movement and trigger the alarm. This circuit is very useful in homes, banks, shops, restricted areas where an alert alarm is needed on any movement. This ...

Fig. 2: Infrared Burglar Alarm: Receiver circuit The IR transmitter and receiver units are mounted opposite to each other on the sides of entry door or gate. When the invisible beam between the ...

IR Proximity Detector Circuit. The signals sensed by the phototransistor of the sensor are amplified by transistor pre-amplifier T2. These are further fed to a power amplifier based on IC LM386 to ...

This circuit is presented as an alternative to the IR beam break detector featured in the June 2009 issue (Silicon Chip). In order to make it relatively insensitive to ambient light, it uses a ...

Circuit simulation made easy. A free online environment where users can create, edit, and share electrical schematics, or convert between popular file formats like Eagle, Altium, and OrCAD. Transform ...