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 ...

Working of the circuit is simple. Initially, when no IR beam is falling on sensor TSOP1738, the relay remains de-energised and the toy car doesn’t move. When switch S1 is pressed, the IR beam falls on ...

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 ...

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 ...