This Long range Infrared transmitter can emit pulsed IR rays up to 10 meters. This IR transmitter is ideal to use in Infrared receivers using Phototransistor or Photodiode as IR sensor. The circuit is ...

The transmitter and receiver circuits of the infrared alarm ... adjust it for optimum range). The receiver is equally simple and also based on a CMOS 555. As long as the sensor picks up infrared light ...