This IR transmitter is ideal to use in Infrared receivers using Phototransistor or Photodiode as IR sensor. The circuit is a simple Astable Multivibrator using IC NE555. Resistors R1, R2 and capacitor ...

We must admit that we’ve been guilty of using a microcontroller to make ... Luckily, [Ray] published an illustrated guide on building multivibrator circuits. This is a simple method of ...