This circuit was obtained in a 1977 technical documentation. The PUT admits equivalent and the modulating transistor can be the BD136. The ground transistor can be 2N2222. The LED can be of high-power infrared.
This circuit was obtained in a 1977 technical documentation. The PUT admits equivalent and the modulating transistor can be the BD136. The ground transistor can be 2N2222. The LED can be of high-power infrared.