We found this circuit in an American publication from the 90s. It generates pulses that can be modulated in amplitude. The supply can be done by voltages from 5 to 12 V and the frequency depends on C1 and C2.
This control circuit up to 1 kW was found in a 1967 RCA documentation. The components are from...
We found this circuit in an Analog Devices documentation from the 1990s. It provides an...
In this circuit the signal from the phototransistor is amplified by a Darlington stage and then...