This circuit was obtained in a 1980s publication, but it can be easily assembled today, as all components are common. The transformer is 12 + 12 V with at least 1 A and the diodes 1N4002.
The circuit shown is from the Texas Instruments optoelectronics manual, applying to low power...
This pulse width modulator is from the SGS Integrated Circuits Manual 1982, the operational can be...
We found this circuit in a 1977 Radio Handbook. The lamp is the critical component, being 120MB at the...