We found this circuit in a 1972 documentation. However, it can be assembled with more modern transistors like the BD135s which are NPN. The collectors are connected to the CR1 diode which may be a 1N4002. The circuit drives an optical coupler.
We found this circuit in a 1972 documentation. However, it can be assembled with more modern transistors like the BD135s which are NPN. The collectors are connected to the CR1 diode which may be a 1N4002. The circuit drives an optical coupler.
