The circuit shown consists of a power stage for relay excitation. 2N3053 can be a BD135 and 2N406 can be replaced with a BD136. R3 depends on the trigger voltage.
This circuit produces a single pulse whose duration depends on the capacitor. The circuit is from an...
This circuit shows how a simple one-transistor stage can be used to Power high current loads from...
Using the well-known CK722 and also the CK721, this signal follower or tracer was found in Radio...