We found this circuit in the June 1988 Radio Electronics magazine. The power supply must be symmetrical.
Luminus SST 20 Deep Red LED Mouser Electronics is announcing in its stock the SST-20, a 60%...
We found this circuit in a 1965 Electronic Design. Transistors are still common but admit...
This simple circuit, suggested by 1969 documentation, has already been featured in other articles...