This 4-voltage power supply using zener diodes has a maximum recommended current of 25 mA. The circuit was found in the May 1966 Radio Electronics magazine.
We found this telephone amplifier in a European publication from the 1980s. The transistor can be...
In figure 1 we have an application for NLAS5113, a new device from on Semiconductor...
We found this circuit in a Popular Electronics from the 90s. Transistors can be modern...