This simple 15 V power supply was found in an article describing an assembly in the January 1987 Radio Electronics magazine. The power supply is used to power the circuit described.
We found this circuit in a 2005 Linear Technology manual. The resistor is calculated for the...
The frequency of this circuit is determined by the 100 uF capacitors. These components can be...
This circuit appeared in the July 1969 issue of Radio Electronics magazine. The sensor is an LDR....