Using the LM3909 this circuit was found in the January 1992 issue of Radio Electronics magazine. Resistor R1 should be chosen according to the table given next to the diagram.
This circuit was obtained in a Popular Electronics of the 90s. The circuit can be assembled with...
This circuit was found in the July 1990 Radio Electronics magazine. It is based on the 3-digit...
June 2017 - Kemet T521's new high voltage capacitors with capacitances up to 330 uF and voltages...