Low Voltage Control (CB21155E) This low voltage power control was found in a Popular Electronics from the 90's. The MOSFET can be almost any type depending on the load current. It must have a heat sink. a hre

5 to 200 V Flasher (CB25427E)
Using the LM3909 this circuit was found in the January 1992 issue of Radio Electronics magazine....
Dynamic Microphone Preamplifier (CB4730E
) This two-transistor circuit features excellent gain operating with low impedance microphones. The...
Digital Audio Switch (CB12058E)
This circuit was found in an English publication in 1986, but it can still be implemented by...

Low Voltage Control (﻿CB21155E) This low voltage power control was found in a Popular Electronics from the 90's. The MOSFET can be almost any type depending on the load current. It must have a heat sink. a hre