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

126 MHz Logic Probe (CB21195E)
This logic probe was found in a Popular Electronics from the 90s. The circuit is TTL and must be...
Comparator for TTL (CB20142E)
The integrated circuit used in this configuration is not common today. The zener determines the...
Bipolar Transistor Crystal Pierce Oscillator (CB13084E)
The original frequency of the Pierce Oscillator with bipolar transistor is given by the crystal, which...

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