Simulated TTL gate (CB24885E)

This is the common transistor version of a TTL inverter gate. The transistors are general-purpose and the power supply must be 5 V.

Triac 0 to 30 V power supply (CB18509E)
This adjustable direct current source circuit uses a triac operating as a variac. The circuit is...
Crystal Calibrator (CB3893E)
With the precision given by the crystal this circuit provides signals of several frequencies for the...
Amplifier For Magnetic Phonocaptor (CB9514E)
This amplifier allows you to recover recorded tapes from a tape player that has the mechanism in...