This is a battery powered 3W power amplifier using germanium transistors. The circuit is from an English documentation from 1967. The transistors are from the time.
This one-digit TTL modulus for 7-segment display can be parto f digital projects. Many of them can be...
Radio Electronics magazine published in a 90's issue this simple alarm that can use any general...
The basic application of a 4017 as a sequencer [10 steps] is shown here. In this same part, you...