We found this circuit in an old American documentation. SCRs can be modern equivalent types. The transformer has a 5 A current, according to the SCRs.
Found in a Motorola documentation from the 70s, this circuit makes use of transistors of the time....
This is one of many Morse code audio oscillators that can be found in this section. The circuit...
Here we have the way to activate two common cathode displays with 4026 integrated circuits. The...