This benchtop power supply with various output voltages from 1.5 to 12 V was found in Radio Electronics magazine from August 1960. The circuit uses power transistors of the time.
Found in a 1968 American documentation, this circuit generates sawtooth signals whose rise and...
This TTL siren is formed by two oscillators using each two Gates of a 7400. Frequency or the...
Although it is a circuit from the 80s, it can still be easily implemented today because the...