This simple 6 V source stabilized by zener diode was found in a European technical publication from 1972, but it is current for its simplicity and the components it uses.
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...