This circuit was found in the January 1980 issue of Radio Electronics magazine. It is a digital slot machine using common logic circuits. It can still be easily assembled today.
Found in Popular Electronics from the 90s, this circuit serves to indicate the output level of a...
Found on an Elektor from the 90s, this TTL circuit generates a predetermined number of pulses with a...
This small Hartley oscillator uses an output transformer for transistors. The frequency is...