This circuit provides an audible signal when testing a TTL circuit. The circuit is from an old documentation, being fed with the 5V of the circuit under test.
Two inverters of a 4069B type CMOS integrated circuit form this oscillator which is characterized by having...
) This interesting circuit of 18 multiplexed LEDs was found in the February 1992 issue of Radio...
Found in a May 1968 Supertena newsletter in Popular Electronics magazine, this mid-waveband...