This simple logic test circuit with 3 LEDs was found in October 1985 Radio Electronics magazine. The power supply is according to the logic, and this version is indicated for TTL.
This traditional configuration from a simple 12 V source is from a 1977 publication. The...
This simple electronic organ with a tremolo effect was found in a 1981 publication, but it can be...
This circuit, with the LM3900 transconductance amplifier, has an adjustment to obtain zero output...