Found in July 1975, Radio Electronics magazine this circuit can use any operating circuit, including the 741. The circuit must use a symmetrical power source.
A VCO or voltage-controlled oscillator, which uses only two of the LM3900 amplifiers, is shown in the...
In this circuit the 555 is configured as an adjustable timer for long intervals. The capacitor C1 can be...
June 2016 - It can be obtained from Mouser Electronics this new chip for motor control, motion,...