This oscillator provides a sinusoidal signal and can be applied to other operational amplifiers. The stabilization is done by diodes and for the indicated component values the frequency is 1 kHz.
We found this simple frequency meter for low frequencies in an English publication from 1978. The...
This circuit is indicated for the control of resistive loads. When S1 is opened, the triac turns on...
A VCO or voltage-controlled oscillator, which uses only two of the LM3900 amplifiers, is shown in the...