This basic CMOS 4001 circuit was found in the April 1976 issue of Radio Electronics magazine. The circuit generates rectangular signals, and the components can be changed to obtain other frequencies.
An oscillator whose frequency can be adjusted between 500 Hz and 5 kHz with the use of a...
This circuit was found in Motorola documentation from 1969. The transistors are from that time. The...
This circuit brings together in a single set a preamplifier and an equalizer with several inputs. The...