Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the capacitors used. The circuit is from a Radio Electronics from December 1989.
This circuit is from an 80's publication. The basic components indicated are of the time, mainly...
Found in a 90s Silicon Chip documentation, this circuit provides a current of 3 A and the voltages...
This circuit was found in a 90s Popular Electronics. It is used for the acoustic transmitters of 40 kHz,...