Found in a Popular Elecronics from the 90s, this circuit appears in other versions in this section and on the website. The circuit draws one of 10 LEDs and has a sound effect produced during the draw.
An stable multivibrator with 50% of duty cucle can be mounted using the 555 as shown by the...
This circuit generates sequenced pulses to control a stepper motor. The speed at which the pulses...
In the figure we have the basic configuration of a function generator with two operational ones,...