This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V and other frequencies can be generated with capacitor replacement.
This bar or moving point indicator (bargraph) employs the LM3914 and can excite 10 LEDs, of any...
This circuit is from a PE Hobbyst Handbook from 1991. The integrated circuit is a common 555 and...
This circuit was obtained in an Electronics World of 1968. The operational amplifiers ones are...