This file type includes high-resolution graphics and schematics when applicable. Measuring the low frequencies that are common in many real-world situations, such as biomedical or speedometer ...

Editor's Note: Here's another take on the transformerless AC line power supply, which finds use in some well-insulated, low-power devices. Our technical reviewer pointed out that C ac should be an ...

The circuit can be used for decorative lights. IC1 (555) is used in astable mode to generate clock signal for IC2 and IC3 (CD4518) which are dual BCD counters. Both counters of each of these ICs have ...

This monostable output is given as clock to dual up-counter CD4518 (IC2). IC2 increments on every positive edge of the clock, giving a BCD output on pins 3 to 6. The purpose of NE555 timer is to ...