Capacitors and the 555 Timer

A circuit utilizing a standard digital quartz electronic watch, with its crystal soldered, forms a digital frequency meter as illustrated by the connected circuit. The test signal is applied to the E and F sides via components such as...

This circuit controls intervals of up to 1 hour in 1-second increments, as programmed by thumb wheel switches S1 and S2. It consists of a two-stage programmed counter driven by a 1-second clock derived from the 60-Hz power line....

Basic Oscillator (Tone Generator) at 1.8 kHz using IC 555. This circuit features an astable oscillator configuration built around the 555 timer IC, generating an alarm tone of 1.8 kHz that directly drives a speaker. This is a fundamental...

A USB powered device with multiple integrated circuits (ICs). It is standard practice to use a combination of various range capacitors for decoupling each individual IC, with the smallest capacitors placed as close as possible to the ICs and...

The figure illustrates the automatic watering control circuit for bean sprouts. The controller includes a step-down rectifier circuit, a power outage detection component (IC3), a timing control circuit (IC1), and a temperature control circuit (IC2). The step-down rectifier circuit...

This very simple circuit just uses a couple of resistors, a capacitor and the easily available 555 timer IC. The 555 is setup as an astable multivibrator operating at a frequency of about 1kHz that produces a shrill noise...