DIY HV Variable capacitor

This amplifier is so high quality that it would be understatement to speak HIFI amplifier....

This circuit uses LEDs to display the beat frequency of two-tone oscillators. Only one LED is on...

An LM556 dual oscillator/timer, U1, configured as a two-tone oscillator drives U2, a dual4-watt...

This circuit was designed to charge NiCad battery packs in the range of 4.8 to 15.6 V from a...

This page is going to describe the parts, schematic, softw1are, and some tips on using Infrared...

A simple technique for measuring frequencies over quite a wide frequency range and with...

Seems to me it uses at least as much power and at least as many components as a 4 channel...

This design allows to operate two intercom stations leaving the operator free of using his/her...

The circuit is composed of the parts below: (1) infrared emitterThe multi-harmonic oscillator is...

The full circuit diagram for the audio sine-wave generator is shown. Resistors R1 and R2 bias the...

The Command radio is a description of the radio function, rather than a specific model. The...

Power outages after the call prohibit re-closure circuit, can avoid the use of electrical...

As it can be seen from the figure, + DC Solid State Relay (SSR) of the input stage is an...

Digital display clock signal source circuit shown in the figure is taken from a multi-point...

Figure (a) shows the circuit as a voltage follower, it is a special case of the in-phase...