This circuit is used for switching a computer or any other device which start operating by a click, after a blackout (when power is restored).
We present you a retro assembly. This circuit was absolutely necessary years ago for us to listen to our vinyl discs. We all know what a preamplifier is, but what about R.I.A.A? R.I.A.A is a “Recording Industry Association of America”.
Single channel power amplifier with excellent audio quality. Applications in portable radios, tv sets, cassette recorders, interphones, and wireless tranceivers.
Twilight switch with 12F629 microcontroller .
This led clock circuit is quite complicated to assembly, because of the great quantity of connections it has, but the result is quite visible.
That power supply may be configured, because depending on our voltage regulator, we’ll get more and less current at its output.
This circuit is based on the infrared receiver IS471F. The running principle of the circuit is easy.The transmitter is an infrared LED that emits a modulated signal monitored by the 4-pin of the IS471F.
This circuit is made to protect the speakers from the "pump" inconvenience, that is produced in some amplifiers while they are on.
The LM4861 is a bridge-cennected audio power amplifier capable of delivering 1.1W continuous average power to an 8 ohm load with 1% THD+N using a 5V power supply.
On-off push button with a 12F675 microcontroller.
This clock is for nostalgic people from “another electronic age” (without microprocessors). It’s a digital “old fashioned” clock and it’s already seen too many winters.
With the familiar LM338K voltage regulator and a high-powered transistor, the 2N6031, we have set up a powerful 10-amp variable power supply.