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Digital clock with display
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.
2X100W amplifier
2X100W amplifier STK4231II rn
Proximity sensor power on for Pc
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.
2x30W amplifier
2x30W amplifier TA8220. rn
Led clock circuit
This led clock circuit is quite complicated to assembly, because of the great quantity of connections it has, but the result is quite visible.
"Eagle" software ground plane tutorial
When we have an audio circuit, it is necessary, for the better shielding, and to avoid unnecessary noise, to create a ground plane.
Digital voltmeter with LCD
With a simple circuit and a microcontroller pic, 16F873A model, we designed this digital voltmeter in addition to any power source.
How to turn on atx power supply
It’s quite simple to use, as a normal power supply, the PC power supply when we need 5 or 12 volts, which are the powers given to us by connectors from the power source ATX.
Integrated circuit CD4040
The integrated circuit CD4040 is a programmable divider. Its mission is to divide the present frequency in pin 10.
Power supply arrangements
That power supply may be configured, because depending on our voltage regulator, we’ll get more and less current at its output.
Beep codes
This information can be useful when there is a problem in turning on the computer. When we start the PC, we can hear several “beeps” which show us how our hardware is.
Full wave precision rectifier
This precise full-wave-rectifier is a circuit made to rectify those values that a normal bridge rectifier cannot rectify.The diminution of the diode bridge rectifier’s typical power is (obviously, it depends on the type of the diodes) of the 0,7 volts-an approximate value.
Circuits
Circuits made with a professional design program
Tested
All circuits described have been tested
Tutorials
We extended the tutorials section periodically
Scalextric
Circuits of two and four cars made with design program
Photos
Scalextric photos