Categories
Contdown 7 segment displays
Based on the Countdown with LCD 2x16, we have made this variant of the countdown. The countdown circuit, or the backwards counting we shall describe, shows the visualisation of the backwards counting on four 7 segment displays.
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.
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.
On-off sequence of three relays with a push button
On-off sequence of three relays with a push button, microcontroller PIC 12F675.
How to use the PC like an oscilloscope
With this simple tutorial we’ll construct an entrance to the computer to make it usable like an oscilloscope. We shall transform our PC into oscilloscope.
Speaker protection circuit
This circuit is made to protect the speakers from the "pump" inconvenience, that is produced in some amplifiers while they are on.
Digital clock with pic
Digital clock with pic 16F84A.
Vu meter stereo
This simple circuit is based on the well-known integrated circuit LM3915.
Digital Ammeter
This circuit is made up of two integrated circuits: an analogue to digital converter (CA3162), and a decoder of seven segments (CA3161).
Current clamp
Current clamp with a microcontroller.
Automatic Pc power on
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).
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