Free Circuit Diagram

This low drop out (LDO) voltage regulator need only few components, with very low noise and very low drop-out voltage. The circuit illustrated in the schematic diagram below gives a fixed 2.77 volt output, but this output voltage can be adjusted using two additional resistors. This circuit capable to supply 300 mA load [...]

This video is tutorial how to use oscilloscope. This video shows how to use the oscilloscope. The first thing to do is prepare the probe, the simulator generator and the simple circuit. And then turn on the oscilloscope and calibrate the oscilloscope. From the oscilloscope we can obtain some information, such as the voltage of [...]

Using a single supply quad comparator LM339, LM239, LM2901, LM2901V, NCV2901, or MC3302, we can build a square-wave oscillator with simple circuit and formula. Here is the schematic diagram: This circuit is suitable if you need  many square-wave oscillators in one circuit, since the quad packaged comparator provide four comparators in one single  [...]

Building electronic circuit tutorial (DIY: do it yourself project) is presented in this video. You can learn the basics about schematics and how they are used in electronics in this free home maintenance video.

This is a video tutorial about breadboard. This video shows how to make a simple circuit on the breadboard. In this video, the circuit that is build on the breadboard is a simple LED light circuit. It require a LED light, a resistor and two cable. Here is the video : The [...]

In this video tutorial,  you can learn how to make a LED flasher circuit using 555 IC. The project uses a breadboard, so you don’t need any soldering work. A good start for do it yourself  (DIY) project. [Video tutorial source: Youtube.Com]