Free Circuit Diagram

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]

This LED flasher give similar circuit with the previous transistor LED flasher, but this circuit use a 555  integrated circuit chip as the active component. Here is the schematic diagram of the LED flasher circuit: This circuit gives alternating LED flashing, but with different flashing period between LED 1 and LED 2. The [...]

A LED flasher circuit can be built using only one transistor and few passive components. This circuit is a proof of Negative Resistance (the Esaki or Tunnel Diode in from 1957) The Transistor is coupled / Biased in the Opposite polarity. [Video tutorial source: youtube.com]

This is a video of LED’s & Integrated Circuits Tutorial. This video shows how to make flashing box. to build a flashing box we need some tools and accessories, such as circuit board kit, UB5 size jiffy box, solder, soldering iron, and 9 DC battery. Before constructing the flashing box, we must plan about position [...]

This video is a tutorial of lamp dimmer using PWM. This video shows the use of PWM for lamp dimmer. In this video, the PWM kit uses a 555 IC. The brightness of the lamp is dimmed by changing the pulse. If we up the pulse slowly, the intensity of the lamp getting brighter. Here [...]

Testing whether a transistor is shorted or open usually done by ohm meter. You test if the base to emitter  or collector permit a current flow in one direction. Here is the circuit’s schematic diagram: The 555 timer ( IC1 ) operate as a 12hz  oscillator. The output of this oscillator (pin 3) [...]