The oscillator or the frequency generator, By most popular use NE555 or transistors or various gate. The output frequency setting depend on the resistance or capacitance As well as use the crystal control or frequency to the circuit. The frequency generator will see that has Designs commonly used in an electronic circuits, specifically the digital […]
We like to collecting the electronic circuits with PCB layout as ideal of building the Easy electronic projects, under different scenarios.
The projects are mostly old but still works great. Suitable for use or to study.
Now, We have a lot of articles(over 600 circuits). So, difficult for find the circuit as you need. It is a pity if you close this site without the great experience.Recent New Posts
I use old laptop also old ubuntu version as I can not use new flash on firfox. Since cannot install new version. (Before use V.10). Now I so happy I can install new flash on firefox. 1. Check your version flash from : http://www.adobe.com/software/flash/about/ 2. Download new from : http://get.adobe.com/flashplayer 3. Then put and extract […]
This is a simple metal detector circuit, Can find various metal and adjustable sensitivity Easy to use to place near metal. The circuit inside include a few components has IC-NE556 is at the heart of the circuit, with principle of Monostable multivibrator then show on Moving Coil Type Meter. The working principle This project use […]
This is a TV test pattern generator with wireless model The components in assemble circuits not difficult, can transmit signal in wireless are video and audio As horizontal line. Along with tone. Using the power of just one 9V battery. This circuit is very suitable for TV repairman orThose who want to test that your […]
Door Guard Knob Alarm circuit. This is Door Guard Knob Alarm circuit with touch system. When thief caught on the door handle, makes it sound an alarm once. Use the the detector capacitance within the body.This project is a small and economical. Ideal for travelers or those who want security. How does it works The […]
A application a signal amplifier circuit specifically the AC signal amplifier in common electronic circuits. The most these amplifiers will fed back some signal to the input again. To reduce amplify rate down affects to reduce a distortion rate and reduce also the noise signal. The feedback signal may through resistor, transistor or diode Depends […]
This is mini switch system that is controlled light-activate. Which use the inverter gate IC-40106 as main components in compare and controlled switches, and common phototransistors as sensors The Operation of switch has several forms. The most basic way is to press the switch directly. If modern must be controlling by Infrared light or remote […]