PC Circuits
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PIC18F4550 Communication with PC using USB HID Class, Visual Basic Communication xpress_embedo.... -
Here is a collection of (SMPS) schematic, datasheets, images and tips for switch mode power supplies using TL494/ LM339, KA7500 and IC2003.... -
Here are the datasheet and the circuit dram of a PC Switching Power Supply using the IC CG8010DX16.... -
The fan runs constantly in many PCs, which may not even be necessary. A simple controller circuit can regulate the fan speed according to demand. This not.... -
The PC processor generates very high temperature during its operation which is dissipated by the large heat sink placed above the processor. If the heat s.... -
This little circuit will help you to remove all surplus small ac mains adaptors from your desktop. The circuit is nothing, but a smart dc power box direct.... -
This circuit generates speed pulses from the speed-dependent voltage spikes generated by commonly used types of PC power supply fans, which are superimpos.... -
Here is a simple technique for measuring frequencies over quite a wide frequency range and with acceptable accuracy limits using a PC. It follows the basic technique of measuring low frequencies, i. e. at low frequency, period is measured for a complete wave.... -
For simple electronic circuits, it may be sufficient to get a qualitative insight on dedicated electrical signals. This interface circuitry allows to use the line-in input of a standard PC soundcard to be used as a 2-channel oscilloscope. This setup does not.... -
Data Collection - Analog to Digital Conversion and Communicating with a PC through the Serial Port Microcontroller Advanced Kit.... -
This PC fan controller circuit is designed with discrete components and is used to control 12 V fans that have a current consumption lower than 200mA. With the components values presented in the circuit diagram, the voltage won`t drop below 7V. If the fan.... -
This little PC Watcher circuit will help you to prevent unauthorised access to your personal computer. After construction on a small piece of veroborad, en.... -
Most of the PC desk lamps available in the market light up whenever there is an input power. These don`t take into account whether there is a real need for.... -
If you know some language of programming as C +, PASCAL, VISUAL BASIC, DELPHI etc you can write a program which will send in the parallel door (378 I) of PC a number from 0 until 255 checking thus the tendency of expense of simple D/A of converter (that it.... -
This joystick model was presented by IBM together with their first IBM PC computer. The joystick is just a basic analogue joystick with two buttons. The original joystick interface had circuit for connecting two joysticks, but had only one joystick.... -
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The GLMDPCB motion detector board is a double sided etched, screened and drilled printed circuit board designed for the GLMDA motion detector circuit shown in the schematic below. All or part of the circuit can be built. For some robotic and other special.... -
TNC and Modems ruled the world of digital communications until recently. With the advent of high speed computing and digital signal processing (DSP) all this has changed. If you own a home computer (PC) with a sound card, all you need to do is download.... -
The first time you sign into developerWorks, a profile is created for you. Select information in your profile (name, country/region, and company) is displayed to the public and will accompany any content you post. You may update your IBM account at any time..... -
This project article was originally written in 2004 when most computers had parallel ports. This is no longer the case, so much of this information is now outdated. The Mini RC Car Project has been one of my favorites to do. If you haven`t checked that.... -
A standard 12-volt auto electrical system can be considered to be a powerful but unreliable source of low-voltage DC current. Some of the features any mobile PC installation should provide include: Automotive systems must be designed to strict electrical.... -
This circuit provides a short circuit protected power supply from PC 12V supply voltage. This is particularly handy when working with PC interfacing projects. Fig-1 shows the circuit diagram of the complete power supply. The necessary 12V supply voltage is.... -
In order to create the circuitry below, you need a computer software that will control your parallel port. It will cost you about 30 US$. For example, a transistor (model number 2N2222) costs ~50, a DPDT relay, ~1. 75$ (this is maybe the most expensive.... -
Just an early post to share some work on remote controlling the PXA-70x Multimedia controllers. Target For my new install, I have been looking at no.... -
This Atmel IC, is clocked in the circuit with a 12 MHz quartz and provides a communication between the Infrared receiver and the PC, so that this signal can being processed by infrared receiver programs like Girder. As soon as a valid RC5 signal of the.... -
I designed the PC Power-on Combination Lock (PCPCL) last year for my GCSE Systems & Control project. The exam board stated that we must design a product under the broad category of `Safety and Security`. I already had in mind some ideas for what I wanted to.... -
Chipmunk BASIC has lots off useful functions. So I wrote a small BASIC file to read the serial port and then plot the value on screen (Avaliable upon request FREE). The desktop 386SX PC has a 1. 44 FD and a 40M HD, a VGA with 256k of VRAM. BIOS was configure.... -
The simple circuit offers no isolation, but the simplicity of the circuit combined with cost of sound cards and the fact that diodes 1 and 2 add a good measure of protection makes this circuit ideal for the average user. Notice the physical hardware includes....
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
Popular Circuits
Its a digial clock which make use of AT89C4051 to work as a Real time clock. Port 1 of the...
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Most all work off of some flip-flop like principle. And while I could have suggested a true...
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This manual is applicable to all integral horsepower DC motor controls of this series from 40...
BC547 transistor. Max operating current is 100 mA while max voltage is 65 volts. With the...