Interface a uC to PC RS232 with MAX232A
This is the standard configuration on how to Interface a uC like 8051 to PC RS232 with MAX232A. The UART or Serial port was not present in 8049/8749 chips which...
Connect Nokia 3310 LCD to LPT port
I found this circuit really simple and interesting. It is really simple to drive Nokia 3310 graphical LCD by using simple LPT cable and some PC software. Firs o...
Computer Controlled Stepper Motor
In this article, we will connect a stepper motor to our computer`s parallel port, and then we will write some code to control it with the scroll wheel on a mous...
How LCD Display Interface Circuit works
An LCD -liquid crystal display is an electronically-modulated optical device made up of any number of pixels filled with liquid crystals and arrayed in front of...
Human-Computer Interface Technology 2
Prototype 2 uses the same base to control different elements. This time we have added a button to make the tone play only when it is pressed, as well as a rotar...
There is an UART on the Nexus 4
I chose the Nexus 4 as these devices are traditionally very open, as you can see in case of the Nexus 4 e. g. by the availability of Ubuntu Touch images. I didn...
How to enable USB-Serial Port adapter (RS-232) in Ubuntu Linux
Though some might argue that Serial port are things in the past, it is still the most popular port for those who are into electronic DIY. Building electronic de...
Removable Memory Card (MMC) on mobile phones circuit
In this tutorials we are going to tackle out how dos the memory card circuit works on mobile phones. As in my previous post I talked about memory card pin-outs ...
Laptop Notebook Schematic
Laptop Schematic Circuit Diagram for Laptop Repair, Laptop Bios Password Remove....
Automobile and Electronic projects
This is an 8-input x-output audio/video switch module to be controlled from a computer, for example from the parallel port. Each audio/video output can be switc...
VGA to video converter
I used the first circuit to generate the greyscale video, and mixed in the composite sync obtained from the second circuit, I had tried just mixing in the Hsync...
74LS192 Computer controller 4 DC motors
This circuit has proven useful when interfacing my computer to home made robotics. It is easy to build and use and it can control two DC motors of any current o...
MotherboardCircuit Free Download
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Db15 Vga Diagram Schematic And Pinout Schematic The Db15 Vga
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USB demo board
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Dvm Adapter For Pc Circuit
The adapter consists of a voltage to frequency adapter with a signal conditioner and protection circuit. J2 connects to the game port of a PC. ...
8-Channel A/D Converter For Pc Clones Circuit
An A/D converter by National Semiconductor (ADC0838), converts 0- to 5-V analog inputs to a digital data format. A 9-V battery is used....
Child-Proof Reset Switch
The reset switch on a computer is very important. If an operating instruction threatens to wreck the internal mana...
Reset Protection For Computers
This protection circuit is inserted between the reset switch and the motherboard. The earth connection of th...
A/D Board
An IBM PC can operate the two 12-bit A/D converters in Fig. 1 via its printer port. The converters" serial outputs use only two o...