USB Digital Setting Circles

The serial version of the DSC circuit described in these pages is readily adapted to use with a USB-serial conversion cable. In fact, FTDI makes the TTL-232R-5V...

Rotate a stepper motor using a computer

Designing and implementing this circuit was really very exciting for us. When designing the interface, we learn things of controlling a device from a computer. ...

English Amiga Board

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Industrial Interface

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Another kind of relay driver board used to utilize your old PC

This article means to utilize your old PC to be come a simple controller. Many old PC like 8088 type, 8086, 80286, 80386, or even 80486 already become an obsole...

making a coolpix e990 dual USB / serial cable

How to make a combined / dual serial and USB cable for the Nikon Coolpix 990 (e990) camera....

Prototype: Bus Pirate 3EEPROM explorer board

This is an old version, see the latest version on the documentation wiki. Now you`ve got one of Hack a Day`s Bus Pirates, what do you do with it? Learn about 1-...

MGT Lifetime/Universal Disc Drive

The Lifetime Drive, later renamed the Universal Drive after issues regarding implied warranties, was produced by Miles Gordon Technology (MGT) in April 1989 as ...

PS2 mouse and BASIC Stamp computer

A mouse has two axes: "X" and "Y". When the mouse is moved "horizontally", the "X" wheel inside the mouse rotates. When the mouse is moved "vertically" (upon a ...

Parallel Port Relay Interface Circuit

Below are three examples of controlling a relay from the PC`s parallel printer port (LPT1 or LPT2). Figure A shows a solid state relay controlled by one of the ...

RS-232 Serial Interface Status Indicator Circuit

RS-232 Serial Interface Status Indicator Circuit. I designed this circuit many years ago and have used it several times since.  It uses a single logic IC to in...

Control electrical appliances using PC

Control electrical appliances using PC. Here is a circuit for using the printer port of a PC, for control application using software and some interface hardware...

Serial communication between AVR-006 & computer

use microcontrollers to communicate in serial between the microcontroller (AVR-006 kit) with a computer. In this project we will use microcontroller AVR-006 fro...

RS232 Reset for Microprocessor

This circuit allows a remote microprocessor to reset the control of a host by sending an interrupt signal on an RS-232 or RS-422 serial line. If the remote mach...

Electronic projects related to computers

DC motor drive controller control two DC motors of any current or voltage rating, depending on the rating of the relays. The circuit also provides two shaft enc...

usb to rs232 converter using ft232

Some still remember the serial RS232 port or ports, or there is also a call COM PORT because rarely posrt RS232 function has been replaced with a USB port. But ...

USB IO Adapters circuits

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USB to RS232 Using Atmel ATtiny2313 or ATmega8

The Universal Serial Bus (USB) interface has become extremely popular, due to its simplicity for end user applications (Plug and Play without restart). For deve...

RS232 to USB Converter

[caption id=attachment_45 align=alignnone width=500 caption=Serial RS232 to USB][/caption] This is simple RS232 Serial to USB Converter that....

PARALLEL BUS REVEALED Conclusion of the first-ever PBI usage guide

This article includes an assembly language listing that requires MAC/65 or Atari Assembler Editor. You will also need access to an EPROM burner. The three earli...