Tag Archives: pc

SDR Soundcard Tester

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The key to using a soundcard successfully in digital signal processing or digital radio applications lies principally in the characteristics of the soundcard itself. This applies in particular to SDR (software defi ned radio) programs that turn your PC into a top-class AM/SSB/CW receiver, assuming your soundcard cooperates. If you… Read more »

Hacks and Mods: Modded PC Inspired With Frank Lloyd Wright

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You think you already see all the possible case mods? This mod was inspired by the work of the famous Fallingwater architect Frank Lloyd Wright. The inspired drink bar cantilevered roofs from teak, mahogany highlights, the Cherokee red and covered wagon code colors it is enough to architecture nerd powerlessness…. Read more »

RS-232 Laser Transceiver

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Laser based projects used to be expensive, until the development of solid state lasers. This project is designed for the entry level laser experimenter. The circuit allows any two computers with serial (RS-232) communication capability to communicate over 200 meters using a laser beam. A low cost transmitter only circuit… Read more »

Casio data logger

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AWARD – This design has been judged the "best overall" at the Circuit Cellar Ink "Design 98" Contest sponsored by Microchip and Hewlett Packard. Alberto Ricci Bitti PIC based Casio Data Logger design Bring the REAL world inside the Casio! Now you can interface your Casio to the outside world!… Read more »

The Relay Sub Board

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Attach this board to the Simplified I/O Interface Board Use nine pieces of hookup wire (or a piece of ribbon cable) to connect corresponding points on the I/O Demonstration Board to the Relay Sub Board. Connect 12 volts DC (smoothed) to the power input points on the I/O Demonstration Board…. Read more »

A Worked Stepping Motor Example

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Perhaps some of the most commonly available stepping motors, for the experimenter, are the head positioning motors from old diskette drives. These can be found at electronics swap meets, in computer surplus outlets, and even in trash dumpsters. In addition to a stepper, a typical full-height 5.25 inch disk drive… Read more »