Here’s a pretty nice parallel port oscilloscope – This oscilloscope uses the SPP or EPP parallel port (LPT1) for reading the data from ADC. If your LPT1 is an ECP then the program automatically switches the LPT1 in byte mode (normal mode). BUT, not all parallel ports (LPT ports) are bidirectional. “Bidirectional” means, that except […]
The site is in German, but it looks like there’s enough to make your own LED dimmer, source and schematic included… Link.
Randy has a good article on selecting a wall wart (power supply) for your projects, he writes – AC adapter, wall transformer, power pack – they go by many names, but the most popular seems to be “wall wart.” Although they are indeed an “unsightly protuberance,” they look pretty good to me most of the […]
Meet Mr. EQ – a nice DIY equalizer – While use of a graphic equalizer is often recommended for fine-tuning the tone of your instrument, no feasible DIY versions exist. However, a seven-band equalizer is not necessary to drastically shape the response of an instrument of effect. Adding peaks at certain frequencies can provide a […]
R2D2 was on to something. Think easier speech recognition with reduced error rates: Use Linux® or Microsoft® Windows®, the open source sndpeek program, and a simple Perl script to read specific sequences of tonal events — literally whistling, humming, or singing at your computer — and run commands based on those tones. Give your computer […]
Chris writes in with some DIY Radio transmitter circuits… If you can receive, what would you like to send? Here are some of the radio broadcast circuits that I like lately. Some of them I have built, others I would like to or am in the process of testing. One idea would be to set […]
Scott just sent in my new favorite project, he writes – I’ve modified an old newspaper vending box to deliver the latest headlines to my living room each morning, and I don’t even have to fumble around for quarters. It’s a simple home project that can be made with just a few used parts. Design […]
