A Fully Featured, Fifty Dollar QRP Radio

QRP radio operators try to get maximum range out of minimal power. This term comes from the QRP Q-code, which means “reduce power.” For years, people have built some very low-cost radios for this purpose. Perhaps the best known QRP kit is the Pixie, which can be found for less than $3 on eBay.

The QRX is a new DIY QRP radio kit from QRP Labs. Unlike the Pixie, it has a long list of features. The QRX operates on the 80, 60, 40, 30, 20, or 17 meter bands at up to 5W output power. The display provides tuning …read more http://pje.fyi/PnRL0z

Paul Jacob Evans

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ATMega328 3D!

Small OLED displays are inexpensive these days–cheap enough that pairing them with an 8-bit micro is economically feasible. But what can you do with a tiny display and not-entirely-powerful processor? If you are [ttsiodras] you can do a real time 3D rendering. You can see the results in the video below. Not bad for an 8-bit, 8 MHz processor.

The code is a “points-only” renderer. The design drives the OLED over the SPI pins and also outputs frame per second information via the serial port.

As you might expect, 3D output takes a good bit of math, and the chip …read more http://pje.fyi/PdjqNR

Paul Jacob Evans