Category Archives: tutorials

Video tutorial: OFDM packet transceivers with GNU radio

in RF, SDR, tutorials, Videos by the machinegeek | 0 comments

Orthogonal frequency-division multiplexing or OFDM is a method of encoding digital data on multiple carrier frequencies. At this presentation from them recent FOSDEM 2014 conference in Brussels, Martin Braun explained the use of GNU Radio software and an SDR transceiver … Read more

Online course – Embedded Systems: Shape the world

in ARM, News, tutorials by the machinegeek | 6 comments

Jonathan Valvano, professor at The University of Texas at Austin informs us of his upcoming embedded systems course. Myself and Professor Yerraballi are teaching a course this semester in collaboration with edX called UT.6.01x Embedded Systems: Shape the world. It … Read more

A method of applying a precision reference voltage to an Arduino AREF pin, without accidentally blowing up the processor

in Arduino, tutorials by DP | 0 comments

Telford Dorr shared a tutorial on how to apply a precision voltage to the AtMega Aref pin without accidentally blowing up the processor. There’s a better way: feed the Aref pin resistor with an op-amp, and connect the op-amp negative feedback … Read more

HackRF and POCSAG decoding

BinaryRF has posted a detailed tutorial on using the HackRF SDR to decode POCSAG pager traffic. He starts with the HackRF hardware connected to his Ubuntu Linux box. The basic procedure involves using gqrx, then pipingthe audio output to multimon … Read more