Embedded Lab | Embedded Systems tutorials, projects, and more …

Raspberry Pi FM transmitter

Posted on November 7, 2014 by R-B Leave a comment

Do you know you can make your Raspberry Pi play your favorite music over an FM radio with a very little effort? Yes, all you need to make this FM radio transmitter is a Raspberry Pi, an SD card, a power supply, and a small piece of wire to serve as antenna. You can load your audio files into the SD card and choose your transmission frequency in the commercial FM band. The PirateRadio.py python script generates frequency-modulated radio waves on the Raspberry Pi GPIO pin 4, which are injected into air with a short wire connected to it.

Cloud-connected automatic solar tracker

Posted on November 6, 2014 by R-B Leave a comment

The use of solar tracking systems allows the solar panels to track the course of Sun during the day time and ensures that the panels are receiving maximum solar input. A photovoltaic system with a solar tracker can boost the output power by 20-40%, compared to a fixed installation. While there are lots of resources available on internet on solar trackers, this particular solar tracking system is unique in the sense that it offers lot more connectivity and other fancy features than just tracking the Sun. It is built to drive a 90 Watts solar panel with azimuth and elevation

Capacitive touch sensing demo

Posted on November 6, 2014 by R-B Leave a comment

Capacitive touch sensing allows to provide digital inputs with a simple touching of electrodes. In Arduino, the capacitiveSensor library can be used to convert two or more of its I/O pins into a capacitive sensor. This technique requires external resistors and metal foils to work properly. This Instructable describes a physical setup for making five capacitive touch sensors with the Arduino I/O pins.

Arduino multitasking guide

Posted on November 5, 2014 by R-B One comment

Bill Earl’s new tutorial on Adafruit is about multitasking with Arduino where he explains practically how to program an Arduino board to perform multiple independent tasks without the processor being tied up to any kind of delay. His approach define each task as an independent state machine which can execute without affecting or being affected by the others.

DIY audio/video transport control surface

Posted on November 4, 2014 by R-B Leave a comment

Audio/video transport controllers are used in recording studios and live performance setups for quick hands-on control on demanding editing or mixing tasks. These devices are an expensive piece of hardware (costs from a few hundreds to thousands of USD). Victor Frost’s OpenTransport project would allow hobbyists to build an external transport control surface at very low price. It is an open-source, open hardware transport controller that sends out MIDI commands and therefore, works with most of the Digital Audio Workstation and Digital Video Workstation softwares. It is Arduino-powered and provides controls for play, stop, fast forward, rewind, record, loop, and mackie keys Function 1 and

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