Author Archives: R-B

F*watch: A fully open electronic watch project featuring multiple sensors

This fully-open digital wrist watch is designed by a group of employees at CERN as a special present for one of their retiring colleagues who likes hiking and timing. The watch features multiple sensor units including GPS, pressure sensor, 3D-accelerometer, compass, and ambient light sensor. A 128×128 pixels LCD with backlight feature is used for front display. The watch also provides a MicroSD card slot for storage. Powered by a 500 mAh Lithium-ion battery, the project uses Silicon Labs’ EFM32 Giant Gecko ARM® Cortex®-M3 based 32-bit microcontroller as its brain.

F*watch: Open-source wrist watch

F*watch: Open-source wrist watch

[via: HackAday]

USB Tweezers for ZRLC measurements

Ajoy Raman’s new project on Instructable is about making a low-cost hand-held tweezers to meause R, L, C, and Z (complex impedance). The project uses the TI’s TMS320F28027 micro-controller, an 8-port-analog-switch ADG714 from Analog Devices and the MCP6022 rail-to-rail dual Opamp IC. The ZLRC measurements are sent to a PC through an USB port using an USB-to-TTL converter. He also developed a GUI application for the PC end to display the results.

USB tweezers for ZRLC measurements

USB tweezers for ZRLC measurements

Web radio player using Arduino

WebRadio is an inexpensive web radio player designed by Vassilis Serasidis using the Arduino platform. It features high-quality stereo output and 14 pre-defined radio stations, which can be set/modified in the Arduino sketch.

Arduino WebRadio player

Arduino WebRadio player

The Arduino sends a request to a WebRadio server through the ethernet module (ENC28J60). The ENC28J60 is connected to the webradio server, sends the request and waits for response from the server. The response will be the header information of the radio station followed by the audio stream (mp3, aac etc). The arduino gets the answer from the server and sends the received data to the VS1053B mp3, aac, wma decoder. The VS1053B automatically recognizes the kind of the received format, decodes it and outputs it to the speakers. On LCD is appeared the WebRadio station number (1-14) and the first 122 characters of the server header response.

Read the details!

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