This project implements an mbed library to control a Silicon Laboratories Si570 variable-frequency oscillator (VFO) for ham radio use. The mbed is controls the frequency of a software-defined radio (SDR) receiver. You can set the frequency with a computer via a USB, RS-232, Bluetooth, or Ethernet connection. The VFO can also run stand alone using an incremental encoder and display. This project got a 'Distinctive Excellence' award in the NXP mbed Design Challenge 2011.

S is a rotary switch with push button that is used for large frequency steps or band switching. Furthermore S is used to control menu settings. F is a rotary encoder with 360 steps per revision, used as main frequency dial.

This project is still under development, keep an eye on this site for further updates.

JMM is data-acquisition software for digital multimeters equipped with a rs-232 port, such as the Metex 3850 and many others.

Version 2.0.1:

- Added presets for RadioShack 22-805 and Metex ME-11 DMM.

- Minor bug fix.