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Showing posts from October, 2014

Soldering Fun

From Midi to Control Voltage I decided to start my project with the Midi2CV functionality. As the mios32 on stm32F4discovery board can already receive midi events from USB it was best to try to turn those into control voltage first. Support for traditional midi hardware input can be added later. The CV output schematic is heavily based on Midibox AOUT_NG board  but I made some tweaks because of component availability etc. For example the DAC voltage reference on my board is Maxim's REF02 because I happened to have one around. I also left the other half of the circuit out for now as I don't need 8 cv outputs (yet!). I have done lots of soldering during the years but always with the good old through-hole type components. Even a left-handed bass player can easily work with those. Unfortunately I was only able to find the MIOS32 supported d/a-converter MAX525 in a modern super tiny SSOP package. The options were to use another DAC-chip and write a driver for it or learn t