via Eric on the SDIY list."This is a voltage controlled DDS, implemented with a Cypress PSoC (Programmable System-on-Chip). It uses standard 1V/Octave control voltages over a 0-10V range and generates 8 different waveforms with a +/-5V swing as output. Output frequencies from 20Hz-20kHz are possible, and falling-edge sensitive hard-sync is also provided....
It was my 'freshman' SDIY project and a good introduction to the ins & outs. I like the idea of the PSoC, but the MCU is a bit underpowered, especially when it's running ISRs to handle all the housekeeping for the various peripherals. The ADCs & DACs are built out of Switched Cap blocks and don't have particularly fast conversion times either. It would be great for low-speed CV stuff thought - LFOs, EGs, etc. and I've got some ideas on the back burner for going further with some of those functions." You can find more info and samples here.
Update: Note that Eric did the firmware for the Modcan VCDO
Wow, that's really cool. Very tiny and versatile. Cool module... I don't mind the aliasing, actually... :)
ReplyDelete