Korg poly 800 battery mod cutting traces

#Korg poly 800 battery mod cutting traces full

The OS is locked up in a 8048 chip, so it not easy to modify the code to add more presets. There are various level shifters on the main PCB which I have simply omitted and used +15V on the Panel PCB where needed.ДЄ future project could be a replica Pro Mars but the Roland design is incredibly complex, very inefficient in terms of components and space and requires a lot of trimmers.

It also contains the LFO, Noise and half the ADSRвЂ™s, so I had to build at least 50% of it anyway! The Voice Card tends to use +15V on/off signals whilst the panel and DAC of the Roland design uses +5V. I decided to replicate the Roland Jupiter 4 Controller functionality, which translates the 0 to +5V potentiometer voltages into the CVвЂ™s required for the voice circuit even though I am not planning to add in the preset memory capability at this stage of the development.

#Korg poly 800 battery mod cutting traces full

This post describes the work to get to a completed and full working synth. The project started in 2018, but was paused for a year whilst I worked on Behringer projects, and restarted over the Xmas holidays of 2020. Overview The Jupiter One project is an original Jupiter 4 Voice Card turned into a complete single voice synthesizer, with the addition of a replica Controller PCB and the addition of a new Pot PCB that holds the switches, LEDвЂ™s and potentiometers.