This project is based on Gaudi Lab’s OpenDrop (https://www.gaudi.ch/OpenDrop/)
Here is the github for Fablab Digiscope’s iteration of the project: https://github.com/merlinmarrs/OpenDrop
We don’t have high voltage MOSFETs so we are using relays instead. In parallel we will be sourcing the components to make the high voltage power supply using a boost converter that takes 12V as input. In the meantime, we will be using a transformer that sources 100V directly to the board to test functionality.
Here is the board cut:
To supply the minimum 100V necessary, I found this high voltage boosting circuit here: https://www.multisim.com/content/dUPNxLKfTuK3sYfGNjNxNg/9v-to-100v-boost-converter/
With what we have in the lab, it’s peaking at just under 80V.
Testing the relay:
Testing the relay with a motor and 9V battery:
Here is the first full prototype:
What we need now is some hydrophobic dialectric like Teflon…