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SwampFlux / video-microwrave

eurorack module that uses a raspberry pi zero as a video synth
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Power via GPIO #1

Closed wraybowling closed 5 years ago

wraybowling commented 6 years ago

Design a circuit that protects the raspberry pi zero using doepfer power.

Here are some resources https://www.modmypi.com/blog/how-do-i-power-my-raspberry-pi https://raspberrypi.stackexchange.com/questions/1617/how-do-i-supply-power-through-the-gpio#1618

wraybowling commented 6 years ago

Power draws for a Pi Zero doing heavy graphics lifting will be ~140mA and 0.5-0.7W http://raspi.tv/2015/raspberry-pi-zero-power-measurements

wraybowling commented 6 years ago

Currently thinking that a 12V to 3.3V stepdown circuit on a standard doepfer 10-pin header is best. it's more commonplace, and eurorack power supplies have way more throughput on the 12V rails. digital arm-based modules like Morphagene and Clouds do this. https://mutable-instruments.net/modules/clouds/downloads/Clouds-v30.pdf#page4 https://www.muffwiggler.com/forum/viewtopic.php?p=1364318#1364318

Note that the MCP3008 can operate at 3.3V too. Following the Clouds schematic might make that easier.

wraybowling commented 6 years ago

https://github.com/mxmxmx/terminal_tedium