LED Power Rev 1 bringup

jkominek / piano-conversion

Hardware, and some firmware, for acoustic piano to MIDI controller conversion.

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LED Power Rev 1 bringup #14

Closed jkominek closed 3 years ago

jkominek commented 3 years ago

[x] Make sure the 5V regulator doesn't explode the MCP1501.
[x] Check IO expander. Not necessary for a useful board.
[x] Check I2C pass through performance?

jkominek commented 3 years ago

IO expander can control the voltage reference (which needs a pull down on its output, per #27), but reading back the status of the lines seems a little off. Probably because all the pins are floating. Will need to finish populating all of the resistors in the middle and check that again.

jkominek commented 3 years ago

IO expander is fine. It occurs to me that it can check whether or not the individual lines are on, but it can't tell if the 15V and 48V are live. Should add some voltage dividers and hook those up to some more of the IO expander pins.

jkominek commented 3 years ago

I2C passthrough seems fine