In order to increase the number of pots on my controller I have added an mcp23s17 and two mcp3008 chips. I was wondering if they need dedicated power from the 5v source behind the midi connectors or if they are powered via the connector I have added to bridge my sawn in half axo. Or do I need to source power elsewhere? I don't get a response when I test their functionality at the moment and I want to make sure this is patch-related rather than a hardware issue
Technical question: power source
Gavin
#2
Its OK to tap into both the 5V power on your bridge connection, but use the GND on it as well, just to keep all your connections in order. I powered a completely separate midi controller this way as a substitute for batteries. Worked fine, switched on every time the Axo was powered.