unicornpower
Well-known member
I have used a Teensy 3.6 to build a DIY eurorack sound module. I have a curious issue with power where sometimes the module will just not start up (say 1 in 3). This never happens if I power it via USB or a 5v DC wall plug, only when in my modular rack using my eurorack power circuit (shown below). I've tried this in multiple rack cases, with this as the only module. Has anyone else had problems of this nature? Is there a particularly large current draw from the 3.6 on start-up (card reader?). I've tried multiple voltage regulators (rated >100mA, like the 7805), but the result is the same. When it does power up, according to my bench supply, it's only drawing around 60-70mA.
Even when the board doesn't startup, if I measure the voltage across the Teensy power pins, it correctly reads 5V.
View attachment 12426
Even when the board doesn't startup, if I measure the voltage across the Teensy power pins, it correctly reads 5V.
View attachment 12426