Quote Originally Posted by Chaz View Post
Ok, got it to start, had to put in a timing value for PWM. It turns but my speed changes dont change the input voltage that is stuck on roughly 3V. Just wondering how my USB powered device 'creates' 10V if there is no external power supply.
From what I have seen, quite a lot of BOBs need a separate external power supply for the analogue output, typically 12V. Some VFDs can provide this - all depends on the combination of kit you are using.