MicroPython Forum (Archive)

Opto isolators are most often used to isolate high voltage circuits. They're not the greatest voltage level shifter/relay driver since they usually have a current transfer ratio of less than 1, meaning that it needs more drive current than it outputs. LED's as used in opto isolators also degrade wit...

I recently used this code to set the pico clock from my PC. https://forum.micropython.org/viewtopic.php?t=9706#p54302 This works fine. pythonInject = [ 'import machine', 'import utime', 'rtc_base_mem = 0x4005c000', 'atomic_bitmask_set = 0x2000', 'led_onboard = machine.Pin(25, machine.Pin.OUT)', '(ye...

I assumed the pico board because the USB power is labelled VBUS. The only other board I have is the sparkfun pro micro (which I have not used yet) and USB power is labelled V_USB. On both boards the USB power and external power inputs feed the 3.3 volt regulator which then feeds the MCU (IOVDD, VREG...

On the pico, VBUS is wired to GPIO24. I must be missing something here.