give external supply to nrf51

[nordicbeginner]

hello there,

i am giving external supply to nrf51. my external supply is usb 3.3 v. but when i connect it with nordic and then if i check it on multimeter , it shows me 2.12 v. can you tell me why??

[Sigurd]

You have to use resistors to set the output voltage to the desired value. So you have to use different values on the resistors to get the desired 3.3 V. Please read the datasheet for the regulator.