5 Volts output on nrf51 DK pin

RE: 5 Volts output on nrf51 DK pin

RK — Tue, 01 Dec 2015 07:07:20 GMT

I put a FET on my custom boards if I need to interface to anything with more than 3.3V which is where I usually run my nrf51 modules.

RE: 5 Volts output on nrf51 DK pin

Yacire — Mon, 30 Nov 2015 16:46:09 GMT

Thanks Wojtek

RE: 5 Volts output on nrf51 DK pin

Yacire — Mon, 30 Nov 2015 16:45:26 GMT

Thanks RK,

But i don't understand when you say: " When I need to drive something of 5V I use an on-board FET" you can get a FET in the nrf51 Dk ? or it is your FET in your board ?

RE: 5 Volts output on nrf51 DK pin

RK — Mon, 30 Nov 2015 01:47:22 GMT

Absolutely not - VDD absolute limit on the chip is 3.9V, and you can't get more than VDD out of an output pin, nor can you put more than VDD into an input either. When I need to drive something of 5V I use an on-board FET to buffer between the nrf51 and whatever I'm driving.

RE: 5 Volts output on nrf51 DK pin

Wojtek — Mon, 30 Nov 2015 00:22:59 GMT

The only 5V you can get from nRF51 DK is the one that is supplied from usb connector (so it is ALMOST 5V probably). You cannot drive 5v by a pin afaik.