nRF51422 power/current measurement

RE: nRF51422 power/current measurement

10Hsin — Tue, 09 Feb 2016 15:11:33 GMT

Thanks for your response, it really helps.

RE: nRF51422 power/current measurement

Øyvind Karlsen — Mon, 08 Feb 2016 09:08:09 GMT

Yes, I mean 3v3 on the board. The reason that measurements becomse unreliable when using serial is that there might be current leakage through the link if you are not careful. If you are using uart you can simply leave it unconnected while measuring as it will continue transmitting.

RE: nRF51422 power/current measurement

10Hsin — Sat, 06 Feb 2016 08:12:17 GMT

And as the nRF51- DK - User Guide v 1.0, p18 says, the measurement will become unreliable when a serial terminal is connected to Virtual COM port, so if I try to use ble_app_uart and my nRF51 dongle connected to computer, how can I measure the current correctly?

RE: nRF51422 power/current measurement

10Hsin — Sat, 06 Feb 2016 07:15:38 GMT

Hi Øyvind, thanks for your help, but you mean "3.3V" on the board? (see the image)

RE: nRF51422 power/current measurement

Øyvind Karlsen — Mon, 01 Feb 2016 07:18:34 GMT

Hi,

Have a look at the following tutorials:

For the nRF51 dongle the current measurement setup is not so straightforward as there are no solder bridges, you could however attempt to use the oscilloscope method as described in the tutorials. When doing this you will utilize the 3v3 and GND ports along the side of the board.

Best regards,

Øyvind