Hi can you help to configure nrf52840 DK board to measure power consumption with keysight n6705C. In manual is described with ammpermeter and oscilloscope. Keysight n6705c will also be power supply to the nf52840dk via P22 (3.6V DC). Is it enough just to cut SB40 or ? I want just to measure current of nrf52840 and with board leds.
or I must connect keysight on p21 ?
which modification ?
Hi,
It's enough to just cut the solder bridge, and set the Keysight to current measure mode.
regards
Jared
I using keysight as a battery emulator and it is then power supply and measure current consumption.
If then a just connect to external supply (p21) and how must be switches set ( to power nrf52840 and leds)
Hi, I tried now with the zigbee light switch example, and it works with the setup you described.
With that setup I'm able to measure current going in to P21 and still toggle the light with the buttons.
Its not burn or something else because now when only on j2 usb connected and via this connect all board have power (sw8 = ON, SW6=default, SW9 = VDD,sb40/sb41 are short (default)) ? sw10 (vext ->nrf) default off need to change to on thaht will separate powering via j2 and P21 ?
If I want to power buttosn and leds sw6 leave to default?
EDIT: Am I right?
Hi, I tried now with the zigbee light switch example, and it works with the setup you described.
With that setup I'm able to measure current going in to P21 and still toggle the light with the buttons.
Its not burn or something else because now when only on j2 usb connected and via this connect all board have power (sw8 = ON, SW6=default, SW9 = VDD,sb40/sb41 are short (default)) ? sw10 (vext ->nrf) default off need to change to on thaht will separate powering via j2 and P21 ?
If I want to power buttosn and leds sw6 leave to default?
EDIT: Am I right?
gnrboy said:
If I want to power buttosn and leds sw6 leave to default?
Yes, if you want to power the rest of the board then this should be default.
Its not burn or something else because now when only on j2 usb connected and via this connect all board have power (sw8 = ON, SW6=default, SW9 = VDD,sb40/sb41 are short (default)) ? sw10 (vext ->nrf) default off need to change to on thaht will separate powering via j2 and P21 ?
And this is ok? Is it possible to achieve this without connecting usb J2 to power Jlink and rest of the board?
Hi,
gnrboy said:
Its not burn or something else because now when only on j2 usb connected and via this connect all board have power (sw8 = ON, SW6=default, SW9 = VDD,sb40/sb41 are short (default)) ? sw10 (vext ->nrf) default off need to change to on thaht will separate powering via j2 and P21 ?
I'm not sure I understand what you're asking. Could you try to re-phrase the question? Are you asking if it's ok to supply the board with power from the USB and external power at the same time?
Jared
Hi, I tried now with the zigbee light switch example, and it works with the setup you described.
With that setup I'm able to measure current going in to P21 and still toggle the light with the buttons
Yea that is question because that is from article which you have sent me to read? And sw10 (vext ->nrf) default off need to change to on thaht will separate powering via j2 and P21 ?
Hi,
Following the method described in the thread should not hurt the board. For more info, see our Power supply section in the documentation for the Devkit here.
Jared
