Looking for ideas to mount coin battery holder to nrf52840-dongle.

Hi, I ordered the  nrf52840-dongle, but instead of using the USB or external battery to power, I am interested in connecting to a coin battery such as CR2032. I ordered a battery holder, https://www.adafruit.com/product/1870

My question is, do I just wire it directly to the 3v pin or do I need some regulator stuff in between?  Any other solutions? Thanks!

Top Replies

Parents
  • You need to make some changes:

    The nRF52840 Dongle can also be configured to be supplied from an external regulated 1.8–3.6 V source through the VDD OUT connection point. To enable this, SB2 must be cut and SB1 must be soldered.

    CAUTION: Do not have both SB1 and SB2 connected at the same time as this will damage the nRF52840 SoC

  • The nRF52840 Dongle can also be configured to be supplied from an external regulated 1.8–3.6 V source through the VDD OUT connection point. To enable this, SB2 must be cut and SB1 must be soldered.

    Once this change is made can the board still be flashed using the USB bootloader?

Reply Children
Related