nRF52840 connection with power souce/battery

RE: nRF52840 connection with power souce/battery

Kaja — Mon, 22 Jul 2019 12:38:31 GMT

Hi Gagan,

here you have the HW files for the nRF52840 DK, there you find examples of powering the chip with USB and coin battery:
devzone.nordicsemi.com/.../nRF52840-Development-Kit-_2D00_-Hardware-files-1_5F00_0_5F00_0.zip

The product specification can be found in our infocenter.

Example for the module, you have to have a look at the DK's from the module vendor.

Best regards,
Kaja

RE: nRF52840 connection with power souce/battery

awneil — Wed, 17 Jul 2019 16:15:02 GMT

Again, the Product Specification tells you what the chip requires.

It is up to you to design a suitable means to satisfy those requirements.

If you are not able to do this design, then you need to hire someone who can.

Or purchase a ready-made product; eg, https://shop.ruuvi.com/product/ruuvitag-1-pack/

RE: nRF52840 connection with power souce/battery

Gagan Gopal — Wed, 17 Jul 2019 15:56:19 GMT

It said a USB powers the chip. It calls it the Vbus does not make sense to me.

RE: nRF52840 connection with power souce/battery

Gagan Gopal — Wed, 17 Jul 2019 15:32:56 GMT

How can I connect a battery to the nRF5280 or a bluethooth module? I can not find this in the product specifications.

RE: nRF52840 connection with power souce/battery

awneil — Wed, 17 Jul 2019 15:28:53 GMT

[quote userid="81557" url="~/f/nordic-q-a/49888/nrf52840-connection-with-power-souce-battery/199043"]Does the supply refer to the battery?[/quote]

The chip neither knows nor case what is the source of the power.

The Product Specification gives the requirements of the supply

RE: nRF52840 connection with power souce/battery

Gagan Gopal — Wed, 17 Jul 2019 15:28:16 GMT

Can someone please answer this question?

RE: nRF52840 connection with power souce/battery

Gagan Gopal — Wed, 17 Jul 2019 15:27:39 GMT

Does the supply refer to the battery?

RE: nRF52840 connection with power souce/battery

awneil — Wed, 17 Jul 2019 15:25:45 GMT

[quote userid="81557" url="~/f/nordic-q-a/49888/nrf52840-connection-with-power-souce-battery/199043"]what is the VDDH and VDD[/quote]

They are described in the Product Specification of the nRF52840

RE: nRF52840 connection with power souce/battery

Gagan Gopal — Wed, 17 Jul 2019 15:00:19 GMT

Does the supply refer to the battery? And what is the VDDH and VDD? I could not find or understand what these are when I searched them up.

RE: nRF52840 connection with power souce/battery

Gagan Gopal — Wed, 17 Jul 2019 14:55:12 GMT

I could not find the Development Kit you guys have mentioned. Also is this the circuit diagram RK mentioned? I have inserted the image.

RE: nRF52840 connection with power souce/battery

awneil — Wed, 17 Jul 2019 14:06:22 GMT

[quote userid="81557" url="~/f/nordic-q-a/49888/nrf52840-connection-with-power-souce-battery/198970"]I could not find any example circuits in the documentation that included power.[/quote]

It is assumed that you can design a suitable power supply.

Have you ever designed any electronic hardware before?

[quote userid="81557" url="~/f/nordic-q-a/49888/nrf52840-connection-with-power-souce-battery/198970"]is it possible to make a circuit that connects a power source or battery such as a lithium coin cell to the ISP1807[/quote]

Of course it is - without a power source, it won't work!

As RK says, you can take the Development Kit as a basis ...

RE: nRF52840 connection with power souce/battery

Gagan Gopal — Wed, 17 Jul 2019 12:28:21 GMT

Thank you for answering my questions. Oh okay, I see. I could not find any example circuits in the documentation that included power. Oh okay is it possible to make a circuit that connects a power source or battery such as a lithium coin cell to the ISP1807?

RE: nRF52840 connection with power souce/battery

RK — Tue, 16 Jul 2019 22:53:17 GMT

The nRF52840 is just a chip, so of course it doesn't have a power source, you need to add all the external components required, including power, to use it, there are example circuits in the documentation. Then you talk about ISP1807 which is a module which contains the nRF52840 plus some external components like antenna and crystals, and of course that doesn't have a power supply either. However Insight (who make the ISP1807) have a development kit which you can use to develop your own circuits and they have schematics and gerbers showing how that development board is designed. Not sure what else you're looking for here.