Powering the nRF51822 Development Kit

RE: Powering the nRF51822 Development Kit

Mihail — Mon, 23 Jun 2014 10:07:45 GMT

You can try this main board. It will allow you to power development kit, start development and testing at the same time.

RE: Powering the nRF51822 Development Kit

Ole Morten — Tue, 11 Feb 2014 09:24:27 GMT

When I test blinky here, right from the SDK, it pulls ~4.5 mA, since the CPU is never put to sleep. If you see only 1 mA there is still something weird about your setup...

RE: Powering the nRF51822 Development Kit

Andre Lochner — Tue, 11 Feb 2014 07:28:10 GMT

Thanks I have resolved this issue. Seems my power supply is not sensitive enough, connecting two Leds and running the blinky app only draws 1 mA. Thanks for the replies.

RE: Powering the nRF51822 Development Kit

Ole Morten — Mon, 10 Feb 2014 15:18:02 GMT

When you say you don't see any current consumption, what does that actually mean? Is it exactly 0, or is it some microamps? Did you ever try flashing a softdevice, or doing an erase all? Does that change anything? Do you see any activity on the pins that are normally LEDs (P0.08-P0.15)?

When just the CPU is running, I'd expect to see ~4 mA of consumption, and this is what you should see when flashing blinky.

Have you tried the other board that came with the kit?

RE: Powering the nRF51822 Development Kit

Andre Lochner — Mon, 10 Feb 2014 15:10:09 GMT

Thanks, I really appreciate the support. This is the first time I used them so new device. I use NRFgo studio, click on nRF51 Programming under the device manager. I then program with example/arm/_build/blinky_arm.hex. I don't see a current draw while programming or erasing. The tool does tell me Erase completed. I can also do successful read once I have programmed. I haven't programmed a bootloader.

RE: Powering the nRF51822 Development Kit

Ole Morten — Mon, 10 Feb 2014 14:26:28 GMT

And you still see no current draw, after having flashed blinky? How do you flash it? What kind of current draw do you see while flashing? What kind of current draw do you see after having done an erase all? Does it change if you flash a softdevice?

Unfortunately, your setup isn't really something we officially support, but based on my own quick tests, there shouldn't really be any problems with it, and when I tested it, I got it working as expected. I'm therefore having a little trouble understanding what the problem might be.

RE: Powering the nRF51822 Development Kit

Andre Lochner — Mon, 10 Feb 2014 14:17:25 GMT

I have tried what you suggested. Still no current draw.

Brown wire in the corner connected to GND, other two wires connected to VCC 3.3V.

RE: Powering the nRF51822 Development Kit

Ole Morten — Mon, 10 Feb 2014 13:50:27 GMT

Did you try my suggestion of using K1 and K2 instead of P2? Do you have the possibility to upload a photo of your setup?

RE: Powering the nRF51822 Development Kit

Andre Lochner — Mon, 10 Feb 2014 13:37:18 GMT

My jumper is between 2-3. I am a bit stumped.

RE: Powering the nRF51822 Development Kit

Ole Morten — Mon, 10 Feb 2014 13:11:13 GMT

K2 should be the header in the corner of the board, which can be used for current measuring. The header with the jumper should be K1.

I'm also a little surprised that you don't see any current draw, and I therefore suspect that there is something wrong with your connections, and would recommend you to try a different way of connecting.

If you still have trouble, I'd be happy if you could edit your question and upload a picture or two of your setup, to make it easier to understand.

RE: Powering the nRF51822 Development Kit

Ole Morten — Mon, 10 Feb 2014 12:20:35 GMT

Have you had a look at this?

I would expect that connecting pin 1 on P2 should be sufficient, but as you can see from the schematics, it will depend on which position the jumper on K1 is in.