nrf52840dk not working properly

RE: nrf52840dk not working properly

AMarch — Tue, 26 Mar 2024 15:10:10 GMT

Glad you are back in operation. Having had a dozen or so of these boards pass through my hands, I know how scary it can be. Nice thing is they are relatively cheap. First rule of government spending "Why have one when you can have two at twice the price". However, in my experience 3 is a magic number.

RE: nrf52840dk not working properly

toni95 — Tue, 26 Mar 2024 15:07:29 GMT

Alright. My fault.

Must have never noticed that the switch was not in nrf ONLY before.

Just read the documentation to this switch, thanks!

RE: nrf52840dk not working properly

AMarch — Tue, 26 Mar 2024 15:04:25 GMT

pretty sure the leds for the chip are disabled when SW6 is set to nRF ONLY.

RE: nrf52840dk not working properly

toni95 — Tue, 26 Mar 2024 14:56:38 GMT

Power Switch (SW8): ON

nRF power source (SW9): VDD

SW10: OFF

SW11: ON

SW7: Def.

SW6: nRF ONLY

USB cable is connected to IMCU USB (J2)

I haven' made any changes to the switches except powering it through J3 with SW9 beeing on USB.

RE: nrf52840dk not working properly

AMarch — Tue, 26 Mar 2024 14:51:37 GMT

One quick check, make sure the switches on the board are in the proper default state. One power switch towards the CPU itself will disable the LED power supply (SW6). Other switches change the source of power (usb, or power input header, which after I read again, you have already attempted). Also SW10 should be investigated.
Of course, make sure the area is clean in clear before plugging it in again.