@skywatch - great, I will have a look.
The question im asking myself now is if AC voltage is the only parameter you need to know when selecting a MOV. I had a comment here suggesting there was more to it.
Edit: Something like this? https://www.electronicdesign.com/power/select-right-varistors-overvoltage-circuit-protection
@skywatch i was looking for a good video about varistors - mostly about finding the right one for my AC rating. Do you happen to know one? All i found was "this is how a mov functions"-videos.
As pointed out by @reinhold, here's a handy tool for programming your nRF52840 dongle, and possibly other nRF52 projects too:
https://www.tindie.com/products/ElectronutLabs/pogoprog-model-c-pogo-pin-programmer-swd-2-pack/
I think I'd like it better if it could somehow latch itself to the board, though, so that I could also get debugging information hands free without having to continually press the tool up against the board.
Yes, 1.27mm pitch should be possible with pogo pins (I have never done them myself, though).
You need to buy the smaller pogo pins (diameter 0.68mm). Some examples by other hackaers can be found e.g. at
What's the smallest hole ptich that I can do pogo pins with? e.g. is 1.27mm pitch possible?
Hello, I had a similar case with a varistor from AliExpress too, after some time and for an unknown reason it shorted, but without any visual indication of a problem. It was on the dual ssr board that didn't have a fuse before the varistor so it triggered the circuit breaker... Board worked fine for a few weeks without varistor after that, but I didn't feel confident to continue using it for a long time.
@uhrheber said in nRF5 action!:
@neverdie There are three ways to manipulate registers directly from Micropython:
Use machine.mem16
Use the decorator @micropython_viper
The Viper code emitter implements integer types and pointers, allowing to access memory and registers directly.Use the decorator @micropython.asm_thumb
Write your code in ARM assembler.Problem: I don't know whether any of this is already implemented and works reliably in Micropython for nRF.
Thanks! We finally nailed it all the way down on this thread here: https://forum.micropython.org/viewtopic.php?f=12&t=5377
@strixx actually a have a similar problem but my OpenHab sends random notifications maybe every 2 days that motion was detected but i didnt debug yet. Whatever .. do you power your PIR with 5v ? With 3.3v for sure this will happen.
@uhrheber said in Everything nRF52840:
One interesting thing I stumbled upon:
https://github.com/insane-adding-machines/unicore-mx
UniCore-MX | Universal Core for ARM Cortex-M0/0+/3/4/7/X
Supports nRF51/52
I looked at the link, but I can't figure out what problem it's solving. What's the headline on that?
