Search found 5 matches

by aiyiadam
Thu Dec 27, 2018 7:37 pm
Forum: DSO Shell
Topic: Li-ion power mod
Replies: 144
Views: 184999

Re: Li-ion power mod

@upsss Thanks for the tip. If I didn't have the step-up cable, I would definetly prefer to use a step-up module like that.
by aiyiadam
Thu Dec 27, 2018 4:46 pm
Forum: DSO Shell
Topic: Li-ion power mod
Replies: 144
Views: 184999

Re: Li-ion power mod

Lots of great ideas here. Maybe this could be simpler and faster solution for those like me, who aren't that skilled. For DSO Shell I had bought a cheapish step-up USB cable (Unnlink brand) and was using it with a powerbank. Since the cable is too bulky and there is enough space in the DSO Shell, I ...
by aiyiadam
Sun Dec 23, 2018 4:13 pm
Forum: DSO Shell
Topic: Damaged the STM32
Replies: 3
Views: 3037

Re: Damaged the STM32

Thank you for the reply. It is a cheap TDA7492 amp board powered with a 4.74A Delta Electronics brick power supply. The negative of the power supply is referenced to the ground. And I was powering the DSO Shell with a powerbank (using a 9V step up USB cable). I forgot to mention the very important p...
by aiyiadam
Fri Dec 21, 2018 9:02 pm
Forum: DSO Shell
Topic: Damaged the STM32
Replies: 3
Views: 3037

Re: Damaged the STM32

Let me also add a photo of my genuine DSO Shell :D and ask one more question: What is the DC rating for the C1?

Thanks
by aiyiadam
Thu Dec 20, 2018 11:43 am
Forum: DSO Shell
Topic: Damaged the STM32
Replies: 3
Views: 3037

Damaged the STM32

I have just fried the STM32, while I was testing a digital amp. The amp had an output of ~5Vpk (600Hz sine wave) and was connected to a 8 ohm speaker. I connected the probe to the positive and the ground to the negative output of the amp, which was a mistake big enough to destroy the oscilloscope im...