Hi
>> Yep, and being in dry ice sublimating at −78.5 °C (minus). HeatsinkFrost.jpg
ah, good eyes I missed that detail. strange my PICO 2 at 2.2v and 600Mhz creates no extra heat (touch only). Having a FLIR camera is a very big advantage, I wasn't thinking of pouring 1amp at 3.05 volts into the core, more like 5volts into VREG_IN.
I worked out a better strategy (for small work). Have more patience and the correct tools, Killed a poor little PICO 2 before 1 electron went thru it. So I will try again.
After sleeping on it, I came up with PIO, 2 DMA channels and 2 uarts.
1: DMA 1 32 bytes directly into uart 1 from PIO
2. DMA 2 (chained) 32 bytes "" uart 2
So no CPU, MEM, USB, PLL2, anything else not needed and at 16Mhz uart the whole thing finished in <200uSec.
64bytes is 128 samples at 4bits wide, 256 at 2 bits (I usually only need 2 channels), so fine for delay's and rise times.
From your posts, which are extremely helpful. Strategy, make the "on chip" regulator work better.
>> I've tried RISC-V. step less voltage while running a little bit cooler
again, very good information.
thanks Brian
>> Yep, and being in dry ice sublimating at −78.5 °C (minus). HeatsinkFrost.jpg
ah, good eyes I missed that detail. strange my PICO 2 at 2.2v and 600Mhz creates no extra heat (touch only). Having a FLIR camera is a very big advantage, I wasn't thinking of pouring 1amp at 3.05 volts into the core, more like 5volts into VREG_IN.
I worked out a better strategy (for small work). Have more patience and the correct tools, Killed a poor little PICO 2 before 1 electron went thru it. So I will try again.
After sleeping on it, I came up with PIO, 2 DMA channels and 2 uarts.
1: DMA 1 32 bytes directly into uart 1 from PIO
2. DMA 2 (chained) 32 bytes "" uart 2
So no CPU, MEM, USB, PLL2, anything else not needed and at 16Mhz uart the whole thing finished in <200uSec.
64bytes is 128 samples at 4bits wide, 256 at 2 bits (I usually only need 2 channels), so fine for delay's and rise times.
From your posts, which are extremely helpful. Strategy, make the "on chip" regulator work better.
>> I've tried RISC-V. step less voltage while running a little bit cooler
again, very good information.
thanks Brian
Statistics: Posted by brianWS — Sun May 11, 2025 1:49 am