Not nice - Is GPIO the only place we can tap 5v on the board? Imples @rpi only ever expected one aux item to be connected at once?
I think you're right about Aliexpress though. All the other fans take the GPIO power. Thanks for the heads up
Not nice - Is GPIO the only place we can tap 5v on the board? Imples @rpi only ever expected one aux item to be connected at once?
https://pinout.xyz/pinout/sense_hat#dpawson wrote: ↑Wed Aug 07, 2019 11:47 amThanks for that... I'm told that the fanshim Fan and Sense HAT won’t work together, because Fan SHIM uses one of the I2C pins for fan control.exartemarte wrote: ↑Wed Aug 07, 2019 10:13 amIt depends on what you mean by "usable". They're certainly accessible - the shim is very thin and is not soldered. You could connect to the pins with a 40-way ribbon connector or with individual Dupont-style connectors. Some pins are used to control the fan, however, and are therefore not available for other purposes. I'm not sure which they are, but you might find that information on the supplier's website.I haven't come across one, but there's nothing to stop you powering a fan from any appropriate power source. It would be permanently on, of course.
Ah well.
No, they are not. They are only for extracting power from the Ethernet cable. The POE power is applied to the Pi through GPIO header pins.
Not surprising it is awful. The thermal pads I got with my case had one side covered with regular double sided adhesive tape like you'd get from an office supply shop. Their instructions were to peel off the protective layer from both sides and then stick the side with adhesive onto the SoC.pica200 wrote: ↑Fri Aug 09, 2019 5:37 pmI have done some testing with this case: https://www.ebay.de/itm/New-CNC-Aluminu ... 2321943875
With included thermal Pad and no fan it reaches 78-80°C. Got Arctic Thermal Pads in the mail and replaced the old one and boy does it make a difference. Now it's stable at 68°C without fan! If anyone else buys such a case make sure you buy good quality thermal pads because the china pads are crap.
Just a tangential point of reference here ... I noticed an interesting temperature differential on the Pi Zero W that I had just set up with pi-hole yesterday.jamesh wrote: ↑Thu Jul 18, 2019 4:08 pmIt doesn't need much airflow of the board to cool it quite dramatically. I use the board with no case, and just the airflow around my desk keeps it to 55 or so at idle. Moving it to vertical orientation can drop it another degree or so, as the hot air flow is a bit more efficient rising past the board.
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ceiling ceiling
still air fan low fan med
----------- ----------- -----------
temp=51.0'C temp=46.0'C temp=44.0'C
temp=59.0'C temp=54.0'C temp=51.0'C
temp=63.0'C temp=56.0'C temp=54.0'C
temp=66.0'C temp=56.0'C temp=54.0'C
temp=68.0'C temp=58.0'C temp=56.0'C
temp=68.0'C temp=59.0'C temp=54.0'C
temp=69.0'C temp=59.0'C temp=55.0'C
temp=69.0'C temp=59.0'C temp=55.0'C
Wait what? Did you really just use a battery as heatsink?justahumanontheweb wrote: ↑Sun Dec 15, 2019 8:09 pmthe thermals are worse definitly than the 3b+, i ran mine with a C-size battery with the flat end on the cpu with some thermal paste and it worked fine (until it tiped over and shorted the GPIO pins, that is, don't try that at home for your own sake, lol)
More than leak, they can explode.pica200 wrote: ↑Wed Dec 18, 2019 2:14 amWait what? Did you really just use a battery as heatsink?justahumanontheweb wrote: ↑Sun Dec 15, 2019 8:09 pmthe thermals are worse definitly than the 3b+, i ran mine with a C-size battery with the flat end on the cpu with some thermal paste and it worked fine (until it tiped over and shorted the GPIO pins, that is, don't try that at home for your own sake, lol)
Not a good idea. They can leak if you get the SoC up to temperature.