I have an aluminum case, not using it lately. I mostly use a USB wifi adapter. If you clone a Pi SD card it ends up on the same IP address as the original. I couldn't get it through anybody's head at raspberry pi.org that this is a problem. USB wifi is at least different, haven't tried 2 of them. Possibly it only happens with Raspbian, not Debian.
Sent from my Motorola XT1527 On Thu, Jul 4, 2019, 1:14 PM Larry Dighera <la...@kj6yvt.com> wrote: > > From the information provided in this video > https://youtu.be/26OxCwEHoTk there appears to be about a 15 dB > reduction is WiFi signal strength with the FLIRC aluminum case > installed. > > If WiFi signal strength is an issue, how difficult would it be to > install an external antenna (or two)? > > This review provides information comparing the RPi 3b+ to the 4B: > https://www.tomshardware.com/reviews/raspberry-pi-4-b,6193.html > It provides heat maps (attached) and CPU thermal throttling > information: > > "While running a CPU-intensive workload for 10 minutes, the processor > hit 81 degrees and began throttling down from 1.5 to 1 GHz after 3 > minutes. However, the system kept bringing itself back to the full 1.5 > GHzas when it dipped down to around 80 degrees, but then it would get > warm again and go down to 1 GHz. If you want to have better sustained > performance under load, consider getting an active cooler for the > Raspberry Pi 4 or, at the very least, attach a passive heat sink." > > > Here's an alternative plastic case: > https://www.pishop.us/product/highpi-raspberry-pi-case-for-pi4/ > > HIGHPI CASE FEATURE LIST > High quality ABS plastic case, designed and made in Canada > Industry-leading ease of use, rapid tool-free assembly and disassembly > Large internal volume for HATs, break-out boards, or heat sinks > Vents on three sides double as fly-through cable ports > Two-section breakout on A/V side for HAT board I/O > Large vent opposite A/V side allows GPIO ribbon cable pass-through > Micro SD card access port > Mounting option 1: two M3.5/M3/#6 screws slide into wall mounts > for easy removal, horizontal orientation with A/V side down, 40mm > spacing > Mounting option 2: four M3.5/M3/#6 screws through feet from inside for > secure mounting in any orientation, 68.3 x 38.8mm spacing > Self-adhesive rubber feet included, set of 4 > Matte finish hides fingerprints > DIMENSIONS > External dimensions: 97 x 66 x 41mm > Internal volume for breakout boards: 90 x 60 x 28.8mm > > > > > On Fri, 28 Jun 2019 20:54:39 -0400, Alan Corey <alan01...@gmail.com> > wrote: > > >Unless you're going to overclock it (which I'm not sure is possible, > >probably) you don't need a heat sink. It will throttle (reduce speed) > >if it gets hot. A heat sink keeps it from overheating so soon so it > >can run at full speed longer. If you run cpuminer (to mine Litecoin > >or Bitcoin) it will overheat a Pi very quickly and slow down, even > >without overclocking, because it's so CPU-intensive. You can run less > >threads to run cooler. > > > >What I'd like to see is a massive heat sink that dwarfs the circuit > >board and becomes dominant, sort of like with Pentiums, could even > >have a fan. You'd mount the heat sink then bolt the Pi to it, > >probably with heat sink compound or a heat-conductive washer. The > >connectors and wires would go wherever they ended up. There could be > >such setups as aftermarket addons. > > > >I don't like that they continue to push the power connector to its > >limits instead of going to something else like a coaxial plug like the > >Rock64 uses. I'm not sure it it's still a microusb or not. But you > >can always power through the GPIO connector. > > > >And this uses _micro_ HDMI connectors, as opposed to the Zero which > >uses _mini_ or the earlier Pis which have just a regular HDMI. So if > >you have a slew of Pis and Zeros you need 2 adapters for video. > > > >GPIO pinout at > https://www.element14.com/community/docs/DOC-92640/l/raspberry-pi-4-model-b-gpio-pinout-with-poe-header?ICID=rpimain-smartpanel-pi4doc > >I'm not sure how different it is. The Pi GPIO has gotten to be a > >defacto standard that other manufacturers also use. I see there are > >still multiple 5 volt and ground pins so they can be paralleled for > >more current capability. > > > >I welcome the 4 GB of RAM the most, I use 2 swap files and get tired > >of waiting for swapping and unswapping. Hopefully the ethernet is no > >longer tied to the USB. > > > >There is a new case and power supply, at least partly for the 2 > >micro-HDMIs. A Rock64 fits into a Pi case but the power connector is > >different so it needs some filing. The cases are sort of a nuisance > >because the wires dominate everything and are much heavier. > > > > > > > >On 6/28/19, Rick Thomas <rbtho...@pobox.com> wrote: > >> So when I buy one of these in a couple of months, do I need to buy the > >> heatsink too? Will the heatsink fit into the standard case? If not, is > >> there a case that will fit? > >> > >> And, finally, is there a version of Debian that will run on one of > these? > >> Or should I just plan on running Raspbian? > >> > >> Thanks! > >> Rick >
