Discussions about projects created on OpenHardware.io.
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@NeverDie The cell probably is not so sophisticated as the one installed in the fx-260. Also, from four visible sections only three are working. Sigh.
It seems the calculator can acceptably work as long as it supplied with 1.3V or more. This roughly estimates to 40 lux for this particular PV cell. However, the display is the resource hog - every additional digit causes voltage drop. Usable number of digits - five or less. After reset the calculator draws 3µA. Every "8" adds up 0.1µA thus reaching PV short circuit values very soon. The IC seems completely unregulated - at higher voltages it draws proportionally more, up to 1mA.
It's also possible to gain little bit more power (about 70mV) if bypass polarity protection diode. However, it might be rather better to employ 10µF capacitor to compensate for keypress actions. With 92µF it's also possible to enter longer numbers, but you have to type them fast, then store the number in memory, then quickly clear display and wait until the capacitor charges. Now you can type another number, press operation, and, finally, MR and = to calculate result
@j54n1n at this time NodeManager can only handle interrupts through the designated pins and only one type of interrupt per pin. But feel free to submit a feature request on https://github.com/mysensors/NodeManager/issues and, if you have, any piece of code which may help in the implementation. Thanks
@monte I had tried that one before, but know that it's useful to restore the file doesn't seem to work and I get an error. Perhaps bad luck, will have to try again.
In the meantime while reinstating HA I'm facing quite some difficulties in getting HA to install within docker via link. I'm facing a broken pipe quite often and have no idea how to fix this, tried different ssh settings but when installing HA it seems to get stuck at
pi@raspberrypi:~ $ sudo su
root@raspberrypi:/home/pi# curl -sL https://raw.githubusercontent.com/home-assistant/hassio-installer/master/hassio_install.sh | bash -s -- -m raspberrypi3
[Warning] No NetworkManager support on host.
[Info] Install supervisor Docker container
packet_write_wait: Connection to fe80::233b:33dc:8d3e:eb75%en0 port 22: Broken pipe
Yesterday it did pass but then hassio had troubles successfully launching. It got the below error in the logs, not sure what caused it.
error /usr/share/www/manifest.json
Now trying to install hassio again, any suggestions are welcome. I'm going to try a different SD card and wifi connection instead of ethernet.
@secantscope said in Enclosure for Honeywell HPM-series PM sensor:
@Nca78 said in Enclosure for Honeywell HPM-series PM sensor:
For enclosure, another option is a radiation shield.
What do you mean by "radiation shield"?
Try Google
