Here are a few more boards, one for 4S and two for 3S. The last one is attached to a triple 18650 battery holder and will be tested with real cells soon. So far all tests look fine.
The 4S and 3S LiIon were soldered using hot air and solder paste (except the MOSFETs, those were already soldered using a normal iron). This was a very pleasant experience and I will use it more often.
#soldering #diyelectronics #BMS #lithiumbattery #18650 #BQ77915 #hotairsoldering #solderpaste
And I finished #soldering the first #BMS board. It's configured for a 5S LiIon #battery with 5A output current limit.
Here the finished board and the test setup.
So far, it works as intended. It cuts discharge at 4.91A, or when battery voltage drops below 14.5V. Charging is disabled when voltage gets too high.
I'll still have to test the temperature behavior, and how balancing works.
When I'm satisfied, I'll try with real cells.
#diyelectronics #BQ77915
Question for the more industrial electronics/electrical peoples here:
I've got a little build on the stocks which requires quite a few wire-to-pcb connections.
The BOM uses TE MTA-156, but those really require a special (absurdly expensive) tool to attach the wires to the female connector.
I'll sodder the wires direct to the PCBs if I have to, but I wondered what other neat, pluggy, inexpensive solutions there might be?
I cultivate a curious garden.
Ok all you electronical gurus.
I've got a diode that looks exactly the same as my known LL4148s but I suspect might actually be a 5v1 Zener.
What can I do (if anything) to check, assuming that my only test equipment is my Middle-of-Lidl multimeter ((which does actually have a diode test setting )?
I do not know if this is a good way to flip USB traces, but now both D+ and D- use one via each, rather than D+ using two vias and the other using none, and both lines are the same length so I don't need any copper rotini to tune the length of one of the legs, so... 
I designed a #SMD adapter board using @kicad and let @aislerhq manufacture them. They are for #SOT23 on one side and #SOT363 on the other side. They bridge the gap of a #solderless #breadboard, so they are perfect for #prototyping circuits or trying out new components - or as replacement for through-hole parts. I soldered a dual diode #BAV70 on one and a dual NPN/PNP transistor #BC847BPN on a second one to try them out. I'm satisfied how they look, although the white area for labeling is a bit small - I need a thinner pen for that.
You can find the shared project here: https://aisler.net/p/UTAGNLYX (trying out this feature, please give feedback if you use it).
#diyelectronics #soldering #kicad #aisler
It turns out I had not, in fact, bitten off more than I could chew, though it has taken me several months, somehow, to get round to finally fettling and racking it, but still.
(Now I can order some more, lol)
#introduction (updated)
Hi #Fediverse 
My name is Bryan.
I’m also a #data analyst (using #python and #R) to make sense of market research.
Sometimes I stream gameplay on #Twitch. Hobbies include #diyelectronics and #slowcomputing.
All links are in my about section if you’re interested!
