Time to crack open the Eachine Touch T100 Charger.
Eachine Touch T100 7A 100W AC/DC Balance Charger Discharger For LiPo/NiCd/PB Battery
http://bit.ly/2bvKKd1
Banggood 10th Anniversary: http://bit.ly/2birrAq
Eachine Touch T100 7A 100W AC/DC Balance Charger Discharger For LiPo/NiCd/PB Battery
http://bit.ly/2bvKKd1
Banggood 10th Anniversary: http://bit.ly/2birrAq
Sorry it should read cpu
The country could be an add on because of wave soldering
The microcontroller is probably on its own pcb because they used a commercially available one and just built the rest around it. I'd guess it was originally designed for monitoring a lot of sensors in an industrial application which would explain all the inputs and all the unused pads in this case.
did you notice that the chips on the lcd side, where melted a bit?
The reason for the small seperate CPU-board is to save costs. A dual load (SMD components on both sides) are pretty expensive to manufacture. Also, space is a premium in pick&place machines, so if you can make a panel of these CPU-board and stuff them all in one go in the P&P you save on machine costs. Also the modules can be tested beforehand. The rest of the charger PCB is made in a very different kind of soldering process, so it give very much sense to have the CPU-board seperate. The 324-devices are LM324, quad comparators. They are used to measure the voltage of each cell in the balance chain.
Tip: if you are in a pinch, blackboard markers or chalk works okay on laser engraved chips.
ThankYou!!!
It's possible that the large board has a heavy copper layer that can not support fine pitch parts, so they have implemented the cpu and small parts on a seperate board for that reason.
Ffs.. The discharge part is… Dunno.. Stupid.. Why would you even try to cool it like that.. And also.. I think that AC/DC chargers are crap anyway.. (unless they are expensive) they always seem to tend with space problems.. In this case.. Dunno what to do with heat.. Why on a little aluminum plate…why
the balance sense circuit on the back could be 6 opamps – 4 in one package and 2 in the other, smaller one. Resistors/caps are the passives for the opamps.
I was hoping youll check to see what the display was… It kinda looked like a smart display like a nextion. Or that other company ive forgotton… 🙁
The CPU looks like some sort of dev cpu like arduinos… Maybe something that has been converted for running a battery charger?
i think the cpu board is raised because they can then manufacture only a small board with small tracks to get down the price, as the smaller clearences make it more expensive to make.
If that processor is one that's fairly easy to program for (Atmel or maybe STM32 or something like that) I'd bet if these get popular there'll be custom firmware for it pretty soon.
Truly speaking, I'm disapointed. The charger seems to be generic one, like Imax B6 and all its clones and spin-offs, the elements on pcb and pcb itself speaks for it. The only one thing, which is the user interface, looks like new feature, so all they have to do, was put more powerful processor, to serve the touch screen, and to plot basic data. Even window zooming seems to be not implemented, so the full scales of voltage and current are displayed even if actual needs are only percentage of them. What a shame! I'm seriously doubting if any improvements in charging/discharging/balancing algoritms are introduced, so are tolerances in voltages and currents measurments. Meh, I wouldn't buy it now, when I've seen its guts. Nothing new, nothing innovative, since it's precursors mentioned at begining. But thanks for a nice video, Julian!
subtitulos en español maestro ,,igual es un placer escucharlo,abrazo
Unusual design for this product. A single STM32 could of been handling both the display and the analog part. There is nothing special about that small cpu module, those are probably series protection resistors for the io's but they could also be ferrite beads for filtering. There are several reasons for using a separate cpu module, first they could be getting it cheaper, ready assembled like that, because if you need 4 layers to route and decouple everything it's much cheaper to have a small 2 inch module, than to have the whole board manufactured with 4 layers. Second the assembly cost and procedure can be simplified when using SoC modules like that because you don't have to pick and place small 0402 components, or you don't have to solder high density LQFP packages.