I’ve had a few people contact me about V4.40 orders they have placed with JLCPCB.
In production JLC are sometimes swapping part D2 around (rotating it).
If you have ordered from JLCPCB, please check any boards you have had made.
The D2 part should be like in the picture, with the “stripe” towards the right handside of the board, near the “+” sign.
Definitely check before applying power to the module, as an incorrectly orientated diode will cause a dead short across the terminals, probably leading to the fuse going, or something melting!!
There is also a GitHub issue open for more information.
Looks nice, the temp sensor you break off then solder cables to the module itself i pressume ? I was thinking ordering a small board like that just for that purpose since soldering cables to a SMD component is just messy. What’s with the hole on the module ? For cooling ?
Thanks, unfortunately as per this forum topic, there is a lot of confusion on this particular part, sometimes JLC place it 180 degrees, sometimes zero degrees.
Unfortunately for you, you will need to unsolder and flip it over, or just remove it completely.
Don’t connect to a cell before doing this - otherwise it creates a dead short.
It’s there to avoid spikes, electrostatic discharge etc. If you are going to the hassle of unsoldering it, you may as well just flip it over and solder it back on. Its quite a large part, so not difficult to solder.
Just did a bit of research, these parts are meant to be similar, all marked SMBJ5.0A, all the same size/footprint (D_SMB) however when placed via JLC, the + and - is flipped!
C10204 + on right
C294856 + on right
C113974 + on right
C357965 - on right
C473804 - on right
I’ve just updated the PCB silkscreen to assist with a “stripe” marker.
I feel like there are letters all over the silkscreen. I’ve also tried pluses and little arrows, they weren’t as clear for me.
Also that leaves some space if I wanted to say what color the led was/is.
If you are wondering, I’m making the new controller board easier for me to assemble and use. It’s still in progress though. I’ve moved the vias that were directly on top of a pad and gave some tracks a little breathing room along with changing the jst-ph connectors.
