Recent content by kdog

what happens when you change gear, or coast, or even if its a fancy fixy then the chain slack is way to much slop....itll de-synchronise.

a while back i built an electric kick bike with a 26" front and 20 on the rear. had a 48 v system with a mac hubby. it was an absolute blast. only lasted Bout a month bc my then 9yo son figured out he could jump it and after days of incessant gaps the mac died :lol: there are some DH versions...

for future reference here are the wiring diagrams for 3 &4 s heltech smart bms.

awesome, that worked, thanks eee291. annoying that the wiring guide is nowhere to be found for these 3-4 bmss. now I just need to get the pesky bluetooth and app to play.

thanks eee291, that's really useful info. I was wondering about that but reluctant to try it... I'll find some time in a few hours to give it a go.

I can't find anywhere that suggests for a 3-4s heltech smart bms that it should have 6 sensor wires with the last two going to B+. (pitmix if this is what you meant it was unclear)...sure for their higher cell count bmss some of the leads are augmented including the most positive two, but for...

tried charger wake up after reading in the manual about deep sleep mode for storage needing charging to rurn on, but it didn't when presented with 15v across power leads (Same port style). this was annoying to do bc my rc charger won't activate unless it detects an acceptable voltage, so I used...

wiring as follows (there is no wiring diagram specific for this unit on their website, but a generic upto 8s diagram) black lead 1-neg 1st cell. lead 2 -pos 1st cell lead 3- pos 2nd cell lead 4- pos 3rd cell lead 5-pos 4th cell. I've built dozens of batteries before so this is not the first...

this is the one. Heltec 12V Smart BMS 4S 3S LiFePo4 bms 12V 50A 100A 200A Li-Ion LTO bms balance APP LCD RS485 https://a.aliexpress.com/_mMf6WkG their 3-4s are separate from the rest of the higher S counts. it's stamped 3-4s ad has 4 balance channels on the pcb, so it seems to be 4s. and yes...

hi all does anyone have experience with the heltech Bluetooth bms's. I've wired up a 4s li-ion 100a unit but it won't turn on (no smoke yet :wink: ) I have the display and bluetooth module connected but these seem to have no power. one outstanding issue is they sent me a 6wire sensor plug which...

nanograf have released a new lithium silicon 18650 supposedly in production... https://www.globenewswire.com/news-release/2022/10/20/2538446/0/en/NanoGraf-Sets-New-Industry-Benchmark-for-Most-Energy-Dense-Lithium-Ion-18650-Battery-at-4-0Ah.html 4.ah and slightly higher nominal voltage giving...

Have you read this thread, could be useful. https://endless-sphere.com/forums/viewtopic.php?f=28&t=56899

Hi bobbygee It's unlikely to be the battery especially if it's not happening under high power situations....so don't go replacing that yet. I'm trying to remember what the issue was but I think, I ended up replacing both the throttle and the controller board. this is built into the motor in...

25mm2 seems pretty light on for 150amp draw, I think that chart allowed for a 50deg temp rise in the bus bar (was blurry and couldn't read it on my Ph) . A quick Google puts rule of thumb bus bar thickness for copper mm2= A/1.2 So 125mm2 for continuous draw at 150amps. Ie ~12x10mm copper...

This: "Plasma Kinetics employs a layered nanophotonic structure with proprietary shape memory alloy that interacts with light" My BS radar is dinging off the chart! Light controlled release of H2 (stored at stp) :mrgreen: