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Charge connector
In many cases, the charge connector breaks on the Yamaha batteries, but the BMS is still okay. It...
Yamaha battery
This Yamaha battery we usually see on BH and Haibike. It has a very similar BMS to the Shimano b...
Lowering consumption, Part 2: Software
Measurement setup Yamaha board V1, with only the Arduino Pro Mini and the RECOM 0.5A 3.3V inst...
Lowering consumption, Part 1: hardware
Baseline Current consumption, with the transistors disconnected: 9.82 mA @ 30V 7.5 mA @ 42V ...
Energy use
This is the current waveform in one loop cycle. Higher current when SCI on Lower current when...
MOSFET vs BJT
The good thing about the Version 3.0 of our Yamaha Board design is that can fit both BJT and MOSF...
Board acceptance test
Setting up the test Turn the current off on the DC supplies before connecting the board, o...
Tuning the data output
Purple trace: Yedlik board Green trace: original board We attached a 10k pull-up resistor to ...
Listening to a Yamaha battery
R = 10k Reading Yamaha communication II (13/08) Regarding the Yamaha battery from worksho...
Concept: reverse engineered Yamaha battery
Source: https://endless-sphere.com/forums/viewtopic.php?t=70198 Quote: An Arduino compatible boa...
Troubleshooting
You find yourself with one of these batteries and it just doesn't work? Let's go step by step. Yo...
Current limiting on the data output
On the original board, it is possible to pull the data output to 42V, and the current will be onl...
Avoiding sparking when connecting companion board
When the smart SOC board is attached to the battery, it can produce a decent spark: High (30-6...
BH battery and BMS types
We can use our smart SOC boards for all the bananas, and the non-Brose plastic flat ones. We neve...
Learning about 48V chargers
Some types of chargers for the 48V BH battery show that one of its pins seem to be different than...
Concept
Problem The car originally had 6 pcs of 8V deep cycle lead acid batteries: Trojan T875. They are...
'Banana' 36V/48V
Comes with at least 3 different types of BMS. Almost always 36V, but some are 48V. The 48V charge...
Rebuilding 48V Flat
Module layouts The group 1 is the one furthest away from the BMS. With the 'old method' before...
BH 48V metal
Uses 20700 cells, not 18650. Rare, problematic.
AVRDUDE and the 328PB chip
Generally, it has always been a headache to upload to 328PB chips using the Arduino IDE interface...