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Category: Arduino

Ebikes – DBMS issues with counterfeit parts

Posted on April 6, 2018April 6, 2018 by Dave

The DBMS worked fine for 50 or 60 km, but the behaviour of the various components – batteries, motor and controller and DBMS started to get erratic, and it started to get difficult to tell what was going wrong. I slowly removed items until I was back to a normal set up on both bikes,…

Ebikes – dual battery managment system more riding.

Posted on March 17, 2018March 24, 2018 by Dave

Two more days of testing, a week apart, building on the numbers from day one. Total kilometres over the three days 66.4  and total time on road 3h22m, giving an average of speed of 20kph or thereabouts. The bike was definitely starting to get sluggish towards the end, and the gauge on the bike was…

Ebikes – dual battery management system – first rides

Posted on March 14, 2018March 14, 2018 by Dave

I have waterproofed both the DBMS and the power meter, so am feeling a bit happier about going out for a ride or two. I did my first ride just after I finished the basic unit, but it was all a bit short and hilly to get a grip on what was happening. I had…

Ebikes – dual battery management system – build and install

Posted on March 9, 2018March 9, 2018 by Dave

Build After a few months of designing, prototyping and waiting for all the components to arrive, I finally had enough to build a working, install-able prototype of my Dual Battery Management system. It is still a prototype, and like all prototypes is too big, too heavy and too expensive. I am not an electronic designer,…

EBikes – Dual Battery Management System

Posted on January 3, 2018March 9, 2018 by Dave

The only commercial developer of dual battery electric bikes I have seen to date is Bosch, who do an optional Dual Battery kit, which one or two manufacturers have taken up. Being proprietary technology, there is not a lot out there about it. The only two things I can glean are: 1. The real technology…

Arduino – multi-cell voltmeter

Posted on November 9, 2016November 9, 2016 by Dave

Right at the start of the saga which is my multi-cell voltmeter/potential BMS, I considered and rejected the simplest way of doing this, namely using voltage dividers to drop the voltage from the cells down to within the range of the Arduino analog to digital converter, and connecting all 16 cells to 16 analog pins…

Arduino – multi cell battery voltmeter progress

Posted on June 8, 2016 by Dave

As reported in the last post on this topic, I soldered headers onto the two 16 channel MUX and started testing. Since then I have spent a bit more time trying to get it all to work. The major change was simplifying the code not to use Port manipulation on the arduino. It all looked…

Arduino – voltage drop

Posted on June 3, 2016June 3, 2016 by Dave

I started working again on the multicell voltmeter, I soldered some header pins onto the two 16 channel multiplexers, and plugged them into a breadboard with arduino. Some basic testing proved that my optimism was completely unfounded. So using best testing practices, I peeled off layers until I got to the bit that worked, and…

Multi Cell Voltmeter

Posted on October 17, 2015November 12, 2015 by Dave

The big order of Arduino related products has started to arrive, the key components, the Arduino mega 2560 clone and the TFT LCD screen arrived two days ago, along with some of the voltage sensors, and most of the jumper leads I ordered. Still to come are the protoboard for the Mega, a breadboard, some…

New Project – Electric Bikes, Arduino and Programming

Posted on October 3, 2015October 5, 2015 by Dave

Exciting times – a new project, bringing together Electric Bikes, Computers and Programming! During my troubles with batteries (which are pretty much sorted now) I realised I needed a way of looking at the voltage of all the 12 cells, not only while charging, but also while traveling on the bike. I have some 6…

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