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  1. avandalen

    Ergonomic thumb switch for e-bike throttle control and electronic gear-shifting

    Efficient speed control is crucial for a comfortable and enjoyable e-bike riding experience. In this article I present an innovative solution for speed control through an ergonomically designed thumb throttle switch...
  2. avandalen

    Bad MKEPA Li-ion batteries for sale on AliExpress

    In 2023, I bought a 10S4P 36V 20000mAh 18650 Li Ion battery from MKEPA at AliExpress. However, the battery had many shortcomings that I will tell you about in my article: MKEPA review
  3. avandalen

    Dangerous MKEPA Li-ion Battery Pack

    I disassembled my 10S4P MKEPA Li-ion battery pack and found out that it is unsafe as the individual cells are directly glued together without the use of additional plastic spacers. This poses a considerable risk of short circuits. This vulnerability arises from the potential wearing down of the...
  4. avandalen

    Torque simulation controllers do not control torque

    Torque simulation controllers do not control torque In recent times, there has been a surge in the marketing of motor controllers as torque simulation controllers. This led me to assume that these controllers control the motor torque rather than its speed. However, this turned out to be false, I...
  5. avandalen

    First custom carbon fork special made for hub motors

    Carbon forks are not suitable for direct mounting of hub motors. That's why I want to have strong carbon forks made especially for hub motors. Because expensive molds have to be made for production, I will sell this fork also to other people, otherwise it will be too expensive for me. If you are...
  6. avandalen

    Xiongda 2-speed hub motor for building lightweight 250W ebike

    I want to build some extremely lightweight 250W e-bikes and I've figured out which motor is best suited to achieve this. The best motor according to my research is the Xiongda 2-speed hub motor. See my article here...
  7. avandalen

    DIY Ergonomic e-bike thumb throttle switch

    To control the motor power of my solar bike as easy as possible, I have developed an ergonomic e-bike thumb throttle switch. It needs just a small thumb movement. See the article here: https://www.avdweb.nl/solar-bike/mechanical-issues/diy-ergonomic-space-saving-e-bike-thumb-throttle-switch...
  8. avandalen

    Help needed with development IR compensation for BMS

    When charging batteries very fast, the BMS stops the charging process too early. In this article I tell why this happens: https://www.avdweb.nl/solar-bike/electronics/battery-management-system-bms-with-internal-resistance-ir-compensation. Here is a way to provide an existing BMS with IR...
  9. avandalen

    Help needed with development fast battery charger

    I came across a remarkably lightweight 36V 5A battery charger on Amazon. The power of the Amazon charger is 210W, but I suppose that it can be increased to 500W or more by changing the frequency and the windings. See this article for all information...
  10. avandalen

    Improving the software of the EBC-A40L battery tester

    I want to use the EBC-A40L battery tester to test batteries at fast charging, see the full article here: https://www.avdweb.nl/solar-bike/batteries/fast-charging-battery The software is limited to just 3 fixed measurement methods. I would like to have the following additional control commands...
  11. avandalen

    The efficiency of the BLDC motor Tongsheng TSDZ2 and Astro 3205 compared

    How good is the brushless DC motor that is being used inside the Tongsheng TSDZ2 ? To answer this question, I have compared the TSDZ2 motor with one of the highest quality electric motors available: the Astro 3205 from Astro Flight. This is what’s Astro Flight tells: The goal with the 32XX has...
  12. avandalen

    S-KU63 vs S06P controller at bmsbattery.com

    What is the difference between the controller S-KU63 and S06P? I think they are the same I asked this to BMSBattery but got no answer. https://bmsbattery.com/home/1021-s-ku63-torque-simulation-controller-24v36v-15a.html...
  13. avandalen

    What means "torque-simulation" at bmsbattery.com?

    The term torque simulation is confusing. Is true that means that the motorcurrent is proportional to the throttle voltage ? I asked this to BMS Battery but got no answer.
  14. avandalen

    Yamaha hacking dongle to use 3rd party batteries

    Yamaha PW series mid-drive motor hacking dongle to use 3rd party batteries Please post your questions about the Yamaha dongle here. See the full article: https://www.avdweb.nl/solar-bike/batteries/battery-hack As with other brands, the Yamaha PW series motor doesn't allow to use any 3e party...
  15. avandalen

    E-bike mid-drive motors hardly outperforms hub motors

    I wrote an article where you can read that a mid-drive motor hardly outperforms a hub motor. https://www.avdweb.nl/solar-bike/hub-motor/mid-drive-vs-hub In practice there is no significant difference in performance. You can clearly experience this yourself during test drives with both kind of...
  16. avandalen

    2-wire control bus for ebikes

    E-bike cable killer 2-wire control bus See the whole article at my website: https://www.avdweb.nl/solar-bike/electronics/cable-killer For my solar-powered bicycle, the Maxun One, I have developed the ebike cable killer. This is a 2-wire control bus for e-bikes. Since just 3 wires are needed...
  17. avandalen

    Improve Yamaha motor efficiency by better windings

    The 250W Yamaha PW-SE and PW-X2 motors are not optimally wound, there is room left. Winding to 100% will give a better efficiency. See my website here: https://www.avdweb.nl/solar-bike/hub-motor/yamaha-pw-se https://www.avdweb.nl/solar-bike/hub-motor/yamaha-pw-sx2 See more about motor-tuning...
  18. avandalen

    Mid-drive motors of 250W compared from a mechanical viewpoint

    I have a new article where I compare all mid-drive motors of 250W compared from a mechanical viewpoint. https://www.avdweb.nl/solar-bike/hub-motor/motors-compared All mid-drive motors have about the same characteristic It is important to know that, from a mechanical viewpoint, all well-built...
  19. avandalen

    Yamaha PW-SE mid-drive motor tear down

    I have dismantled a Yamaha PW-SE mid-drive motor and looked what's inside. See here for my article about the Yamaha PW-SE: https://www.avdweb.nl/solar-bike/hub-motor/yamaha-pw-se
  20. avandalen

    Bluetooth BMS with IR compensation

    For a small production of solarbikes I need a Bluetooth BMS with internal resistance compensation. I can't find anything on the web. I charge the 36V LiFePO4 at 8A, without IR compensation this is not possible. Ubattery = U open + Icharge * RI. There has to be compensated for Icharge * RI. I...
  21. avandalen

    Bosch Active Line 3 motor graphs

    In my article about the Bosch Active Line 3, I have added the motor graphs. Read the article here: https://www.avdweb.nl/solar-bike/hub-motor/bosch-active-line-3/bosch-active-line-3 We can see here that the internal motor is a 19V motor, not a 36V motor as expected. It is not clear why Bosch...
  22. avandalen

    Wanted lightweight Ebike maximum 16kg / 35lbs

    I want to build a second Maxun One solar bike. The total weight including solar panels must be less than 18 kg. Actually, I wanted to let make a special aluminum frame, but maybe there are lightwight ebikes that I can rebuild. http://www.avdweb.nl/solar-bike/solarbike/maxun-solar-bike These...
  23. avandalen

    Bosch Active Line 3 mid-drive motor tear down

    For my solar powered bicycle, the Maxun One, I designed a very powerful and lightweight mid-drive motor. I also wanted to investigate whether I could use a Bosch Active Line 3 motor. The Bosch motor weight is 2975g, this is relatively lightweight for a mid-drive motor, but it is still too heavy...
  24. avandalen

    Sensitive Hall sensor for wheel speed measurement

    Bicycle speed measurement is generally done with a spoke magnet and a reed relay sensor. If this is done on the rear wheel, there is a large spacing between the spoke magnet and the chain stay, where the sensor is mounted on. Therefore, the sensor has to be mounted on a relatively long bracket...
  25. avandalen

    Astro 3205 motor on Cyclone planetary gear

    Because the Cyclone mid-drive motor has a low efficiency, see http://endless-sphere.com/forums/viewtopic.php?f=30&t=66278, I want to use a 3205 Astro motor instead. The Astro 3205 motor has an efficiency of 90% to 95%; I have checked this with the motor parameters. The Cyclone planetary gear is...
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