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  1. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    Currently it is sinewave and switches to block at higher speeds for more torque. My direct drive is a 154mm with 18 stator poles and it runs absolutely silent. So far my ebike life was only with block controllers, thus this was a revelation. It really gives a totally new feeling to the bike...
  2. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    It's been a while since the last update - mostly I have been happily cycling. The controller has now been running with up to 1000W @ 48V and I also made a second version with better MOSFETs which does up to 2000W peak. As I usually use a road bike this is more than plenty! I've made a first...
  3. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    This is my first project using KiCAD. After getting used to the few quirks it has it has become reasonably fast for me to create a PCB. In the US you have oshpark to get prototype PCBs for little money. I use a mixture of European and Chinese manufacturers. One thing I like on KiCAD is the fact...
  4. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    Attached is the schematics file. The half bridge drivers are IR2104 with a fixed dead time of 520ns and around 200mA gate current. The design has no shunt but uses an ACS712 for current sensing on the low side. It can measure both positive and negative currents. The DC converter is a Texas...
  5. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    I didn't know the 32M1 nor did I know about the power stage control unit. What set me onto the track of the Atmega8 family were existing designs. All the cheap ESCs from Hobbyking for quadcopters use Atmega8 chips. They have much higher RPMs than a ebike motor thus I assumed they are definitely...
  6. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    I just happen to know the Atmega microcontrollers. Also they are robust and with about $1.50 per piece not very expensive. You can't do FOC with them but you can do block and sinus. I currently run the controller with block commutation and hall sensors. The main loop of the firmware runs still...
  7. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    Thanks LockH, fixed that with the regen. Being german I had "recuperation" in my head and I know that that is definitely wrong. Either way it is a key feature for me as there are mountains everywhere here. The controller can be set to the KV of the motor in order to avoid drag when just normally...
  8. C

    Hacker's connected electric bicycle

    Hackaday is quite a bit a different audience from ES. It's my project thus thanks for posting it here. I have opened a thread https://endless-sphere.com/forums/viewtopic.php?f=30&t=88818 with a title more appropriate for ES and am happy to answer questions and do more updates. Actually the...
  9. C

    DIY controller 48V/1000W with bluetooth Atmega328PB

    A bit a learning experience I have started working on a controller two years ago. Target is a mostly road legal bike for Europe, i.e. with speed limit, power limit and pedal sensor. Main features are: 48V / 1000W based on Atmega 328 microcontroller ("Arduino") block or sinus + eventually...
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