🎉We can now proudly present the winners of the TAPAS Community Challenge 2018! 🎉
Congratulations to Team "Wireless Charging" (idea 56). We are really excited for all finalists and a really big thank you to all participants for your interest in this challenge!

We got over 200 submissions! 65 ideas got one or more TAPAS boards, 10 submissions were presentation-ready.
And now we have 5 finalists! YEAH 😃 The finalist's idea numbers were 40, 56, 68, 212 and 213.
What's next?
We are now preparing the next steps for you, the community. Please stay tuned!
We are working on a forum and a separate webpage. If you have any question please don't hesitate to contact us via email!

electronical driven Handcart

My Idea is to create a handcart which is driven by one or two electrical motors. I saw once on a hike at may that someone had used a old gras cutter motor to drive a handcart. This is how I started to create the idea.

This projects aims to be a open source do-it-yourself project for getting first experiences with motor inverters, different loads and speeds.


My concept is to start with basics to just drive the motors controlled by a arduino (ESP32) or raspberry/banana Pi.

The battery will be a lead battery because it is cheap or a LithiumIon Battery because it is light weight.


After finishing the first basic build, my plans are to continue to integrate a W-Lan connection for Information display on the smartphone. Also I would like to start working in recuperation for charging the battery up in downhill sections, but till now I have no experience in this field.

Additional thoughts:

- a ultra sonic sensor could check the front to make sure the way is free to drive, if they detect an object the motor control will stop.

- Temperature, maximum Speed and power managment should be controlled from the system

- a control if the operator (user) holds the handle could be implementent on the ESP32 with a Touch-Sensor on the handle

I'm open for additional thoughts and ideas to make it a useful help to transport stuff.


Probably the best result would be if I could receive two TAPAS boards so I can drive the left and right wheel individually. Then there is the posibillity to make turns using the motor control.

  • Simon Perrevoort
  • May 15 2018
  • May 16, 2018

    Admin Response

    this idea will get two TAPAS dev kits

  • Arun Ashok commented
    May 16, 2018 11:56

    Hi Simon,

    Thank you for the idea. Can you provide  schematics and ratings of motors you plan to use and some more technical details like the ratings of your setup?

    Also I see that there is already a similar idea posted in the challenge.You can also try to do a collaboration if you are interested.

    Best Regards,

    Arun Ashok

  • Simon Perrevoort commented
    May 16, 2018 12:38

    Hi Arun,
    my current plans are that I try to drive the wheels with brushless motors. One on the left and one on the right. I still search for a affordable 12V drive which has enough torgue and speed to reach a speed of approx. 20 km/h.

    Ratings I'm aiming for are:

    • 12V Battery because it is easy affordable and good to use with a lot of peripherie
    • max speed of 20/30 km/h
    • Battery life for approx. 3h

    Yes I saw that too but I tought I will create this Idea too :) I have already written him and will try to get in touch with him so we can share knowledge.

    For the "Fun" stuff like ultra sonic sensors and so on, I don't see a real problem because I'm used to programm a lot with arduino in my free time.

    Actually I think the mechanical selection of drives and gear and material will be the hardest choice.

  • Simon Perrevoort commented
    May 16, 2018 13:55

    Update: I might go with a brushed motor like MY1016 from Unite. It has like almost 1Nm with 2700 rpm. If I do the power transmition with a chain to the wheel it could be 1:3 ratio. So I would have 3Nm at ~ 900 rpm.
    If i do it on two sides I have a 500W Power system. Should be enough power to accelerate and keep the speed.

  • Simon Perrevoort commented
    May 16, 2018 14:06

    I forgot to say if I would go with the brushless I would have chosen the:
    NEMA23 57BLF03 188W 24V 3000RPM

    Still need to create some Pro and Cons about both drives. Both look good for me.

  • Admin
    Nora Schille (TAPAS team) commented
    May 16, 2018 15:01

    Hi Simon,

    thanks for the details and updates! :-)
    Congrats. We will provide you two TAPAS boards. One of my colleagues will message you shortly.
    Nora @ TAPAS Team

  • Simon Perrevoort commented
    May 24, 2018 11:49

    I have researched a bit and are already on calculating the motor data and technics to transfer the power and a drivecontrol. I received from a college the idea that we could implement a kind of a self-driving camera to the handcart with a raspberry which detects a object and follows it. Seems to be quite doable. Although because I will be able to adjust the speeds of the wheels seperatly.

    Unfortunally I saw that the competition ends in two weeks and I'm afraid that I can't finish it by then, because of my fulltime job.

    Will keep updates on here, so if anyone has any questions just ask me.

  • Admin
    Nora Schille (TAPAS team) commented
    May 30, 2018 13:43

    Hi Simon,
    thanks a lot for your feedback on the status of your project!
    The final submission date for the presentation of your pitch is the 24th of June so there is still some time left.

  • Admin
    Nora Schille (TAPAS team) commented
    June 04, 2018 14:00

    Hey Simon,

    PS: We want to do a community call with you! Please use our doodle to find a date which fits best for you. :-)

    Nora @ TAPAS Team

  • Simon Perrevoort commented
    June 11, 2018 21:01

    Hi Nora,

    Thanks for the Information. It went to the spam folder sadly. I voted at the poll.

     Update of the current project:

    I got some Litium Ion batteries and are meassuring those to create a battery pack to save weight instead of a car battery. The frame will be build of Bosch-profiles. Instead of my original Motor drive idea i now will take a "wheel chair motor". The advantages are that it has the highes toque and speeds that are usable for vehicles. The best advantage is that I dont need a gear.

  • Admin
    Nora Schille (TAPAS team) commented
    June 12, 2018 07:02

    Hey Simon,
    sounds good. The community call will now be on 14th of June from 5 to 6 p.m. (UTC+2:00).
    We are looking forward to here from you ;-)


  • Jacqueline Hofmann commented
    June 20, 2018 12:44

    Hi Simon,

    Don't forget that the submission deadline for your presentation is on 24th of June! We are already curious to see the results of your project :-) Keep in mind that you still have time to work on the implementation of your idea after the submission!

    Please post your project visualization and all related documents within your idea board entry :-)


    Jacqueline @ TAPAS Team

You can read the official challenge FAQ here!