Let's Make Robots!

DAGU Promotion, Cheap HW, LMR Mr. Basic Special LMR version + 3 prizes!

Update: --== DAGU ROCKS ==--


Update: NEW manual attached! Replacing old one. Sorry for the format, PDF was too heavy :)


 Hi dear fellow robot builders, members of LMR.

As I am sure you know, OddBot has made us some cool contact with Jack from China, the guy behind DAGU Electronics.

Now I also had some talks with Jack himself regarding a production of some of my stuff (Thanks Odd).

And I tell you, the guys at DAGU moves fast, sends money as promised, and the hardware is actually REALLY NICE! 

And I am NOT just saying this because he is supporting us, I have tried quite a lot of HW that people wanted me to promote on LMR, and it was not all that good ;)

However - now I just got this cool mail from he’s assistant, Claudia:

Dear Frits,
How about these days?
This time I'll show you a great kit, named Mr. Basic, consisting of a aluminum alloy chassis with an extension PCB, which provides a reliable expand platform for DO-IT-YOURSELF. You can find the photos of it in attached files.
So far, we just have Chinese package for Mr. Basic, but there are English user manuals, so everybody can assemble it with his own hands depending on the manuals.
For Chinese market, our original idea is letting all robot hobbyists can create their own robots with our Mr.Basic.So Jack thinks this product will also be a good choice for the members from LMR.
We are excited about your idea about "LMR members editon", so we would like to offer 50 sets Mr. Basic printed with LMR logo with a special price only for LMR members, it just cost them 22USD($15 per set and another $ 7 for shipment) to own one. Every member who bought one and designed a new variation can put their creatures on LMR, and you can let other members and users vote out three best ones, each winner will be offered $100 from DAGU as prize.
What do you think about the above idea? Hopefully waiting for your respond.
Kind Regards,
Claudia

 

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This is cool!! Those things are almost like free at that price! And it is our first real LMR merchandise! :)

What you need to do to participate:

  1. Send a mail with your order (and address) to Claudia:

    claudiadagu at yahoo.com.cn

    Let the subject of the mail be "
    LMR Mr Basic" She will return to you, be fast, only 50 made.

  2. If you feel like using your Mr Basic Special LMR-version for more than a mantelpiece, then make some robot out of it. Submit it as a robot on LMR.

  3. IMPORTANT: TO make sure that you participate in the competition, you must add the tag “LMR DAGU Contest” to the posting.

  4. Vote for your own robot. (I know you are going to do so anyway) - But also; Vote for other robots that you think should win!

  5. Wait for everyone to be finished and cross your fingers :) We make a special page for this, with all participating robots, and the 3 robots voted highest will each win the price of USD 100!


Yes!

 

PS: Since this is going to be won by robots only seen on the page, good images matters as well as cool robots. I just know from experience. For inspiration, see this that I wrote once :) (The part about taking good pictures)

PPS: Thank you OddBot, Jack, Claudia, and DAGU! Nice going! :D

PPPS: You are a very competent person.

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How about 2 MOSFETs and 2 relays?

The MOSFETs are not needed if the motors won't respond to PWM.

Basically, if the motors will only operate with a very narrow range of PWM, say 80 to 100% duty cycle and that there is very little variance of speed within that range of PWM, there isn't much point in applying PWM to them. It would then be simply better to switch them on and off. Still might be good to have flyback diodes to protect the relay.

A test of performance would include a variety of PWM frequencies, and stepping through duty cycles at several given frequencies.

Wow, I cannot believe it's been a year since.

I tried the Mr basic Motor driver board (design by Oddbot). And experimented with different frequencies and duty cycles. Just as you predicted, only duties above a certain level would make my robot go. I tried frequencies as low as my unmodified picaxe would generate: 4000 Hz.

Maybe lower frequencies (500 Hz?) will work better.

Petroleum jelly and lots of it! Yes I am thinking higher voltage even, with PWM and reverable directions through mini relays.
Your Basic Walter motor controller I guess.

Rik, your so FUNNY!

Thanks :D

Rik, 

How much did you have to drink before filming? 

Nope, that is me sober. Ethanol make me sleepy.

Do you really think that anyone will believe that? Although I do work with a dutch perl-hacker and he also makes strange noises and speaks in tongue even though he is perfectly sober :-).

Great video, rik! Keep'em rolling!

I am inmpressed with the quality of the kit, but the version I received only has the back 2 wheels driven, I am missing the axles for the front wheels and a few other screws.

Anyone elso have the same problem?

Can someone post a photo oif the undeerside of the kit that they actuyally built? 

Myc 

 

 

1069-e1_underside1.jpg

1069-e1_underside2.jpg