German Speed controllers

[razerdave]

Hey guys

On my travels to Germany I found out that one of the German roboteers (Andreas) makes his own speed controllers and occasionally sells them to other roboteers, and I thought I'd share the info with you because, for those pushing the weight, these could be a good solution:



Thats on MY fingertip, for comparisons sake.

Informaton I got from Andreas:

The controller is 10x10mm, and the weight is 0,5grams per controller.
You can connect the controller to a 2s Lipo (8,4V). The (absolute) maximum current is 4amps.
The price is 7€ per controller and 1€ extra for the porto to England.

Having seen these and spoken to the roboteers over there, they are easily capable of running 4 of the HP motors off these things (Banebots are rated to 3A and they handle them easily, so it stands to reason).

He can't send any out ATM because he is awaiting microprocessors and needs to actually make them, but he will let me know when they are available.

[EpicentrE]

These look awesome, but the limiting factor for me would be only taking 2s lipos, as I run pretty much everything on 3s. Still, these would be great for any designs running 2s where the design didn't allow one large board (such as one of Pete's, or a baby-o) and instead needed 2 small boards. For that purpose, they're much cheaper than the Fingertech TinyESCs, and much smaller than anything else available to my knowledge.

I'd certainly be very interested if, in the future, he designs a version which can take 3s .

[earthwormjim]

very nice,and very cheap too!! excellent!
I would defo like a pair to play with.

[peterwaller]

It is the price that impresses me the most but they do look very neat.
Though they are small you still need two of them plus a receiver and regulator plus all the extra wiring, 7 wires to each controller.
I see that Deltang the people who make the tiny Rx31 receivers have started to build receivers with built in controllers.
Although they are only 400ma and 800ma output they do add on boards that can boost that to 3 amps.
The problem is again voltage they only seem to go upto 6 v I will see if I can get some more info on them.
http://www.deltang.co.uk/
I emailed Deltang and as usual got a very rapid and helpful response, apparently the reason the 3 amp booster board is limited to 6V is the capacitor which can be replaced by a 10v one making it suitable for use at 8.4v.
So as long as the receiver is run from 5V you can run the motors on 8.4V.
I shall order some bits and try them out.

[cooldude6617]

why did I spend £80 on banebots:(

[razerdave]

Because these controllers were not exactly advertised, you bought the banebots before I knew about them

[cooldude6617]

oh well

[peterwaller]

Rather than hijacking this thread I thought I would start a new one for the Deltang receivers / controllers.

[marto]

So. After exercising some serious google-fooo.

http://forum.roboteers.org/thread.php?p ... e8ac#74962

Google translate helps.

So few unmentioned bits.
- No Failsafing
- Bang-Bang

The flip flop could potentially be replaced with a AVR-tiny I think but without voltage regulation sausage might get interesting. Though could potentially come from the RC input.

Steve

[marto]

...but without voltage regulation sausage might get interesting.

Ah yes the voltage regulation sausage, auto-correct I hate you.