Free Motor Controllers!

Budget_V2.JPG (111630Bytes)

I am currently designing some very budget friendly Motor drivers, and to test the design out, I am giving away 10 free drivers! Each driver is a single or possibly dual (5 single and 5 dual) transistor based design, and cost per board is very, very low. If you would like one of these free driver boards, please post in the forum below. No restrictions! Each board ships with a application note so you know how to use it.

A few specs:

Max Voltage: 30V

Max Amperage: 0.6A

The design is called the "Smokable" Transistor H bridge, because if you turn both Transistors on a single side High, you can "smoke" the H bridge, as it'll create a direct short across ground. Basically, don't drive both sides high. It requires 4 GPIO to control, and allows for High Side and Low Side Braking, as well as coasting.


********************************EDIT 2**************************

Did a update on the board, this one is actually manufacturable quality. I will etch the board today and see how it turns out. I decided to make 10 Dual Controller boards instead of half and half. When I recieve your shipping information and 5 dollars for shipping, you will recieve your board and a confirmation that it has been shipped via USPS. No international shipping atm until I can figure out your individual cost.

I have plenty of parts on hand, but I do not want to pay for shipping. Therefore, when I recieve your shipping information and funds via paypal your board will be shipped.

One dual

I would like one dual to use on a tank my friend is making if it isn’t a problem for you to send it in Croatia.

The motors must be very low

The motors must be very low draw, under 600MA I should add.

Hi Krumlink,thats a very

Hi Krumlink,

thats a very generous offer.  

I can not promise I would use it in a robot right away upon receiving, but I will certainly help test it out.  I’m using BS2’s right now, so I can give you feedback on how that goes.




Awesome. I really need a

Awesome. I really need a better motor controller. I hope to win one. Cheers.

Well the first 10 people to

Well the first 10 people to request one get one, so far all 3 of you will recieve one.

Hey Krum

I want one of these for that gearbox I got.

thanks :smiley:

thanks :smiley:

yes please

id like one

Free motor Controllers!

i want to know if the pcb is double or single side, and if there is any possibility to share the pcb, i’ll etch it. The shipping to my country would cost maybe 10 times the price of the board.


i really need one


The board is single sided,

The board is single sided, and I will share the eagle files as soon as I have the design how I like it.

**Hello **

I would appreciate one.


Do not have anything yet,

Do not have anything yet, but intend to build a tracked robot sometime in the coming couple of months. Given my lack of funds a free motor controller would be awesome (especially if it was a dual motor controller), but probably less than useful to you given my inability to actually do much testing immediately.

Never Mind

My parents would never let me get a paypal account, therefore I cannot pay for shipping :frowning:

Your probably one of the

Your probably one of the most generous persons in here Krumlink!

Even though I don’t need a motor controller I had a look at your layout picture and have some comments;
• There are still some 90 deg bends that you should try to get rid of.
• The traces for the control signals seems very thin, I would recommend a thicker trace as there is plenty of room.
• There seems to be a very thin trace between the two copper islands on the diodes (look at my picture)


You might also tidy up the copper pour as there seems to be some white spots around.
Have you tested this board over time with you max rating?

None for me then

Well then they are too weak for the tank, it will be using drill motors, but still, thank you for giving out free stuff, people like you make the world better place =)

Thanks Andersen! Yeah I

Thanks Andersen! Yeah I wanted to finish up the board quickly so I let autorouter finish it. Never again. Also I set the isolation too high for the copper pour so it left alot of white spots.

2nd Revision is done, take a

2nd Revision is done, take a look.

That looks much better.Just

That looks much better.
Just one thing. I don’t know if the header row can be rearranged or if it’s fixed to match something? But if you can I would have re-routed the pins in my picture so that you don’t have to go in-between the pins.
No biggi.