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Old Jul 06, 2008, 06:38 PM
Mike Fortin's Avatar
United States, FL, Orlando
Joined May 2006
116 Posts
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DIY Brushless ESC

Does anyone know where I can find some info on a Brushless ESC?

I am interested in trying to build one of my own.

Thanks.
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Old Jul 06, 2008, 09:45 PM
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Tomapowa's Avatar
N.E. USA
Joined Oct 2003
813 Posts
Do an advanced search here in the forums for "DIY BRUSHLESS" (search title only). A few that should pop up are:

http://www.rcgroups.com/forums/showthread.php?t=181247
http://www.rcgroups.com/forums/showthread.php?t=181247
http://www.rcgroups.com/forums/showthread.php?t=140454
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Old Jul 07, 2008, 03:56 AM
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UK
Joined Aug 2000
1,082 Posts
I found Bernhard Konze's 'Flea' code one of the simplest to understand. Although my goal was to convert it to a FF timer I put a great deal of effort into commenting his code and it still works as a normal ESC http://www.flyelectric.ukgateway.net/avr_ff_timer.htm

The first few pages of this Microchip paper (AN1160) is quite good at explaining some principles http://www.microchip.com/stellent/id...pnote=en533912

This thread will help you appreciate how hard it was designing these from scratch http://www.rcgroups.com/forums/showthread.php?t=200567

Regards, David.
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Old Jul 07, 2008, 10:51 PM
early retired & loving it
USA, AZ, Kingman
Joined Aug 2005
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REMOVED, posted in wrong area.
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Old Jul 08, 2008, 03:02 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
The Netherlands, GE, Nijmegen
Joined Feb 2001
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Several diy designs:
http://www.rcgroups.com/forums/showthread.php?t=140454

Vriendelijke groeten Ron
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Old Jul 08, 2008, 03:13 PM
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Joined Nov 2007
895 Posts
You may find it much easier to modify an existing ESC. You can add the test points for in circuit programming and just work with the code on an existing design. Or you can replace the FETs with larger and higher voltage FETs to make a much larger ESC from a small one, just start with a design that uses IRF FET drivers.
You can find a smoked ESC and rebuild it, generally only the FETs get smoked or sometimes the BEC circuit.
It is much easier to take small steps instead of trying to gobble the whole thing at once.
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Old Jul 08, 2008, 09:36 PM
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I like the idea of starting with an existing design. There is source code floating around for some of the commercial units.
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Old Jul 09, 2008, 09:46 PM
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Joined Nov 2007
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Since a development system will be needed the difference in cost between a cheap ESC and a processor board is only a few dollars, so why not use an ESC. The lock bits in the micro may be set, I think that means the micro has to be replaced with an unlocked micro.
To build a DIY ESC means working with surface mounted parts so it should not be a problem.
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Old Jul 29, 2008, 04:48 AM
must build something!
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in front of a computer!
Joined Jan 2008
154 Posts
hey guys,
im really interested in the idea of a diy bl esc,ive got and old 12amp bl esc,but an fet on one of the 3 phases blew,could i remove the dead fet an one from each of the other 2 phases?i know it will reduce the amout of amps it cvan take but i only want to run a 4 amp motor on it.can anyone help?thanks.
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Old Jul 31, 2008, 10:27 AM
must build something!
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i think ive wasted my time posting here.
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