Suggestion for Open Propeller Project #5

Capt. Quirk

My interests are in motors and speed controllers, and I have had ongoing projects with all aspects. I have spent time working on understanding
commutation, programming, motor winds, motor testing, designing and making smd boards, an smd oven, and learning what I need for a decent
first oscilloscope, etc. The project is to big.

I know there is many of us here that would love to have a Propeller in a bldc speed control.

I am proposing to use Takao Shimizu's methods, code, and schematics as a baseline. I believe the Propeller would work if it was configured with
a schmitt trigger (instead of a comparator), and a mcp3204 adc. Lately his schematics have been using inductors in series with gate resistors to
reduce bounce.

Takao has been providing his methods, code and schematics for over 11 years now, and he created many documents to explain his methods. There
has been a few people ask to use the code, and his answers were always positive. Takao has been generous with all the information he has released
over the last decade.

I believe that it may be necessary to maintain another thread on RCgroups to support the project, and to help bring in new people to the Propeller and
its capabilities. It may be good timing for this, as I believe the capabilities of common micros are being maxed out.

Takao's boards are generally expensive to build, they have a few expensive components, like: Max662a used to drive the gate drivers with 12v. If Parallax
could produce the boards at a decent price, perhaps this will make Takao's efforts more accessible? Create C, Spin, and Pasm baseline code based on
Takao's original Arduino C code, and later give us the flexibility to create our own.


BLDC controller --- Note: Takao doesn’t begin posting until post until post #1000
http://www.rcgroups.com/forums/showthread.php?t=200567&page=83


BLDC controller image and schematics gallery
http://www.rcgroups.com/forums/thumbgallery.php?t=200567&do=threadgallery&type=img&group=none&starter=no


BLDC controller files, code, and schematics gallery
http://www.rcgroups.com/forums/thumbgallery.php?t=200567&do=threadgallery&type=files&group=none&starter=no


Brushless 2-Phase schematic and code
http://www.rcgroups.com/forums/showthread.php?t=70373

One hour CD ROM construction 1
http://www.rcgroups.com/forums/showthread.php?threadid=127606

One hour CD ROM construction 2
http://www.rcgroups.com/forums/showthread.php?t=174595

One hour CD ROM construction 3
http://www.rcgroups.com/forums/showthread.php?t=204419

One hour CD ROM construction 4
[URL=" http://www.rcgroups.com/forums/showthread.php?t=212576"] http://www.rcgroups.com/forums/showthread.php?t=212576[/URL]

One hour CD ROM construction 5
http://www.rcgroups.com/forums/showthread.php?t=218494

One hour CD ROM construction 6
http://www.rcgroups.com/forums/showthread.php?t=227915


Graham Stabler:

Graham has collected a number of great small, and micro motor projects. If you want to make your own micro quadrotor, you could use
one of these very simple bldc motors with either a simple brushed type speed control, or the 2 phase speed controller by Takao.

Micro Thread Index
http://www.rcgroups.com/forums/showthread.php?t=84771


I also have the entire 2600+ posts of the BLDC controller thread in a searchable pdf. The book of schematics and diagrams
are missing a few recent entries.