New Products Flash Sale
Thread Tools
Old Feb 15, 2015, 08:41 PM
Bruce Abbott is offline
Find More Posts by Bruce Abbott
We want... Information!
Bruce Abbott's Avatar
Hastings, New Zealand
Joined Jan 2001
5,220 Posts
Quote:
Originally Posted by djpilot View Post
I would like to work out if I can use this on some Afro 30A ESC's to run brushed motors and am not sure where to start.
Start by tracing out the circuit to find which pins of the ATMeg8 are used and what polarity signals the FETs require. The Afro ESC looks pretty simple so it shouldn't be hard to do.

Next, edit the macro.def file to match the MCU pin functions to the circuit. Assemble the program (using eg. AVR Studio 4.19) to create a hex file, and download it into the ESC through the ISP pins on the PCB (using a programmer such USBASP).

Finally, test the ESC on a current limited power supply. If you are lucky it works. If not then you have some debugging to do.

One problem you may have - the Afro ESC uses all N-Channel FETs, so I'm betting it uses 'bootstrap' circuits to generate the high-side Gate drive. Therefore it probably won't be able to hold the upper FETs on continuously. You can get around this by not allowing the PWM to go to 100% at full throttle (PWM pulses keep the bootstrap caps charged up).
Bruce Abbott is offline Find More Posts by Bruce Abbott
Reply With Quote
Sign up now
to remove ads between posts
Old Oct 31, 2015, 06:44 PM
rc_ryder is offline
Find More Posts by rc_ryder
Registered User
rc_ryder's Avatar
Joined Aug 2013
12 Posts
Car ESC hack

Hi guys,

I was browsing the web searching for a reasonable priced BRUSHED crawler ESC with programming capabilities like BRUSHLESS ESC.

At the moment the entry level BRUSHED Quicrun1060 at 25$ is by far inferior compared to Hobbyking X-Car 60 for same cash...
http://www.hobbyking.com/hobbyking/s...dProduct=28377

If we go to 120A range, brushed esc start at 100$, brushless esc from hk goes to 35$

Would it be possible to hack one of those?

It would be a great thing for fast growing crawler sceen...

Cheers
rc_ryder is offline Find More Posts by rc_ryder
Last edited by rc_ryder; Dec 09, 2015 at 03:02 PM.
Reply With Quote
Old Nov 01, 2015, 07:44 AM
nifty1a is offline
Find More Posts by nifty1a
Registered User
Joined Jun 2014
1 Posts
ZTW Spider Series 20A OPTO

Has anyone successfully reflashed these ESCs to use as a brushed ESC?

I'm looking for a 6S capable brushed ESC, and I thought these look like a possibility, but I can't find any mention of anyone having reflashed them into brushed ESCs.

If these can't/don't work, does anyone have any recommendations of an ESC to use?

Thanks

Paul
nifty1a is offline Find More Posts by nifty1a
Reply With Quote
Old Nov 24, 2015, 05:44 AM
gzus11 is offline
Find More Posts by gzus11
Registered User
Joined Aug 2015
29 Posts
I've been following this for some time, I can handle flashing the ESC, but I think modifying and generating hex files may be a little being my ability.

I was really hoping to find something built on the afro net range (30amp). Since Simonk's attempt has anyone converted an all nfet succcessfully?

I've built a rough prototype segway with wheelchair motors and cheap brushed ESC, but i find the motors a little slow to balance, and would make use of my spare escs.
gzus11 is offline Find More Posts by gzus11
Reply With Quote
Old Dec 08, 2015, 10:03 AM
murdok is offline
Find More Posts by murdok
Registered User
Joined Oct 2015
2 Posts
ad beep codes to the v2.hex

Hallo kaptainkuk,
i flash the v2 to my rctimer 20esc. It works pretty for me.
The v3 walks also but not so good because the pwm frequency is to low and the motor beeps.
Please can you ad the same beep codes like the v3 for armed and other to the v2 code.
Is it correct the difference between the codes v2 and v3 ist the pwm. V2 with hardware pwm and the v3 with Software pwm.
edit
yesterday i test 3 from the rctimer esc but with one of them i have a problem the point zero is not the same as the other 2 esc.
Can you send me the source code from v2 because i will edit the range from the zero point for my difference esc.
Sorry for my bad englisch
Bye Andre
I see nobody answer me. Can anybody contact mr. kapteinkuk for me.

We look at the source code v2 because my Motor didnt stop at the zero point.
Can anywhere help me to edit a deathband around the zeropoint.
murdok is offline Find More Posts by murdok
Last edited by murdok; Dec 26, 2015 at 04:22 PM. Reason: Seit Assembler Code
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Brushless ESC with a brushed motor soprano1 Power Systems 7 May 05, 2012 02:10 PM
Discussion ESC - brushed/brushless emeraldPark Electric Motor Design and Construction 1 Mar 14, 2012 10:13 PM
Found WTT: My Pro Boat Brushless ESC for your Pro Boat Brushed ESC Diegoboy Boats (FS/W) 12 Dec 23, 2011 10:48 PM
need reversable speed control with no delay aaronredbaron Power Systems 0 Jul 31, 2003 05:40 PM