SG Crawlers Forum
Search
 
 

Display results as :
 


Rechercher Advanced Search

SGCrawlers - Crawl & Trail videos
SGCrawlers - Bash Tour Drift videos
Who is online?
In total there are 17 users online :: 0 Registered, 0 Hidden and 17 Guests

None

[ View the whole list ]


Most users ever online was 57 on Fri 23 Sep 2016 - 12:58
Latest topics
» 22072017 track 6 night
by boolean21 Yesterday at 10:30

» Newb's Wild Truck
by boolean21 Mon 26 Jun 2017 - 14:01

» A new addition
by boolean21 Mon 26 Jun 2017 - 14:01

» Newbie Build on my SCX10
by babyboy Sat 24 Jun 2017 - 21:57

» [VIDEO] Scale 4x4 Trucks Offroad Adventures RC Range Rover defender jeep G Wagon Bronco
by boolean21 Sun 18 Jun 2017 - 20:47

» Hi there. I'm Max ^^
by staypuft Wed 14 Jun 2017 - 10:23

» [Scale Trails] Woodgrove Ave - Sunday 11 Jun 2017 0900hrs
by boolean21 Sat 10 Jun 2017 - 23:22

» [Offroad Trails] Offroading at Tampines Quarry 04 Jun 2017 - 0900hrs
by boolean21 Sat 3 Jun 2017 - 10:37

» Police LED Light Connection (Newb Question)
by laneboysrc Fri 2 Jun 2017 - 14:03

» [VIDEO] RC Offroad 4x4 trucks offroad expedition 4WD adventures!
by boolean21 Fri 26 May 2017 - 21:26

» [VIDEO] DIY Smartphone-configurable RC transmitter
by boolean21 Wed 24 May 2017 - 21:18

» [Bashing] Woodgrove Ave - Wednesday 10 May 2017 0900hrs (Public Holiday)
by boolean21 Mon 8 May 2017 - 23:19

» Newbs! From Sengkang
by staypuft Sat 6 May 2017 - 13:08

» Tamiya Spray Cans For Cheap Sale
by DWJL511 Sat 6 May 2017 - 12:34

» WTS: Scale Pro-Line Jeep Unlimited Painted Body (Olive Green)
by DWJL511 Sat 6 May 2017 - 12:32

» [PHOTOS] 20170427 Night drifting at Buangkok Sports Park
by boolean21 Fri 28 Apr 2017 - 22:41

» [Night Drifting] 27 Apr 2017 2030hrs - Buangkok Sports Park near Blk 986A - MSCP at Blk 984
by boolean21 Tue 25 Apr 2017 - 21:54

» WTS Axial SCX10 RTR Jeep wrangler Rubicon sold!
by Clkken Tue 25 Apr 2017 - 0:24

» [Offroad Trails] Offroading at Tampines Quarry 23 Apr 2017 - 0900hrs
by boolean21 Sat 22 Apr 2017 - 16:25

» [PHOTOS] 20170416 Punggol East Hardcourt on road RC
by boolean21 Sun 16 Apr 2017 - 12:59

June 2017
MonTueWedThuFriSatSun
   1234
567891011
12131415161718
19202122232425
2627282930  

Calendar Calendar

Affiliates
free forum

Free Domain Name
Google+

Tamiya TEU-104BK modification for 2S LiPo cut-off

View previous topic View next topic Go down

Tamiya TEU-104BK modification for 2S LiPo cut-off

Post by laneboysrc on Sat 24 Aug 2013 - 22:05

Hi everyone! geek

Many Tamiya kits available on sale today still come with the TEU-104BK ESC. This ESC is perfectly fine for running brushed motors, but does not contain a BEC and its low voltage cut-off is too low for LiPo batteries.



The missing BEC is easily dealt with: either use "high voltage" compatible servo and receiver, or a cheap external BEC.

Fortunately it is also easy to modify the ESC to have a LiPo compatible voltage cut-off -- assuming you are able to solder a tiny surface-mount resistor.

By default the voltage cut-off is set to 4.5V. We measured this by connecting the ESC to a lab-power-supply, slowly lowering the voltage until the ESC cut off and started to flash the LED.

For a 2S LiPo 4.5V is way below the voltage that damages the battery, we rather need a cut-off at 6V or slightly higher.



The ESC implements the voltage cut-off through its microcontroller. A resistor divider comprising of R1 and R2 on the PCB divide the battery voltage down to a level that can be measured by the microcontroller. R2 is 10 KOhm, and R1 is 27 KOhm. By lowering the resistor value of R2 we can increase the threshold for cut-off from 4.5V to 6.2V. We can lower the resistor by adding a 20 KOhm resistor in parallel to R2. This way we don't have to remove components from the ESC.



The components used in the ESC are tiny 0402 SMD parts. But due to the way the board is layout it is possible to use a larger 0805 SMD 20 KOhm resistor, which is easier to handle by humans.



We laid the 20 kOhm resistor onto R2 and soldered it to the bottom pad. The other side of the resistor we soldered on the bottom pad of R1, which is directly connecting to R2.

Depending on your soldering skills it does not take more than 10 minutes to modify the ESC. With the modification the ESC shuts off at just the right time when your LiPo batteries deplete.

For those in Singapore who'd like to have their ESC modified, don't hesitate to PM me! geek
avatar
laneboysrc
Crawler

Posts : 872
Join date : 2012-05-21

View user profile http://laneboysrc.blogspot.com

Back to top Go down

Re: Tamiya TEU-104BK modification for 2S LiPo cut-off

Post by Marpek on Sat 24 Aug 2013 - 22:10

You rocks mate!Very Happy 
avatar
Marpek
Crawler

Posts : 1666
Join date : 2011-08-22

View user profile

Back to top Go down

Re: Tamiya TEU-104BK modification for 2S LiPo cut-off

Post by Liew on Sun 25 Aug 2013 - 20:18

Good job Very Happy
avatar
Liew
Crawler

Posts : 580
Join date : 2011-08-23

View user profile

Back to top Go down

Re: Tamiya TEU-104BK modification for 2S LiPo cut-off

Post by boolean21 on Mon 26 Aug 2013 - 11:19

solid soldering skills and eyesight!!

my eyes will go "pa jiao" if i stare at the smd resistors too long... Very Happy

good work bro!!

_________________
My Blogs: MyHoncho Blog | Boolean21 RC Blog
Youtube: SGCrawlers RC Channel | BooleanRC Video Channel
Facebook: SGCrawlers FB Page  | Boolean21 FB Page
Instagram: http://instagram.com/SGCrawlers
Twitter: http://twitter.com/SGCrawlers
avatar
boolean21
Crawler

Posts : 5002
Join date : 2011-08-18
Location : Deep inside the Jungle

View user profile Http://youtube.com/MyHonchoSG

Back to top Go down

Re: Tamiya TEU-104BK modification for 2S LiPo cut-off

Post by laneboysrc on Mon 26 Aug 2013 - 22:30

Thanks guys!

boolean21 wrote:my eyes will go "pa jiao" if i stare at the smd resistors too long... Very Happy
My eyes are also quite bad already, but with a 5x magnifier lamp it is no issue working on those small parts What a Face  
avatar
laneboysrc
Crawler

Posts : 872
Join date : 2012-05-21

View user profile http://laneboysrc.blogspot.com

Back to top Go down

Re: Tamiya TEU-104BK modification for 2S LiPo cut-off

Post by Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum