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 3 users online :: 0 Registered, 0 Hidden and 3 Guests

None

[ View the whole list ]


Most users ever online was 57 on Fri 23 Sep 2016 - 12:58
Latest topics
» shop that sell crawler stuff
by ongbenghui Today at 12:08

» Traxxas Revo 3.3
by Maska Yesterday at 11:36

» Coldman28's 1/6 Willys Jeep
by boolean21 Tue 29 Nov 2016 - 8:31

» [Night Drifting] 01 Dec 2016 2030hrs - Buangkok Sports Park near Blk 986A - MSCP at Blk 984
by boolean21 Mon 28 Nov 2016 - 20:37

» Rp-05 Rc Car Review: $130 1/16 Erevo Clone (Gearbest)
by Rc Reviewer Thu 24 Nov 2016 - 6:24

» Can a newbee join in in.
by boolean21 Wed 23 Nov 2016 - 22:18

» [Scale Trail & Rally] Woodgrove Ave - Sunday 20 Nov 2016 0900hrs
by boolean21 Sat 19 Nov 2016 - 7:38

» [Night Drifting] 17 Nov 2016 2030hrs - Buangkok Sports Park near Blk 986A - MSCP at Blk 984
by boolean21 Wed 16 Nov 2016 - 22:55

» WTB trail truck.
by Crawlerss Wed 9 Nov 2016 - 22:29

» [VIDEO] Scale RC Trucks Offroad Adventures Toyota Hilux Land Rover Defender Jeep Wrangler RC4WD
by boolean21 Tue 8 Nov 2016 - 22:43

» SCX10 or SCX10 II
by dididaddy Tue 8 Nov 2016 - 14:55

» Wts Axial Yeti and Wraith Alloy Upagrade Parts
by barstardrider Sat 5 Nov 2016 - 11:14

» [Offroad Trails] RC 4x4 Trails at Tampines Quarry 06 Nov 2016 - 0900hrs
by boolean21 Sat 5 Nov 2016 - 9:10

» [Night Drifting] 03 Nov 2016 2030hrs - Buangkok Sports Park near Blk 986A - MSCP at Blk 984
by boolean21 Tue 1 Nov 2016 - 22:05

» JoMac Comando Mach 3 transmitter from 1982
by laneboysrc Sun 30 Oct 2016 - 13:23

» [Offroad Bashing and Rally] Offroad Bashing and Rally at Tampines Track 23 Oct 2016 - 0900hrs
by boolean21 Sat 22 Oct 2016 - 10:09

» Boolean21's StreetJam OTA-R31 RC Drift Car
by boolean21 Wed 19 Oct 2016 - 22:47

» [Night Drifting] 20 Oct 2016 2030hrs - Buangkok Sports Park near Blk 986A - MSCP at Blk 984
by boolean21 Tue 18 Oct 2016 - 23:48

» my lr3 shell - teck's Land Rover Discovery 3
by Fantom Mon 17 Oct 2016 - 23:26

» [Scale Trail] Woodgrove Ave - Sunday 16 Oct 2016 0900hrs
by boolean21 Sat 15 Oct 2016 - 9:42

December 2016
MonTueWedThuFriSatSun
   1234
567891011
12131415161718
19202122232425
262728293031 

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

laneboysrc
Crawler

Posts : 865
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 

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

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

boolean21
Crawler

Posts : 4964
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  

laneboysrc
Crawler

Posts : 865
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 Today at 22:04


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