RC India
Welcome Guest, please login or register.
 
Pages: [1] 2  All   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: December 02, 2009, 09:04:53 PM »
amir
Plane Lover
Senior Member

***

Reputation Power: 4 
amir has no influence.
Offline Offline

City: Lucknow
State: Uttar Pradesh
RC Skills: Expert
Posts: 247
Join Date: Mar, 2009

fbots:::The future of Robotics




hi
how to charge single celled lipos ?
will mobile charger work?
anyone have experience with it ?
Logged

Amir Shabeeh Ahmed
www.fbots.in
 

Read
« Reply #1 on: December 02, 2009, 09:22:17 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



the idea of charging using mobile charger was proposed by me lol
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #2 on: December 02, 2009, 09:23:37 PM »
amir
Plane Lover
Senior Member

***

Reputation Power: 4 
amir has no influence.
Offline Offline

City: Lucknow
State: Uttar Pradesh
RC Skills: Expert
Posts: 247
Join Date: Mar, 2009

fbots:::The future of Robotics



yaa..
but i was the first to post
 Wink Wink Wink Wink
Logged

Amir Shabeeh Ahmed
www.fbots.in
 

Read
« Reply #3 on: December 02, 2009, 09:57:36 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



well folks this topic was put up when we two were talking of 1 cell lipo as i asked him to buy for me

actually i have charged many types of batteries including ni-mh , ni-cd , li-ion [of mobiles] all barely- by just using that charger and they work fine

but i don't know the results of it on lipo
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #4 on: December 03, 2009, 01:00:56 PM »
RotorZone
Forum Administrator
Forum Hero

*****

Reputation Power: 8 
RotorZone has no influence.
Offline Offline

City: Bangalore
State: Karnataka
RC Skills: Advanced
Posts: 607
Join Date: Mar, 2009

RotorZone.com



The mobile chargers usually give out a little over 5V. The actual charger chip is inside your phone. So no, you cannot just plugin a LiPo.

Building a single cell LiPo charger is quite easy if you can do soldering. There are no balancing issues, so the circuit for a current and voltage limited charger is very simple and cheap.
Logged

 

Read
« Reply #5 on: December 03, 2009, 01:35:51 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Do you have any recommendations for such a circuit with parts that are easily available locally ?
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #6 on: December 03, 2009, 01:37:50 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



i cAN do soldering tell me the circuit
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #7 on: December 03, 2009, 04:11:19 PM »
RotorZone
Forum Administrator
Forum Hero

*****

Reputation Power: 8 
RotorZone has no influence.
Offline Offline

City: Bangalore
State: Karnataka
RC Skills: Advanced
Posts: 607
Join Date: Mar, 2009

RotorZone.com



See page 20 "current limited voltage regulator" and current limited 6V charger on page 22 of LM317 datasheet. Read this datasheet for the details of the regulator IC. You need to set the output voltage to 4.2V and current to 1C value of of your battery.

Adaptation of this circuit with component values for LiPo cells has been popularised by http://shdesigns.org/lionchg.html in RC world. You can pick up the circuit from here if you don't want to do the calculations yourself.

Since you are going to use a mobile charger with about 5V output, there is not enough headroom for dropout voltage of LM317. You could substitute LM2940 in place of LM317 for your application.
« Last Edit: December 03, 2009, 04:13:38 PM by RotorZone » Logged

 

Read
« Reply #8 on: December 03, 2009, 04:29:22 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



any thing simpler than it which requires less things-something simple availble?

and i have a charger that outputs 4.5v at 600mah
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #9 on: December 03, 2009, 04:30:24 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



is that charger ok?
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #10 on: December 03, 2009, 04:36:10 PM »
sushil_anand
Plane Lover
Forum Hero
*****

Reputation Power: 17 
sushil_anand has no influence.
Offline Offline

City: MUMBAI
State: Maharashtra
RC Skills: Intermediate
Posts: 1273
Join Date: Jul, 2009



Quote
is that charger ok?

No. You will need at least 6V at the rated current (1C) of your LiPo.
Logged

Hangar: Zlin 50L -120, CMPro Super Chipmunk, Ultimate Bipe EP, Imagine 50, Christen Eagle 160, Ultra Stick, Super Sports Senior
 

Read
« Reply #11 on: December 03, 2009, 04:51:58 PM »
RotorZone
Forum Administrator
Forum Hero

*****

Reputation Power: 8 
RotorZone has no influence.
Offline Offline

City: Bangalore
State: Karnataka
RC Skills: Advanced
Posts: 607
Join Date: Mar, 2009

RotorZone.com



Don't try experiments with LiPo, overcharging can result in fire.

It doesn't really get simpler than the first circuit http://shdesigns.org/pdf/lionchg.pdf. If that is challenging, you have to look at buying.
Logged

 

Read
« Reply #12 on: December 03, 2009, 09:40:15 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



can u tell me where to buy one?
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #13 on: December 04, 2009, 11:28:42 AM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



No. You will need at least 6V at the rated current (1C) of your LiPo.

Since the mah rating of the lipo was not mentioned, how was this calculation done ?
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #14 on: December 04, 2009, 04:23:19 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



http://www.funnhobby.com/showdetails.aspx?id=1152

is this charger ok
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #15 on: December 04, 2009, 04:34:41 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



The page does not display well, but it says the output is 8v or 12v.  So that would work for two cell or three cell lipos. 

You were after single cell chargers, right ?
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #16 on: December 04, 2009, 04:43:02 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



Quote
is that charger ok?

No. You will need at least 6V at the rated current (1C) of your LiPo.

ya i was over charging 1cell lipo only but read the post above to understand my intentions
« Last Edit: December 04, 2009, 04:48:22 PM by anwar » Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #17 on: December 04, 2009, 04:50:04 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



ya i was over charging 1cell lipo only but read the post above to understand my intentions

Which post ? Anyways, this does not look like a good match for one cell lipo charging.
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #18 on: December 04, 2009, 05:27:05 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



then tell other possibilities other than those given by rotorzone
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #19 on: December 04, 2009, 05:29:16 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Just curious, what are you guys planning to do with the one cell lipo ?  Almost all routine use of lipos in the RC world happens on two cell lipos or higher, so this is most interesting  Head Scratching
« Last Edit: December 04, 2009, 05:31:46 PM by anwar » Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #20 on: December 04, 2009, 05:36:59 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



TO BE USED ON SMALL PLANES WITH BRUSHED MOTORS THUS MAKING IT VERY CHEAP
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #21 on: December 04, 2009, 05:38:58 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



Well,Anwar bahiya i expected that u used small electric  helis which run on these batteries and thus should be able to answer this question
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #22 on: December 04, 2009, 05:48:46 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Hmmm..  they are borderline, more like toys  Wink

And they come with their own charger, did you lose yours ? Single cell chargers are harder to find, precisely for the reason I mentioned (they are not common in the RC world). 

For example, if you are willing to pay Rs550 for a charger, why not spend a little more, and get another toy heli or toy plane ?

Of course they are available...

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXWLT6 (expensive)
http://www.rcgroups.com/forums/showthread.php?t=1116487 (some cheap options)

If you absolutely do not want to build your own based on the plan Rajesh posted (which seems to be a widely used option), eBay sounds like your best route.
« Last Edit: December 04, 2009, 05:56:01 PM by anwar » Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #23 on: December 04, 2009, 06:22:56 PM »
ankur
Scratch builder and diy'er
Plane Lover
Forum Hero

*****

Reputation Power: 9 
ankur has no influence.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 750
Join Date: Aug, 2009

I am Gr8



Actually Amir bhaiya has order multiple lipos [single cell] for me-they are of two tpyes with different 'mah'
ask him the 'mah' of the batteries and tell us the charger for them[better if its is 1 or cheap two of them]
Logged

Ankur Singh,
Aged 14-Studing in Class 10th
 

Read
« Reply #24 on: December 04, 2009, 07:44:54 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Rajesh - What would be a best guess on the total cost of building that first circuit you posted using locally available components ?
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Pages: [1] 2  All   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Wanted Single cell LiPO battery
Wanted
sandeepm 0 1219 Last post November 29, 2011, 10:59:06 AM
by sandeepm
For sale NIB OS 46 AX, NIB 3 cell 3000 MAh lipo, NIB 3 Cell 2200 MAh lipo
For Sale
sravan 18 8316 Last post June 09, 2012, 01:15:56 PM
by sravan
Single cell 2200 mah lipo
Wanted
hangingtough 2 1340 Last post October 14, 2012, 10:27:23 AM
by hangingtough
Wanted Single Cell Lipo
Wanted
sandeepm 0 894 Last post October 27, 2012, 07:35:15 PM
by sandeepm
Need single cell for TX lipo 2650 mah and Turnigy brand
Wanted
atulrajguru9 5 1704 Last post November 14, 2013, 05:31:41 PM
by atulrajguru9