R/C Battery charger with capacity indicator

Status
Not open for further replies.
F

fjpompeo

Advanced Member level 1
Joined
Nov 29, 2003
Messages
415
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Location
Brazil
Activity points
3,044
I need a circuit of a R/C NiCd/NiMH pack battery charger with capacity indicator, I mean how much mAh the pack was charged. My packs are 7,2V x 2200mAh NiCd and 7,2V x 1800mAh NiMH used to power the servos of a helly.

Regards,

Fernando - call sign PU2PLL
 

Try these;

**broken link removed**
**broken link removed**
**broken link removed**

This one in japanese use bablefish to translate: http://www.picfun.com/appframe.html

**broken link removed**
 

Hello

You can calculate the capacitor value using this relation :

C = I / (6.28 x F x V)

Where I is the current needed to charge the battaries, F is the mains frequency, and finally V is the mains voltge 110 or 220.

A rule of thumb here is that the current needed to charge a battery is usually 1/10 of the battery capacity.

Sometimes a resistor is used in series with the capacitors, this resistor valus is better made equal to 1/10 of Xc of the capacitor.

Xc = 1 / (6.28 x F x C)

Regards
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…