Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Problem in connecting LEDs in series and parallel

Status
Not open for further replies.
Ramesh_maharjan

Ramesh_maharjan

Member level 2
Member level 2
Joined
May 19, 2006
Messages
50
Helped
7
Reputation
14
Reaction score
0
Trophy points
1,286
Activity points
1,553
I having problem in connecting the leds in series and parallel. I have used the same kind of LEDS(one color from same manufacturer) and calculated the resistor value but in practical but it got wrong.
The main problem is each LEDs glowed with different brightness. How can I make it glow with common birghtness. I have found that the LEDs form same manufacutrer can differ from one another and can draw variable current for the same bightness. What should I do it to reduce this problem
 

Try to increase current flowing through diodes to, say, >10mA ..
Above certain current levels the difference in the brightness should become almost invisable ..
Here you will find more explenations:
**broken link removed**

Regards,
IanP
 
in general,the brightness of the LED is decide on manufacturer
the brightness and the resistor value will have different form same manufacutrer
When the resistor value are different,the current of the LED will are different in parallel,it will make the brightness are different.(because LED is current drive device)
so suggest using series method

typical the LED's current is 15mA
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top