LED/RESISTOR COMBO for AudioSector LM4780

thunk303 · 4th November 2011, 08:35 AM

I simple question to Peter if he has time or anybody who may have experience with this kit.

The LED's are just for status display and so don't need to light up much, I would prefer to use the lower output units if possible.

I have these 2 LED's on hand but have no idea what value resistor to use with it. I have 10/20/30/40/50/60/70/80/90/100k RN55D resistors on hand.

LED-1
AVAGO TECHNOLOGIES|HLMP-KA45-E0000|LED, 3MM, INGAN, BLUE | element14 Australia

or

LED-2
VCC (VISUAL COMMUNICATIONS COMPANY)|VAOL-3GSBY4|LED, 3MM, BLUE, 2500MCD, 470NM | element14 Australia

Cheers all.
Getting close now
Dean

woody · 4th November 2011, 09:01 AM

If you are conecting it to about 30v using a RN55D size resistor you can use anything
from about 4k up. Using a 4k resistor would be kind of bright a 100k resistor would be sort of dim. If you just want a rather dim light I would be tempted to start with a 40K
resistor and go from there.

thunk303 · 4th November 2011, 09:11 AM

Cheers Woody. Sounds like I have a pretty wide margin of error so will try the 40k as you suggested.

Thanks for your time.

Dean

4th November 2011, 08:35 AM	#1
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	LED/RESISTOR COMBO for AudioSector LM4780 I simple question to Peter if he has time or anybody who may have experience with this kit. The LED's are just for status display and so don't need to light up much, I would prefer to use the lower output units if possible. I have these 2 LED's on hand but have no idea what value resistor to use with it. I have 10/20/30/40/50/60/70/80/90/100k RN55D resistors on hand. LED-1 AVAGO TECHNOLOGIES\|HLMP-KA45-E0000\|LED, 3MM, INGAN, BLUE \| element14 Australia or LED-2 VCC (VISUAL COMMUNICATIONS COMPANY)\|VAOL-3GSBY4\|LED, 3MM, BLUE, 2500MCD, 470NM \| element14 Australia Cheers all. Getting close now Dean

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Audiosector lm4780 dual mono grounding	mattjuk81	Audio Sector	23	25th March 2012 08:22 PM
resistor values for lifting ground AND LED	cbutterworth	Tubes / Valves	1	24th January 2007 11:46 PM
AudioSector LM4780 Dual-Mono - questions/build log	gongzero	Chip Amps	3	22nd October 2006 02:43 PM
lm4780 Dual mono kit from audiosector?	Nickzz	Chip Amps	2	10th March 2006 01:32 AM
LED current limit resistor value calculator	tomchaoda	Parts	0	21st September 2004 04:24 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

4th November 2011, 09:01 AM	#2
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	If you are conecting it to about 30v using a RN55D size resistor you can use anything from about 4k up. Using a 4k resistor would be kind of bright a 100k resistor would be sort of dim. If you just want a rather dim light I would be tempted to start with a 40K resistor and go from there.

4th November 2011, 09:11 AM	#3
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Cheers Woody. Sounds like I have a pretty wide margin of error so will try the 40k as you suggested. Thanks for your time. Dean

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)