Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Electronic Projects => Topic started by: EL34 on September 29, 2010, 12:21:37 pm
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I added a High output LED to my web store
http://www.hoffmanamps.com/MyStore/catalog/parts20.htm
Drive them somewhere around 3.6 volts at 20 to 30 milliamps
Here's a pic of one
Only 5mm in diameter and 14000 mcd
(http://www.hoffmanamps.com/MyStore/catalog/images/IMG_6130.jpg)
This is a pic of the LED being run at 25 milliamps on the bench
(http://www.hoffmanamps.com/MyStore/catalog/images/IMG_6126.jpg)
It blinded the camera
Note that I put 3 of these in series to test running them on 12 volts
Can't remember what current limit resistor I used, but they worked great and would not suck much current from a emergency battery.
This page will help you calculate the current limit resistor
there are two different calculators on this page
http://www.el34world.com/php/LedCurrent.htm