front panel LED help sought

Doug Jackson doug at
Wed Jan 14 17:41:50 CST 2015

One thing to be careful about is that modern LEDs are *much* more 
effecient than old LEDs.

I recently replaced a LED on my IMSAI front panel.  The new LED stuck 
out like a sore thumb, it was insanely bright.

 From memory, I replaced the resistor with about a 1k2.


On 15/01/2015 10:24 AM, jwsmobile wrote:
> Jay,
> there are no issues with the LED's that I know of other than they do 
> have a load resistor in series with them, so they need no internal 
> dropping resistor to work across +5.
> they have long leads as well, as there is a 1" (or there bouts) 
> stiffening board to keep the leads from shorting out, and to position 
> them in a line to poke thru the front panel.  There are other 
> solutions to allow for long leads, but they just used a long circuit 
> board.
> Jim
> On 1/14/2015 2:03 PM, Jay West wrote:
>> Tony wrote...
>> Or, if you can find even one working LED on the original panel, 
>> remove it
>> and connected {snip}
>> That is probably the way I'll go. Thanks (as always) Tony!!!
>> J

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