[Premium-Rx] RA6790GM replacing LED bulbs above display windows
Mark S. Holden
mark at bmas.org
Tue Mar 1 10:18:09 EST 2005
Jim Garrison wrote:
>
> How easy?/How difficult?, and How cheap/How expensive?
>
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The earlier 6790/GM used small bulbs that are hard to find.
I adapted mine to use small rectangular green LED's.
I had to file them down a little so they'd fit around the clear plastic when it
was installed, and I hooked them up in strings of five in series with a dropping
resistor. (150 ohms?) They were aimed up/down/left/right to provide even
illumination. I glued them to the PC board.
Not an elegant solution, but it worked well.
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