Did that.  You still see a red side and a green side.

Good idea, though.

Andy









Dan Michaels <oricom@LYNX.SNI.NET> on 06/26/2000 01:59:44 PM

Please respond to pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>








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 cc:      (bcc: Andrew Kunz/TDI_NOTES)



 Subject: [OT]: 3 colors from an LED








Andy wrote:
>I need to generate Red, Amber-ish, and Green from a single LED body (standard
>T1.75 size).
>
>I am limited to a common-cathode device with two anodes to select the desired
>color.
>
>The P391 from Digi-Key doesn't blend the colors well when both LEDs are turned
>on, it's obviously a red and a green LED in the same package.
>

Try pulsing red and green on opposite phase, with various duty cycles
for different amber hues. To trick the eye, ie, to get persistence of
vision, use pulserate >> 25 hz.