At 04:04 PM 5/14/97 -0500, you wrote:
>-- [ From: Kevin Sutter * EMC.Ver #2.5.02 ] --
>
>I'm building a new RC plane that requires mixing both elevator and rudder
>channels for a V-tail configuration. I'd like to do away with the mechanical
>version and instead use a 16c84. Does any one have any code (or info) that
>will accept two channels of input from an RC receiver and output a signal
>directly to two servos?

Kevin,

I have a mixer based on a 12C508 with fixed mixing ratios.  I'd be happy to
burn you one if you want just tell me the mix you want.  I'll send you a
simple schematic for it, too.

It would be easiest if you give me a formula to implement the mix.  The
thing is written in assembly, but I use C to generate the code for the
mixing function.

It takes two inputs ranging from 0 to 208, producing two independent
outputs ranging from 0 to 208, with neutral at 104.  0 ==> 980uS, 104 ==>
1500uS pulse, 208 ==> 2080uS.  This implies 5uS resolution, with a 980uS
threshold.

I will work on a generic mixer with adjustable slopes shortly.

Andy

==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
          Hardware & Software for Industry & R/C Hobbies
        "Go fast, turn right, and keep the wet side down!"
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