You located the problem Henrik! Unless I missed it, I didn't see where the datasheet indicates you must send an extra bit before sending data. I'm guessing this is something I just should have known? Maybe I'm just not understanding it, I don't know.

Anyhow, it seems to work well, I like it. I know there's a different way to do it but I've tried a few different things and I can't get it to work like I want it. I'll be using this in the "off" position or on with a continually adjusting voltage.

If I need it off, I can just send this command: SHIFTOUT sdi,clk, 1, [%00110000001101100\16]

When I send a specific voltage, I would send the above command with the SHDN bit set to zero. Now, when I want to change just the 10 bit number, how can I do it? The first five bits will have two numbers for my application, which are %00110 or %00111. Obviously the 10 bit number changes but isn't it possible to send something like SHIFTOUT sdi,clk, 1, [SET, VOLTAGE] where "set" is %00111 and "voltage" is %000001101100.