Great semi obscure topic here guys. I found this thread while searching (banging my head on the table) for a solution to my problem.
I have a Mini SSCII Servo controller board from Seetron. I was unable to get my arduino to send the SIMPLE 3 bytes required to move servo position. It was really driving me nuts because I knew all my wiring and code were perfect.
All it took for me to make it work (after reading this thread) was a single SN74LS04N Hex Inverter I had in my parts box for years.
I wired the Software Serial TX Pin on my arduino to an input of the hex inverter... took the output of the hex inverter and connected it to the serial input of the Mini SSCII. Whalla it works 100%
I love these forums. There is just so much valuable information here. I hope this place stays around forever. ;D
Phil