How can i connect Arduino Mega with SD84?
What is the connection scheme ?
Can i use a standard USB cable with B Plug to SD84 and the other side connect directly (without A Plug) to arduino pins: 5V, GND, TX and RX?
Can i use a USB To TTL Level Serial Converter like a Nokia CA-42 cable?
Hi,
The Devantech SD84 servo controller is USB only. Your best choice to get it to work with the Arduino MEGAwould be to use the USB host shield since there are no Tx / Rx pin on the SD84. There are no instructions specifically for mating those two products. The other option of course would be to choose a different servo controller with serial communication via pins.
Sincerely,
USB to serial cables require a USB host and thus would minimally require the USB host shield and properly code drivers. This controller already uses a serial interface and an FTDI USB-to-serial chip.
Your best bet would be to use a serial servo motor controller, or (more dangerously) tap directly into the serial lie traced on the Devantech SD84 servo controller by reverse engineering it and scratching the isolation coating on the proper traces. Needless to say, the latter would void warranty of the controller, may destroy it, and would look ugly.