I'm confused about what exactly TTL means. I have a Hagisonic AniBat UltraSonic Sensor HG-M40DAI which returns a positive TTL signal indicating that a ping has been received. It causes a ping to be transmitted by sending a signal on one wire and waits for the response on another wire.
My confusion lies in the fact that whenever I search for TTL, I seem to get items about TTL and RS-232.
So can I just use two of the Ardino's pins to communicate with the sensor?
The datasheet for the sensor is at:http://www.robotshop.us/content/PDF/hagisonic-anibat-data-sheet.pdf