ASTi AI-Delta Technical User Manual - Page 13

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AI-Delta Technical User Guide (Rev. A, Ver. 0)

4.0 Control inputs and digital outputs

The AI-Delta's two USB connectors and DB-15 connectors also function as control inputs. The

following sections describe the AI-Delta's control inputs and digital outputs, explaining how to

use the control input as a digital input or analog output.

4.1 Control inputs

The control inputs are contact-sensing; no voltage is required. Simply connect the control input

and control input ground lines together using a switch or other suitable device, such as a press-

to-talk (PTT) device. The control input can logically function as either a digital or analog input.

Figure 6: Control input circuitry

4.1.1 Control input as digital input

To use the control input as a digital input, simply short or open the required pins. For example, if

you short Pins 9 and 10, Control Input 1 is True. If the pins are open, Control Input 1 is False. In

this example, the control input acts like an on and off switch.

Figure 7: Digital In