User Manual

Diagram for connecting an LED to

the Micro Maestro servo controller.

Diagram showing how to connect the

Micro Maestro servo controller to a

microcontroller.

To connect an LED to the Maestro, you should first decide

which channel you would like to use. In the Maestro Control

Center, under the Channel Settings tab, change that channel

to Output mode and click “Apply Settings”. Next, connect the

cathode of the LED to GND (any ground pad on the Maestro

will suffice because they are all connected). Then connect

the anode of the LED to the channel’s signal line (through a

resistor is needed). The signal line has a 220 ohm resistor for

protection, which means you can connect most LEDs directly

to the signal line. However, you should read your LED’s

datasheet to make sure, and add your own resistor if needed.

You can test your LED by setting the “target” of the LED channel in the Status tab of the Maestro

Control Center. The LED should be on if you set the target to be greater than or equal to 1500 μs and

off otherwise. You can control the LED in your script using the SERVO command or over serial using

the “Set Target” command. These commands take arguments in units of quarter-microseconds, so the

LED should be on if you send a number greater than or equal to 6000 and off otherwise.

The total current you can safely draw from the signal lines is limited. See Section 1.a

and Section 1.b for more information.

7.c. Connecting to a Microcontroller

The Maestro can accept TTL serial commands from a

microcontroller. To connect the microcontroller to the

Maestro, you should first connect the ground line of the

microcontroller to the ground line of the Maestro. Then

connect the TX (serial transmit) line of the

microcontroller to the RX line of the Maestro so that the

microcontroller can send commands. If you need to

receive serial responses from the Maestro, then you will

need to connect the RX (serial receive) line of the

microcontroller to the Maestro’s TX line. For more

information on the different serial modes and

commands, see Section 5.

If you want your microcontroller to have the ability to reset the Maestro, then connect the RST line

of the Maestro to any general-purpose I/O line of the microcontroller. You should have the I/O line

tri-stated or at 5 V when you want the Maestro to run and drive it low (0 V) temporarily to reset the

7. Wiring Examples Page 92 of 99