28830 Parallax Inc, 28830 Datasheet - Page 3

• Manufacturer Part Number: 28830
• Description: Interface Modules & Development Tools Propeller Servo Controller
• Manufacturer: Parallax Inc

Specifications of 28830

• Interface Type: USB, Serial
• Data Bus Width: 8 bit
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TTL Serial Connection
If you wish to control your PSCU from a microcontroller then you will need to obtain a regulated 5 V from
the host microcontroller, development board, or you may use a separate regulated 5 V power supply with
a common ground. You also need to provide a TTL compatible serial signal to the PSCU. Ground, power
and serial signal connections are made to the “Serial In” header as shown below. This 6-pin (2 x 3)
header is actually two serial ports, one for incoming data and the other for outgoing data to another
PSCU for networking. Notice that the connected cable is attached to the upper three pins with the black
(ground) lead toward the outside. This upper port is the incoming serial connection. The lower three
pins are used to connect to an additional PSCU for more channels.
You can test your PSCU using a BASIC Stamp 2, Board of Education and the code examples provided in
the Command Set section of this documentation. Example programs for the BASIC Stamp demonstrate
the use of each the commands and display responses for those commands which generate a reply.
Copyright © Parallax Inc.
The PSCU is shown here connected to a Board of Education, two servos, one
connected to channel 0 and the other connected to channel 14 and a 7.2 V R/C
battery back. The 7.2 V R/C battery pack provides power for the servos.
Propeller Servo Controller USB (#28830)
v1.0 8/24/2009 Page 3 of 12