28830 Parallax Inc, 28830 Datasheet

Interface Modules & Development Tools Propeller Servo Controller

28830

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

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
Propeller Servo Controller USB (#28830)
The Propeller Servo Controller USB allows you to control up to 16 servos by sending serial commands
from a microcontroller or PC via serial or USB connection. 32 servos can be controlled when using two
Propeller Servo Controllers with a microcontroller. Since the Propeller Servo Controller USB is powered by
a Propeller chip and the firmware is open-source, the Propeller Servo Controller USB is also a
development platform which can be customized for specific applications. This could include systems that
require servos, DC motors, stepper motors and lighting control.
Features
Application Ideas
Key Specifications
Before Connecting Your Propeller Servo Controller USB
Copyright © Parallax Inc.
Propeller chip based hardware
Compatible with previous Parallax servo controllers
Separate screw-terminal power supply and power
switch for servos
Open-source firmware
Program via USB interface with PC or serial interface
to microcontroller
Servo Ramping
Network Ready – two units may be linked to control
32 servos (via microcontroller only)
Fun-house prop control
Animated art control
Robotics
Power requirements: 5 VDC @ ~60 mA for logic, 4.8 – 7.5 VDC for servos (do not exceed your
servos’ input voltage rating)
Communication: Asynchronous Serial @ 2400 bps or 38.4 kbps (TTL or USB)
Operating temperature: 32 to 158 °F (0 to 70 °C)
Dimensions: 2.26 x 1.80 x 0.65 in (57.3 x 45.7 x 16.5 mm)
Programming the Propeller Servo Controller USB (PSCU) requires regulated 5 VDC. This can
come from the USB port when used; (USB A to Mini B cable (#805-00006) required, sold
separately). Or, supply 5 VDC to the center terminal on the Serial In header.
Servos require a separate power supply connected to the screw terminal. Typically this needs to
be from 4.8 – 7.5 VDC, and capable of supplying adequate current for the servos you are
connecting. Consult your servos’ documentation for voltage limits and current
requirements. Do not exceed 7.5 VDC input.
Propeller Servo Controller USB (#28830)
Web Site: www.parallax.com
Forums: forums.parallax.com
Sales: sales@parallax.com
Technical: support@parallax.com
v1.0 8/24/2009 Page 1 of 12
Office: (916) 624-8333
Fax: (916) 624-8003
Sales: (888) 512-1024
Tech Support: (888) 997-8267

Related parts for 28830

28830 Summary of contents

Page 1

... Consult your servos’ documentation for voltage limits and current requirements. Do not exceed 7.5 VDC input. Copyright © Parallax Inc. Web Site: www.parallax.com Forums: forums.parallax.com Sales: sales@parallax.com Technical: support@parallax.com Propeller Servo Controller USB (#28830) Office: (916) 624-8333 Fax: (916) 624-8003 Sales: (888) 512-1024 Tech Support: (888) 997-8267 v1.0 8/24/2009 Page ...

Page 2

... The PSCU is shown here connected to a USB cable, two servos, one connected to channel 0 and the other connected to channel 14 and a 7.2V R/C battery back. The 7.2V R/C battery pack provides power for the servos. Propeller Servo Controller USB (#28830) Note: you may v1.0 8/24/2009 Page ...

Page 3

... 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. Copyright © Parallax Inc. Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 4

... Similarly, if your servo strains when the pulse width is set to 1250 you should reduce this value as needed to prevent the servo from straining. Copyright © Parallax Inc. Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 5

... PSCU. Copyright © Parallax Inc. ' Serial Data I/O pin ' Constant for 2400 baud ' temporary variable ' Find and get the version ' number of the PSC. ' Serial Data I/O pin ' Constant for 2400 baud ' temporary variable Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 6

... Within the WRservo subroutine the new pw is sent and the position is polled five times, once per second. A DEBUG command is used to format the reply and print window for you to view. Copyright © Parallax Inc. Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 7

... Servo Enable command (below) this channel will no longer refresh even if the PSCU is reset or power is cycled. Copyright © Parallax Inc. ' Serial Data I/O Pin ' Constant For 2400 Baud ' Temporary Variable (Array) ' Serial Data I/O Pin ' Constant For 2400 Baud Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 8

... Note: The PSCU must be reset after this command is sent or power must be cycled to activate the change. Copyright © Parallax Inc. ' Serial Data I/O Pin ' Constant For 2400 Baud ' Serial Data I/O Pin ' Constant For 2400 Baud ' Temporary Variable (Array) Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 9

... CR STOP Copyright © Parallax Inc. ' Channel ' Pulse Width Value ' Serial Data I/O Pin ' Constant For 2400 Baud ' Serial Data I/O Pin ' Constant For 2400 Baud ' Temporary Variable (Array) Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 10

... Note: Networking/Daisy-chaining of PSCU modules is not supported when using a USB connection. For USB control you will need a separate USB port for each unit and all units will be set to Port Mode 0. Copyright © Parallax Inc. Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 11

... Propeller, thereby disabling the Propeller chip from being programmed or identified. You can still communicate serially whether the jumper is installed or not. Jumper Installed Module Dimensions Copyright © Parallax Inc. Jumper Not Installed Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

Page 12

... Parallax customers and employees. You can often find fast answers to questions by searching previous posts or posting your question to the appropriate forum. Propeller Servo Controller USB Schematic Schematic PDF is available for download from the 28830 product page at www.parallax.com. Copyright © Parallax Inc. Propeller Servo Controller USB (#28830) v1.0 8/24/2009 Page ...

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