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Описание

Описание

The Mini Maestros are the newest of Pololu’s second-generation USB servo controllers, offering more channels and features than the smaller six-channel Micro Maestro. The Mini Maestros are available in three sizes:

• Mini Maestro 12
• Mini Maestro 18
• Mini Maestro 24

The Mini Maestros are highly versatile (and compact) servo controllers and general-purpose I/O boards. They support three control methods: USB for direct connection to a computer, TTL serial for use with embedded systems, and internal scripting for self-contained, host controller-free applications. The channels can be configured as servo outputs for use with radio control (RC) servos or electronic speed controls (ESCs), as digital outputs, or as analog/digital inputs. The extremely precise, high-resolution servo pulses have a jitter of less than 200 ns, making these servo controllers well suited for high-performance applications such as robotics and animatronics, and built-in speed and acceleration control for each channel make it easy to achieve smooth, seamless movements without requiring the control source to constantly compute and stream intermediate position updates to the Mini Maestros. The Mini Maestros also feature configurable pulse rates from 1 to 333 Hz and can generate a wide range of pulses, allowing maximum responsiveness and range from modern servos. Units can be daisy-chained with additional Pololu servo and motor controllers on a single serial line.  

 Bottom view with dimensions (in inches) of Pololu Micro and Mini Maestro servo controllers.

A free configuration and control program is available for Windows and Linux, making it simple to configure and test the device over USB, create sequences of servo movements for animatronics or walking robots, and write, step through, and run scripts stored in the servo controller. The Mini Maestros’ 8 KB of internal script memory allows storage of up to approximately 3000 servo positions that can be automatically played back without any computer or external microcontroller connected.

Because the Mini Maestros’ channels can also be used as general-purpose digital outputs and analog or digital inputs, they provide an easy way to read sensors and control peripherals directly from a PC over USB, and these channels can be used with the scripting system to enable creation of self-contained animatronic displays that respond to external stimuli and trigger additional events beyond just moving servos.

The fully assembled versions of the Mini Maestro ship with 0.1" male header pins installed as shown in the respective product pictures. The partial kit versions ship with these header pins included but unsoldered, which allows the use of different gender connectors or wires to be soldered directly to the pads for lighter, more compact installations. A USB A to mini-B cable (not included) is required to connect this device to a computer.

Main Features 

• Three control methods: USB, TTL (5V) serial, and internal scripting
• 0.25μs output pulse width resolution (corresponds to approximately 0.025° for a typical servo, which is beyond what the servo could resolve)
• Pulse rate configurable from 33 to 100 Hz**
• Wide pulse range of 64 to 3280 μs**
• Individual speed and acceleration control for each channel
• Alternate channel functions allow the channels to be used as:
  • General-purpose digital outputs (0 or 5 V)
  • Analog or digital inputs (channels 0 – 11 can be analog inputs; channels 12+ can be digital inputs)
  • One channel can be a PWM output with frequency from 2.93 kHz to 12 MHz and up to 10 bits of resolution
• A simple scripting language lets you program the controller to perform complex actions even after its USB and serial connections are removed
• Free configuration and control application for Windows makes it easy to: 

  

  • Configure and test your controller
  • Create, run, and save sequences of servo movements for animatronics and walking robots
  • Write, step through, and run scripts stored in the servo controller
• Two ways to write software to control the Maestro from a PC:

  

  • Virtual COM port makes it easy to send serial commands from any development environment that supports serial communication
  • Pololu USB Software Development Kit (listed under the resources tab) allows use of more advanced native USB commands and includes example code in C#
• TTL serial features: 
  • Supports 300 – 200000 bps in fixed-baud mode, 300 – 115200 bps in autodetect-baud mode*
  • Simultaneously supports the Pololu protocol, which gives access to advanced functionality, and the simpler Scott Edwards MiniSSC II protocol (there is no need to configure the device for a particular protocol mode)
  • Can be daisy-chained with other Pololu servo and motor controllers using a single serial transmit line
  • Chain input allows reception of data from multiple Mini Maestros using a single serial receive line without extra components (does not apply to Micro Maestros)
  • Can function as a general-purpose USB-to-TTL serial adapter for projects controlled from a PC
• Board can be powered off of USB or a 5 – 16 V battery, and it makes the regulated 5V available to the user
• Compact size of 0.85"×1.20" (2.16×3.05 cm) and light weight of 0.17 oz (4.8 g) with headers
• Upgradable firmware 

Maestro Comparison Table

	Micro Maestro	Mini Maestro 12	Mini Maestro 18	Mini Maestro 24
Channels:	6	12	18	24
Analog input channels:	6	12	12	12
Digital input channels:	0	0	6	12
Width:	2.16 cm	2.79 cm	2.79 cm	2.79 cm
Lenght:	3.05 cm	3.61 cm	4.57 cm	5.84 cm
Weight*:	3.0 g	4.2 g	4.9 g	6.0 g
Configurable pulse rate**:	33–100 Hz	1–333 Hz	1–333 Hz	1–333 Hz
Pulse range**:	64–3280 μs	64–4080 μs	64–4080 μs	64–4080 μs
Script size***:	1 KB	8 KB	8 KB	8 KB

*     This is the weight of the board without header pins or terminal blocks.
**   The available pulse rate and range depend on each other and factors such as baud rate and number of channels used. See the Maestro User’s Guide for details.
*** The user script system is more powerful on the Mini Maestro than on the Micro Maestro. See See the Maestro User’s Guide for details. 

Application Examples 

• Serial servo controller for multi-servo projects (e.g. robot arms, animatronics, fun-house displays) based on microcontroller boards such as the BASIC Stamp, Orangutan robot controllers, or Arduino platforms
• PC-based servo control over USB por
• PC interface for sensors and other electronics: 
  • Read a gyro or accelerometer from a PC for novel user interfaces
  • Control a string of ShiftBrites from a PC for mood lighting
• General I/O expansion for microcontroller projects
• Programmable, self-contained Halloween or Christmas display controller that responds to sensors
• Self-contained servo tester               

An example setup using a Micro Maestro to control a ShiftBar and Satellite LED Module is shown in the picture below and one of the videos above. Maestro source code to control a ShiftBar or ShiftBrite is available in the Example scripts section of the Maestro User’s guide.

Connecting the Micro Maestro to a chain of ShiftBars. A single 12V supply powers all of the devices.

FAQ`s

FAQ`s

Ресурсы

Ресурсы

Documentation and other information
Pololu Maestro Servo Controller User’s Guide (Printable PDF: maestro.pdf) 
User's guide for the Pololu Micro Maestro 6-channel USB Servo Controller and the Pololu Mini Maestro 12-, 18-, and 24-Channel USB Servo Controllers.

Pololu USB Software Development Kit
The Pololu USB SDK contains the code you need for making your own applications that use native USB to control the USB AVR Programmer, Jrk Motor Controller, or the Maestro Servo Controller. 

Sample Project: Simple Hexapod Walker (Printable PDF: maestro_hexapod.pdf) 
This is a step-by-step tutorial showing you how to use the Pololu Micro Maestro to build a simple six-legged walking robot. 

File downloads
Maestro Servo Controller Windows Drivers and Software (release 100506) (5789k zip) 
This ZIP archive contains the installation files for the Maestro Control Center, the Maestro command-line utility (UscCmd), and the Maestro drivers for Microsoft Windows. 

Maestro Servo Controller Linux Software (release 100505) (112k gz)
This tar/gzip archive contains the binary executable files for the Maestro Control Center and the Maestro command-line utility (UscCmd) for Linux. 

Firmware version 1.01 for the Micro Maestro 6-Servo (usc02a) (35k pgm) 
Use this file with the Maestro Control Center to upgrade your Micro Maestro’s firmware. This update contains a bug fix that will make “Ignore” mode work for servo channels. The update is recommended for devices with an earlier firmware version number, including all devices shipped before November 19, 2009.

Recommended links
Maestro Support for RoboRealm
The Pololu Maestro RoboRealm module provides a way to interface the visual processing of RoboRealm into servo movements using the Pololu Maestro USB Servo Controller. Released February, 2010.

Paparazzi Autopilot for Linux
Patrick Hickey and Bradley Lord use a Pololu Micro Maestro for servo output and a Pololu 4 servo multiplexer to support manual control override in their model aircraft autopilot project. Published February, 2010.
 

Галерея

Галерея

Creating a sequence of servo movements using the Maestro Control Center.	The Status tab in the Maestro Control Center.	The PWM Output control in the Status tab in the Maestro Control Center (only available on the Mini Maestro 12, 18, and 24).
The Errors tab in the Maestro Control Center.	The Channel Settings tab in the Maestro Control Center.	The Serial Settings tab in the Maestro Control Center.
The Sequence tab in the Maestro Control Center.	The Script tab in the Maestro Control Center.