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New products: G2 High-Power Motor Driver 18v25 and 24v21 (and price drops for other G2 drivers)
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Our second-generation family of high-power motor drivers continues to grow with the release of our G2 High-Power Motor Driver 18v25 and G2 High-Power Motor Driver 24v21, discrete MOSFET H-bridges that can supply a brushed DC motor with up to 25 A of continuous current at up to 30 V or up to 21 A of current at up to 40 V, respectively. In addition, we’ve lowered the prices of the 18v17 and 24v13 versions to make them even more affordable.
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The new G2 18v25 and G2 24v21 drivers’ double-sided design allows them to retain the same board dimensions as their 18v17 and 24v13 siblings, even though they can deliver significantly more power. The G2 drivers are half an inch shorter and can handle the same (or slightly more) current compared to the original 18v25 and 24v20 they are designed to replace, and they are less than half the size of the original 18v25 CS and 24v23 CS while offering basic current sensing functionality that can eliminate the need for a dedicated current sensor in some applications. As with previous G2 drivers, they also include reverse-voltage protection and a current limiting feature.
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Pololu G2 High-Power Motor Driver 24v21 next to original high-power motor driver 24v20 and 24v23 CS. |
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Pololu G2 High-Power Motor Driver 24v21 and 24v13. |
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For more information about the G2 motor drivers, see their product pages at the links below.
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New product: A-Star 32U4 Robot Controller SV with Raspberry Pi Bridge
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Our A-Star 32U4 Robot Controller SV with Raspberry Pi Bridge is now available, joining the LV version we released six months ago.
Similar to its lower-voltage sibling, the Robot Controller SV is a general-purpose robot controller that includes dual motor drivers and other useful peripherals like pushbuttons and a buzzer. It also has the same level shifters and power circuit that allow it to easily power and communicate with a Raspberry Pi when mounted as an auxiliary controller. Like our other A-Star controllers, the A-Star Robot Controller SV built around an ATmega32U4 microcontroller and ships preloaded with an Arduino-compatible USB bootloader.
This SV version of the A-Star Robot Controller uses an efficient step-down switching regulator, enabling it to operate (and optionally supply power to an attached Raspberry Pi) with input voltages from 5.5 V to 36 V. Compared to the LV version, the Robot Controller SV can also supply substantially more current across its wide operating voltage range:
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We’ve been working on some (long-awaited) I²C software to allow the A-Star to be used as a slave controller with a Raspberry Pi master, as well as an example project that shows how to build a robot with this setup. They’re nearly ready, so watch for them on the blog in the coming weeks. But don’t forget that the A-Star board can also be used by itself as a capable robot controller, as my recent sumo robot demonstrates.
To facilitate both of these uses, the A-Star 32U4 Robot Controller SV is available either assembled for use as a Raspberry Pi add-on or in a more barebones configuration that is suitable for customized assembly or standalone use. See those product pages and the user’s guide for more information about the robot controller.
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New products: MinIMU-9 and AltIMU-10 v5 IMU boards
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We have released new versions of our MinIMU-9 and AltIMU-10 inertial measurement unit (IMU) modules, which use an I²C interface to provide nine independent rotation, acceleration, and magnetic measurements that can be used to calculate the sensor’s absolute orientation (the AltIMU also includes an altimeter). These v5 editions feature ST’s new LIS3MDL 3-axis magnetometer and LSM6DS33 3-axis accelerometer and gyro, which allow them to offer improved performance over previous versions at lower prices. The new versions are pin-compatible with the previous ones, though software written for older IMU versions will need to be changed to work with the v5 since the sensor ICs have changed.
We think these new boards combine the best ST MEMS sensors into compact boards at great prices. However, our older MinIMU-9 v3, AltIMU-10 v3, and AltIMU-10 v4 are still available for now at reduced clearance prices, so if you don’t absolutely need ST’s newest sensors on your IMU, these previous versions are still very good sensor boards to consider.
Here’s an updated version of our diagram showing where the new v5 modules fit in:
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Evolution and release dates of Pololu carriers for ST’s MEMS sensors through January 2016. |
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New products: 12V 25D mm gearmotors with encoders
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All of our 25D mm metal gearmotors, including the newest versions with 12V motors, are now available with quadrature encoders. That’s 37 new products in all! With five different motor winding options and gear ratios available from 4.4:1 through 499:1, our total selection of 25D mm metal gearmotors has grown to nearly 100 options:
New products: LSM6DS33 accelerometer/gyro and LIS3MDL magnetometer carriers
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We’re getting 2016 started with the release of two new products: an LSM6DS33 3D accelerometer and gyro carrier and an LIS3MDL 3-axis magnetometer carrier.
As with other ST sensors, these chips can be configured and read through I²C or SPI interfaces, and our compact breakout boards incorporate voltage regulators and level shifters to make them easier to use with 5 V systems. Compared to the inertial and magnetic sensors we’ve used previously (most recently the LSM303D accelerometer and magnetometer and the L3GD20H gyro), these two new ICs offer different combinations of capabilities: the LSM6DS33 integrates an accelerometer and rate gyroscope into a single package, while the LIS3MDL is a standalone magnetometer.
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For more information about these boards, see their product pages at the links below.
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New products: Raspberry Pi Model A+ and Raspberry Pi 2 Model B
We now have three "Pi"s! …No, I’m not talking about our 3pi robot.
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In addition to the Raspberry Pi Model B+ we’ve been carrying, we now offer the smaller Raspberry Pi Model A+ and the more powerful Raspberry Pi 2 Model B as well. Check out their product pages for details about each version and how they compare to each other.
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Raspberry Pi Model B+. |
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As with the B+, the A+ and 2 B are compatible with our Raspberry Pi expansion boards, including our A-Star 32U4 Robot Controller with Raspberry Pi Bridge and our MC33926 and DRV8835 motor driver add-ons.
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Related products
New product: G2 High-Power Motor Driver 18v17
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The Pololu G2 High-Power Motor Driver 18v17 is now available, joining its 24v13 sibling in our second-generation family of high-power motor drivers.
This discrete MOSFET H-bridge can supply a brushed DC motor with up to 17 A of continuous current at voltages between 6.5 V and 30 V. Compared to its predecessor, the G2 driver handles a little more current and offers features like reverse-voltage protection, current sensing, and current limiting. For more information, see its product page.
New products: 3.3V, 5V, 6V, 7.5V, and 9V Step-Down Voltage Regulator D24V22Fx
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This post is a few weeks late, but I am following up on my original D24V22F12 12V regulator introduction to let you know that we now have 3.3 V, 5 V, 6 V, 7.5 V, 9 V, and 12 V versions of our new D24V22Fx family of step-down voltage regulators. These regulators all have typical efficiencies of 85% to 95% and can deliver continuous currents over 2 A in typical applications.
The new D24V22Fx regulators are priced lower than the older D24V25Fx family that they will be replacing. The two designs have the same size and similar current capabilities and input voltage ranges, but they do not have the same pinout and are based on different internal circuits, so there are fundamental differences in operation. In particular, these newer D24V22Fx regulators have much lower dropout voltages and provide a “power good” signal, and the newer design allows for higher output voltages (e.g. 12 V).
See the product pages for any of the D24V22Fx regulators for more information on these new regulators, or visit our voltage regulator category to see all of our regulator options.
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New product: Ion Motion Control RoboClaw 2x7A dual motor controller (V5)
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The RoboClaw motor controllers from Ion Motion Control (formerly Orion Robotics) can control a pair of brushed DC motors using USB serial, TTL serial, RC, or analog inputs. Integrated dual quadrature decoders make it easy to create a closed-loop speed control system.
Ion Motion Control has replaced the MOSFETS on the RoboClaw 2x5A Motor Controller (V5) with better ones and is now calling it the RoboClaw 2x7A Motor Controller (V5). The 2x7A can supply up to 7.5 A continuous and 15 A peak, up from 5 A and 10 A, and is otherwise functionally and physically identical to the 2x5A.
More details are on the RoboClaw 2x7A Motor Controller (V5) product page.
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New Pololu Zumo T-Shirts
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Robot enthusiasts: if you want to show your Pololu pride but covering yourself with Pololu stickers just doesn’t seem fashionable, we’ve got good news for you! Our new Zumo T-shirts are here, featuring a Zumo 32U4 robot within a sprocket-inspired border, accompanied by our call to “Engage Your Brain”. These pre-shrunk cotton shirts are available in several colors (royal blue, cardinal red, or charcoal gray) and a range of sizes.
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