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Comments by Patrick
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Powerful new U3V50x boost regulators
- 24 April 2020Hello.
The output capacitance varies across the different versions of this regulator, but it is on the order of a few hundred microfarads. Can you tell me why you are interested in this?
- Patrick
Video: Setting the Current Limit on Pololu Stepper Motor Driver Carriers
- 24 April 2020Hello, Mehran.
I am not sure if you are asking about the ceramic capacitors that are part of the stepper driver carrier used in the video, or the additional electrolytic capacitor used in the test setup. The values of the ceramic capacitors used on our many of our stepper motor drivers are shown in their schematics on their product pages. This video was made several years ago, so I am not sure what the exact value of the electrolytic capacitor used in the video is, but we generally recommend adding a capacitor with at least 47 µF of capacitance across motor power (VMOT) and ground somewhere close to the board to protect it from LC voltage spikes.
- Patrick
New versions of our 500mA D24V5Fx step-down voltage regulators
- 13 April 2020Hello, Gary.
These regulators are enabled by default, and during normal operation at the high ends of their current capabilities they can get hot enough to burn you, so we recommend you take care when handling them or other components connected to them.
- Patrick
SMC03A controlled by LabVIEW
- 17 March 2020You might be able to operate a Jrk G2 from something running one of those programs, but we do not have any resources specifically for that.
One approach would be to see if you can invoke the Jrk G2 Command-line Utility from your program. Alternatively, you can make a program to control the Jrk using its virtual USB COM port from LabView. Someone wrote a program like that for our Maestro, so you might check that out:
https://forum.pololu.com/t/labview-vi-for-micro-maestro/3774
The comments of this old blog post are not a great setting for this type of discussion about our Jrk G2 motor controllers, so if you have any further questions you might consider either posting to our forum or emailing us:
https://forum.pololu.com/
support@pololu.com
- Patrick
SMC03A controlled by LabVIEW
- 12 March 2020Hello.
We no longer make this product, but you might be interested in checking out our Jrk G2 Motor Controllers with Feedback:
https://www.pololu.com/category/95/pololu-jrk-motor-controllers-with-feedback
They support a variety of high-level control interfaces, including TTL serial and I2C for use with microcontrollers like Arduinos. We even have a library for using the Jrks with Arduinos:
https://github.com/pololu/jrk-g2-arduino
- Patrick
37D gearmotors: helical pinion gear, new 150:1 gear ratio, and performance graphs
- 5 March 2020Hello.
We do not offer the gearboxes or replacement gears separately.
If you have several gearboxes failing, then your application is probably applying loads that exceed what the gearboxes can handle. We can help you troubleshoot if you email us at support@pololu.com.
- Patrick
New products: G2 High-Power Motor Driver 18v25 and 24v21 (and price drops for other G2 drivers)
- 27 February 2020Hello.
The CS pin does provide an instantaneous measurement of the motor current when the H-bridge is driving, but we do not have specifications for the bandwidth of the signal.
Also, I am not sure if the CS pin's measurements are appropriate for what you are trying to do, so you might consider using an in-line current sensor instead. You can view our selection of current sensors here:
https://www.pololu.com/category/118/current-sensors
- Patrick
New product: G2 High-Power Motor Driver 24v13
- 27 February 2020Hello, Andy.
The driver is a MOSFET H-bridge, so you do not need external flyback diodes.
- Patrick
Robot Zero: a fast line follower for beginners
- 17 February 2020Hello, Hakan.
If you are using our QTR sensors library, then the "readLineBlack" function used to determine the array's position over a line works with both RC and analog sensors and provides the same output range.
https://github.com/pololu/qtr-sensors-arduino
In general, our library abstracts the type of sensor for all the higher level functionality, so you should be able to use many of the library's functions with either analog or RC QTR reflectance sensors.
If you have any further questions, I recommend posting on our forum since that would be a more appropriate setting for this type of discussion.
https://forum.pololu.com/
- Patrick
Video: Getting started with the Maestro
- 10 February 2020Hello, Joe.
If you want to power your Maestro from a wall outlet, all you need is an appropriate wall power adapter:
https://www.pololu.com/category/196/wall-power-adapters
From there, I recommend using our DC Barrel Jack to 2-Pin Terminal Block Adapter to connect the power to your Maestro:
https://www.pololu.com/product/2449
- Patrick