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Comments by Jeremy
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New product: Logic Level Shifter, 4-Channel, Bidirectional
- 30 July 2015Hello, Alessandro.
As you noted, this level shifter has a maximum operating voltage of 18V, so it would not be able to shift 24V to 3.3V. We do not have any recommendations for other level shifters that can do higher voltages. If you only want to level shift down from 24V to 3.3V, you might consider using a voltage divider.
- Jeremy
New revision of the Dual VNH5019 motor driver shield for Arduino
- 24 June 2015Hello, Tyler.
We tried running the VNH5019 motor driver in parallel by stacking two shields, and it seemed to work (we tested it up to about 12A); however, please note that this is not the method suggested by the VNH5019 datasheet. It recommends using each of the ICs as a half-bridge for combining VNH5019 drivers to increase the maximum current draw. You can read more about this in the "Using the Driver in Single-Channel Mode" section of the Dual VNH5019 Motor Driver Shield User’s Guide.
If you have more technical questions about the dual VNH5019 motor driver shield, our forum is a great place to ask them.
- Jeremy
New version of the Zumo Shield for Arduino - now with full IMU!
- 13 January 2015Hello, Jan.
We do not reveal the IC used for the boost regulator circuit on the Zumo. We do not want to commit to specific MOSFETs, but any generic MOSFETs that fit those footprints and match the obvious parameters should be fine.
- Jeremy
Servo control interface in detail
- 9 December 2014I noticed that you also posted this question on our forum; I have answered it there. Please continue the discussion there.
- Jeremy
New products: Discrete addressable through-hole RGB LEDs
- 8 December 2014In the picture, the board is powered by USB, which allows for more current then the 5V regulator can supply.
Also, as mentioned on the product pages for LEDs, an LED draws approximately 50mA when red, green, and blue are set to full brightness, which would result in a bright white light. This is not how the LEDs are being used in the picture.
- Jeremy
New products: Discrete addressable through-hole RGB LEDs
- 13 October 2014I am glad you got it working. Thanks for letting us know.
- Jeremy
New products: Discrete addressable through-hole RGB LEDs
- 6 October 2014Hello, Robert.
We have seen something similar to what you describe when powering the LEDs strip with a voltage that was too high. Could you tell us how you are supplying power to the LEDs?
- Jeremy
Simple LED circuit
- 28 August 2014Hello.
In general, the longer lead on an LED is the positive lead; however, since you cannot determine which lead was longer with them already cut, I recommend using the continuity test on a multimeter to determine which lead is the anode.
The LED voltage is usually determined by the color it emits, so you might try searching for an LED color voltage chart to determine its rated voltage. For the current, you will probably have to look it up in its datasheet.
It is possible to destroy an LED by connecting the polarity backwards, but the voltage required to break it is usually significantly higher than the forward voltage of the LED.
Using a variable resistor to determine a safe resistor value might work; however, it is probably easier to just buy new LEDs so you can get all the necessary specifications and calculate the appropriate resistor value.
- Jeremy
Troubled Child, a full-size autonomous vehicle
- 30 June 2014Hello, Ted.
Thanks for the kind words about our relay board. I am glad to hear that it worked well in Troubled Child.
Again, congratulations to you and the rest of the team for the amazing build and accomplishment!
- Jeremy
New revision of the Dual VNH5019 motor driver shield for Arduino
- 24 June 2014Hello, Max.
I am sorry you are having problems with your VNH5019 shield. However, the blog is not an appropriate place for troubleshooting your problem. Instead, you might post this on our forum with more details about your setup.
- Jeremy