With native USB, the incoming data goes into a USB packet buffer inside the chip, and if the on-chip buffers are filled, the PC will retry sending the data on subsequent USB frames (each is 1 ms). If you use a board like Arduino Uno or Mega, which receives using hardware serial, it can miss incoming bytes during that 1.5 ms time. When using the simple & easy NeoPixel library, interrupts are disabled during the entire LED update.
NeoPixel communication takes take 30 us per LED. (full disclosure, I'm the creator of Teensy) Any information about this or other solutions would be helpful.ĭefinitely go with a board that has native USB, like Teensy or Arduino Leonardo. I stumbled upon this page which seems to provide the data transfer requirements I'm looking for across USB. Would the trinket be able to provide such functionality or is there a better option available? I need one which is arduino based, cheap, has at least 3 analogue outputs and can receive the data from C# over usb while being able to power the LEDs effectively. I assume the best way to do so would be to use a microcontroller. What I would like to do now is to hook up a strip of 5 RGB LEDs to the system. This all works fine and I have already tested on part of the hardware. I can add visualization for pretty much anything I like. The data doesn't really matter but can be several things such as raw color data, audio volume, temperature information or average color of a bitmap etc. I have started working on a C# based application which given certain data, runs a certain filter and returns a percentage based RGB value which can be used to control the color of RGB LED lighting. Thanks so much in advance for any advice.I'm currently working on a project and would appreciate some advice on certain parts and which route to take. In the IDE the adafruit package only contains the Trinket 5V, which I select for compiling and uploading the sketch, this cannot have something to do with it right? So this shouldnt be a problem in the first place. Maximum current I measured was around 100 mA, as expected from the datasheet. I measured the voltage of the Adafruit trinket outputs to be close to the expected 5V.
The displayed current never goes above 8mA. If I use an external 5V power supply to simulate the signal output (istead of the trinket), everything in the circuit works fine. I'm powering the trinket via an external 12V, 3A power supply connected to the "Battery" Pin. In fact, the Relais does not work anymore at all and the LEDs are much darker, just barely noticable. I just want to control a Relais and some status LEDs.Īnd yet it seems like the digital out signals do not supply enough power to run the circuit properly. I'm having trouble shrinking a project of mine from Arduino Uno to an Adafruit Pro Trinket 12V.
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