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I've been hitting a roadblock where the I2C bus gets wedged during resets and sketch loads and requires a full power off to restore sanity. The setup is a Teensy 3.2 attached to three custom boards each running a SAMD11 with an I2C slave code and pull up resistors. This setup works just fine...

Please disregard this post. It doesn't look like FastLED is performing transactions properly so that seems to be the issue.

I'm creating a clock for my daughter that has a 60 Neopixel ring AND a SSD1306 OLED display. I am using a Teensy 3.2 and a prop shield to level shift and buffer the neopixels. I've been noticing that I cannot seem to get the SSD1306 to work AND the strip of neopixels. I am using the adafruit...

I think I found a dead ringer for the type of problem I had. This time I caught it on a logic probe. In the trace below, I move the rotary encoder up 2 detents slowly. The first movement read out 0-4. GOOD. The next one oscillated between 5,6 and then landed at 4 rather than 8. 5 4 5 6 5 3...

Not sure if this is a technical support question or just a general request for project help. I'm working on a project called Makernet where I am designing lots of little devices that are all accessible on an I2C-like bus. This is a OSH project. This project aims to use a Teensy as one of the...

Brilliant! thanks for the digikey numbers! Really appreciate the advice and help with this project.

That nailed it. Thank you! I had neglected vBat. As soon as I connected it, it worked. Even worked with a 16mhrz PTH crystal that was hacked onto SMD pads. :) The previous version must have been a bad copy of the MCU or maybe got ESD damage along the way. I realized the problem with the CAN...

Hi Teensy community - After successfully getting a DIY teensy working for one of my hobbiest projects last year, I decided to try again and this time I've run into trouble. I was hoping someone could help shed some light on what I should do next to troubleshoot. I've narrowed things down to the...

I'm looking to build a small portable toy for my daughter that plays different sounds. I've had a lot of fun using the Teensy 3.2 + prop shield to generate synth music following Paul's many examples, but now I want to integrate this into part of a larger project. My ideal situation would be...

Question re: cap touch Sorry to be resurrecting a super old thread but I'm curious if TouchRead() requires analog stuff. If I take off the analog sections will I still be able to use capacitive touch?

First, a big thanks to Paul and everyone here. The Teensy system has been the bedrock of my hobby projects for the last 3 years. I finally got around to trying to make my own teensy, mainly so I could one day build something more "integrated" and compact and also to level up my weekend hacker...

I'm seeing some odd behavior with Kaiman filtering and the prop shield. After a minute of great heading calculations, suddently the readings become sluggish and incorrect. I am using Teensy 3.2 on a IMU prop shield, running at 72Mhrz. My application is fairly straightforward: I have a ring of...

That would be great! Look forward to an update. In terms of the APA102s, you actually don't need to have them hooked up to trigger the issue. They don't write anything back. Similiar issues occurred with other SPI libraries for the APA102s. I've been studying the source code on and off and...

Thanks for the reply. Still love the uber-performance of this library. Sadly, I'm having a lot of trouble integrating it with my project that drives APA102 LEDs. I suspect that something in the SSD library is not cooperating with other things that use the SPI bus. Setting FASTLEDTEST to 1 int...

Hah, doesn't it figure that the very next thing I tried seemed to fix part of the problem? I downloaded a fresh copy of FastLED and forced to checkout b01f941. Problem resolves. Still very strange about the USB vs. LiPo. DO I have anything to worry about in terms of hardware?

I just received my prop shield with IMU and Teensy 3.2 and I've encountered a strange, repeatable hang using the FastLED library. I am using the "FirstLight" sketch with the examples provided by Paul on the main page to raise pin 7. When powered by USB, the whole teensy freezes after about 5...

Thank you! Just wanted to say thank you for this. Just an hour ago I was looking at dismall refresh rates using the adafruit library and then came across your library and wow -- 60FPS on a 128x128. Kind of a bummer about the lack of overclocking. But my application may not strictly need the...

I'm building a cool toy for my daughter with the Teensy 3.1 and a SSD1351 from Adafruit. I'm running into trouble getting access to the SD card while also driving the display. When I use the adafruit libraries, all of the examples work although the refresh rate is terrible. In search of a better...

Followup Super cool! I got the cross GCC compiler to load, but I'm still trying to figure out how to pull in everything so that a sketch that works properly on a desktop can be compiled on the rasp-pi. Theoretically, if you compiled and linked everything in the cores/3.x directory using the...

Thanks. I am using a Macbook Pro Retina 15" from about a year ago, and it definitely seems to have a different behavior with the Teensy than with the FTDI cable. Will try this change and see if it makes a difference. To the other poster who cautioned about the max power draw of teensy pins...

I just ported over a USB-powered FTDI+AVR project to a Teensy 3.1 and noticed many voltage sags during high loads on some motors and 12V lamps that I didn't see before. I am driving an 1970-era aviation electromechanical display with a 12V step-up converter. I recall reading that the FTDI...