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Well the data are in. I tested my Teensy in another circuit with different program...and it works fine.

So...when I blew up Teensy #1, it took out some chips downstream. Thankfully I put all my...

I only put the 12 volts on D15, nothing else. Had I put it on Vin...I would have blown everything on the board...all TTL 5 volt devices. The only way I think of ensuring my spare Teensy is working...

Arrrggghh! Thanks defragster. I was hoping it would be the opposite. I'll start checking downstream of the logic chips. Better pull out the schematic.

Two photos: pcb layout and board with...

Since most of the questions here are quite intelligent, let me ask a stupid one.

I've been working with electronics for ...50 years at least, yet still managed to blow up a Teensy by applying 12...

I have an outdoor 16x32 matrix display that runs on a Teensy3.2 MCU. I'd like to be able to remote program it using Bluetooth or wifi. I had a USB cable sticking out of the display but the salty...

Good news is that I found a font that works for me and displays properly on my 240x320 display.
I wish ALL libraries were as well documented as yours. Adafruit documentation really sucks, sorry...

Kurt, I was trying out the example programs in your library and getting numerous errors. Eg, in the program ILI_Ada_FontTest3 (or 4) I get these errors:
I tired commenting out the offending font...

Loaded your library and, as you indicated, the sketch compiles. I fixed the warnings.
I had some success loading two fonts created with Font Converter (http://oleddisplay.squix.ch/#/home) that...

This is good information since I thought any improvements to any library would be backward compatible. Otherwise there should be a totally different naming scheme.
It sounds like the ILI9341_T3N...

I have a sketch that has a scoreboard with count-down clock to display on an Adafruit 240x320 GLCD (It's a TFT but I don't use as such) I'm using Adafruit GFX and the ILI9341 library ( #include...

I made a 16x32 pixel-LED matrix (5 feet x 2 feet) based on Adafruit's 16x32 smaller matrix board. Anticipating I would need more "oomph", I designed my I/O driver board with an Atmega328 AND a...

Problem solved. Moving from UNO to Teensy and using a GLCD (TFT) or not, makes for a lot of wiring and some coding changes. My TFT was at 8, not 10, so when I was disabling Chip Select, I was...

I'm reposting this as new because my previous two posts were incorrect.
I can run any SD or SDFat example sketch on a el-cheapo SD card module on an Arduino UNO with complete success.

I cannot ...

Don't reply. I'm an idiot! To make it easy to plug in the USB on my busy proto board, I mounted the Teensy UPSIDE DOWN...

I'm trying to access one of those cheapo SD cards with 5 pins, using SPI.
It works great using an Arduino UNO, I can read and write text back and forth. When I plug the board into a Teensy 3.2, I...