Good work. I've wondering about these displays, and of course whether I could adapt the uncanny eyes code. In theory, I imagine it should just 'work' providing the eye drawn is within the circle of LEDs that are...
There are voltage level converters that can handle bi-directional conversion issues for I2C (RX/TX are unidirectional, so they should work ok with just about any logic level shifter). These are available at various...
You can also use the micro SD card solder pads underneath the Teensy 4.0. Back before the Teensy 4.1 came out, various people were soldering flexible cables to attach the SD card reader, and there were some PCBs that...
Others can give you more detailed information about this.
In almost all of the time, this is caused by code that waits for the Serial USB line to be initialized. Given you are being run off of battery, it never...
I'm not Paul, but I suspect it won't go into the Teensy proper, as it likely will raise the costs that relatively few people would use.
I've seen various USB C-PD trigger cables that when plugged into a USB C-PD...
It depends. Most can be.
However, if the sketch uses #ifdef ARDUINO_TEENSY40, it will have to be adjusted to #ifdef ARDUINO_TEENSY41 (or maybe use #ifdef __IMXRT1062__, which covers both).
If the sketch wants to...
Here one of the threads about the work in progress for exporting things like SD cards and flash memory file systems. Unfortunately, it still might take some work to get it to work with the prop shield:
...
There is work going on, but I haven't kept track of it. I think two of the repositories are here, but it would be helpful if the people working on it could post a link to a howto:
...
There is work in progress to make the various flash memories available as a USB removable drive. Unfortunately, I haven't had time to keep up with it. Maybe somebody else can chime in with the current state of...
Just to be clear, the issue is using the SPI devices with MQSR/MQSL and with the neopixel level shifters. If you don't use either the flash memory on the propshield or use an external SPI display, then it should be...
Many years ago, I did experiment with the propshield, neopixels, and SPI displays. I needed to use code to switch the pins from SPI mode to normal mode. KurtE suggested the code that I applied in this case:
...
You can use the mixer functions to change the volume.
However, I suspect the issue is the audio shield is designed for line out to be amplified before going to the speakers. When I've used it in the past, I would...
In theory, if you don't use the feature nothing. Note, given how pins 11 and 13 are used for the LED lights already, if you wanted to use the flash memory on a Teensy 3.2, you would have to be rather careful to go...
You can do everything but audio directly. The Teensy 4.0 does not have a DAC (digital to analog conversion) pin that the 3.2 used to emit audio directly. But the Teensy 4.0/4.1 does have the MQSR (pin 10) and MQSL...
Maybe it is time to add a few to my stock pile. I bought the last two at my local Microcenter.
Or perhaps dust off my SMT soldering skills and solder the SN74LV1T126DCKR's that I bought from digikey. Though I note...
FWIW, I have the following google spreadsheet that I've done over time to keep track of various microprocessor things. The first sheet is an attempt to track the pin differences between Teensy 3.1/3.2, 3.5, 3.6, 4.0,...
I believe all of the pins that take digital inputs on the Teensy 4.1 can be used for interrupts. IIRC, only the Teensy LC had restrictions on which pins could be used for interrupts. Note on other Teensies, there are...
Out of curiousity, what is the outlook for the long term of the LC microprocessors? At the moment, it seems to be in good supply. I like using them when I'm doing small neopixel cosplay products because it has the...
Well the simplest approach might be just to cut the solder trace that connects the USB and VIN. The pinout card (https://www.pjrc.com/teensy/pinout.html) shows where the trace that you have to cut is. IIRC, the first...
In general, if you go over to https://www.pjrc.com/teensy/td_libs.html, it has all of the pages for documentation about the Teensy libraries.
From there, go to the SPI page,...
I'm sure there are many different enclosures. I typically don't worry about 'fancy' enclosures.
One that I've used in the past is the Altoids tin. You can get a regular Altoids tin (eat the mints in it first), or...
To amplify what PaulS said, on the Teensy 3.x microprocessors, you can choose two sets of pins for the 3 SPI pins:
Pin 11 or pin 7 for DIN/MOSI;
Pin 12 or pin 8 for DOUT/MISO; (and)
Pin 13 or pin 14 for...
Cute. Though I'm having trouble thinking that a soldering iron would be made where the tip can't stand the temps. produced. But you never know these days. :)
Thanks. Yes, I don't have solder paste or a heat gun that isn't that directional. I'll maybe play with it, but as I said, I did recently pick up some more Teensy LC's. Fortunately, you can still get Teensy LC's (at...
My problem is with the USB header on place, there is no way to touch the tabs with the iron since the usb header is sitting on top of it. With PSrams and such, I can still see the top of the chip's feet and touch the...
I was doing a neopixel suspender for a local steampunk event, and I did a quick job to solder some wires to the Teensy LC (Vin, the pin 17 level shifted, and ground). Afterward the show, I noticed the micro USB-B...
The Adafruit ItsyBitsy headers are great. Though connecting VUSB might be an issue.
However, I find the Sparkfun stacking headers for the Teensy 3.2/4.0 to be less useful. The ItsyBitsy headers are 2 14-pin headers...
Unless you are using really old Arduino shields, I believe the modern shields are now capable of running at 3.3v as well as 5v. Of course individual devices may still be 5v only, but again, I suspect anything recent...
I assume you know about them, but in case you don't, Adafruit's ItsyBitsy processor has the same form factor as the Teensy LC/3.2/4.0 (other than the pins inside of the Teensy):
Short female header:...
Note, I'm a software guy, so possibly I'm off track in terms of physical characteristics of electricity....
I could imagine that one way to do it is carefully cut heat shrink tubing so it has holes at the solder...
In terms of pin assignment and such, I have made the following spreadsheet that attempts to document the pin changes between the various ARM Teensies. I also wrote a higher level summary in the unofficial Teensy twiki...
To the OP, note except for the basic devices (Serial1, I2C1, SPI1), things may be on different pins. So, if you have made PCB's, you may need to revisit the PCB and layout.
It is problematical. The Teensy 4.0/4.1 does not have a DAC pin like the Teensy 3.2/3.5/3.6/LC microprocessors had. This means you can't just hook up the DAC pin to the prop shield and have it work.
Now, the Teensy...
I am a computer programmer that has worked on compilers for over 33 years. I have been working on the GNU GCC compiler for over 20. Outside of work, I tend to be known for my steampunk camera (see http://www.steampunkmike.org for more details).
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