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Sparcfun just posted an article on what Teensys can do: https://www.sparkfun.com/news/6708

Note, I built the audio examples on a Fedora 36 system using the Teensy 1.58 beta 2 release laid over the arduino 1.8.19 release. I was answering a question on the adafruit forum about mixing sounds (where the suggestion was to buy separate audio boards to play two sounds at the same time), so...

I happened to be answering another question on the Adafruit forum, where I dug up photos for my first Arduino Uno project (July - October-ish 2012). It got me wondering how long I've been using Teensys. I dug up the original kickstarter campaign for Teensy 3.0...

As some/many of you know, I have this thing for the Adafruit uncanny eyes project, tracking it from using it on a Teensy 3.2, 3.5, 3.6, Teensy 4.0, and Teensy 4.1. In the 3.x era, I used the 128x128 TFT and OLED displays (both from Adafruit and elsewhere). With the Teensy 4.0 and 4.1, I now...

I was modifying my all dancing, all singing neopixel libraries to add support for WS2812Serial. In looking at the header file, I noticed there was a busy function that returned a bool. I assumed this would allow me to poll whether the previous request had finished (assuming that show would be...

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 socket had come off. This was very much a jury-rigged prop. I didn't have time...

This isn't quite teensy related, but perhaps people know of an appropriate D/C power supply, it would be nice. I've been doing some runs at testing how much power my digitial cameras consume when doing various things like record 4K video. I've been using some fixed A/C to D/C converters and a...

I decided to add to my series of tests to do simple audio output to different devices (I already have DAC, DACS, Audio Shield, I2S, I2S2, and Prop Shield). So I cloned my source that does ToneSweep on both the right and left channels to target USB output. But when I start the program, it just...

I happened to be listening to the Desk of Ladyada where among other things she talks about bringing up the future feather version of the RP2040. She said that normally she likes to make test jigs from Teensy (unless she needed Raspberry Pi for some things). The RP2040 has UF2 disk drive for...

I wasn't sure if this should go in the 1.54 beta 5 thread, or one of the other threads. I haven't been closely following a lot of the work that is going on. I was wondering where we are in terms of being able to use LittleFS memory and more easily move files to/from the memory. Ideally long...

I have a Teensy 4.1 and it appears the PSRAM I soldered on to it either was mis-soldered or the chip does not work (external_psram_size is 0). I used Paul's test for psram: https://github.com/PaulStoffregen/teensy41_psram_memtest/blob/master/teensy41_psram_memtest.ino Is there a similar...

I tend to spend some amount of time designing Teensy designs for solderable prototype boards, bringing out various pin combinations, for example having 3.3v, ground, pins 0/1 for Serial1 all in a row to connect a serial device. But usually I get distracted in soldering up the large board with...

This is just a rant. I buy things every so often and put them in one of my someday boxes, but when it comes to actually using the feature, the someday box has disappeared. And it doesn't help that I was about 1/2 way (maybe 1/3 way or 1/4 way) done organizing things when I needed to clean up...

At the instance of my wife, I have been trying to organize my 'man cave' (otherwise known as the living room), and clear off all of the spaces that have various camera or electronic parts. To that end, I've been sorting things into various containers and drawers. One such area is rechargeable...

I tend to generally put stacking headers on my Teensys, such as this cut down to 24 pins: http://www.dipmicro.com/store/HDR40X1FL I was just idly assembling the components for attaching the ethernet to the 4.1. Note, at this time, I don't have a need for the ethernet, just adding it in case...

I decided to build a S/PDIF setup, using the following parts (I haven't received these parts yet): Paul's OSHpark PCB for the TOSlink: https://oshpark.com/shared_projects/KcDBKHta Digikey TOSlink: https://www.digikey.com/product-detail/en/PLT133%2fT6A/1080-1434-ND/2693983 S/PDIF to analog...

I was updating the unofficial wiki (https://github.com/TeensyUser/doc/wiki/Flash-Memory) on Flash and psram memory, and I added a section for psram sellers: Pjrc.com: https://www.pjrc.com/store/psram.html Aliexpress.com: https://www.aliexpress.com/snapshot/0.html?orderId=8013546769664011...

Rather than continue the discussions about adding a malloc layer for the psram memory on the Teensy 4.1 beta thread, it is probably better to open a new thread about it. Here are some open source malloc implementations (written in 2014)...

The Capacitive Touch tutorial page on PJRC.COM (https://www.pjrc.com/capacitive-touch-tutorial/) links to a tutorial that Mohannad Rawashdeh did to document using the touch pins in Teensy LC, 3.1, 3.2, and 3.6. Unfortunately that tutorial is no longer there...

I tend to like using Teensys to drive small number of WS2812B's for costumes. In the past, the LC was my favorite Teensy for this purpose due to the built-in level shifter for the A3/17 pin. But recently I moved to using the Teensy 4. Both of my previous LC's had solder damage due to heavy...

At times I like to use Adafruit Feather wings and I use the Adafruit Teensy 3.2 -> Feather adapter: https://www.adafruit.com/product/3200 And for portable projects like my wooden bowtie with neopixel ring, I like to use the feather adapter even if I'm not using feather wings, because it has...

I switched my little neopixel bowtie project to use a Teensy 4.0 (from Teensy LC). One of the things that prompted me to use the Teensy 4.0 was the on/off pin that can be used to turn off most of the Teensy functionality. However, I forgot since I'm powering the neopixels from VIN, that the...

I listen on and off to the Ask an Engineer segment on Adafruit on Wednesday night. Limor (i.e. Lady Ada) was talking about the @arturo182 board that uses the NXP 1062 chip (same as in the Teensy 4.0). She said the main reason you might need a chip with the speed of the NXP 1062 is because you...

As I was playing around the Audio shield, I was thinking for setups where you are using low powered speakers, that it would be really useful if adjacent to the line-out pins (L-G-R) there was a pin that brought out VIN. Yes, you have the VIN pin on the standard 2x14 row of pins, but it would be...

I'm going to the Arisia science fiction convention which is held in Boston over the Martin Luther King weekend. I will be on 4 panels (including moderating one). Now for 3 of the panels, I pretty much know what I want to talk about, but the forth panel is: The State of Microcontrollers - Art...

I noticed Adafruit recently added a set of stacking headers for their ItsyBitsy processors that use two rows of 14 pins with one row of 5 pins in the back. That seems like a familiar size. :cool: In looking at the part number (3883) they presumably added it some time ago, but it just popped up...

According to the SPI guide: https://www.pjrc.com/better-spi-bus-design-in-3-steps/ Two hardware related issues are: Add pull-up resistors for the CS pin (and D/C pin if used); Make the MOSI pin for the device tri-state. I'm wondering if there is a single chip that combines both. I...

I was looking at the adafruit forum, and somebody wanted to make a light saber and had found one of the guides using the Teensy 3.2 and prop shield to build it. But he went to the Adafruit page for the prop shield, and was told Adafruit had discontinued stocking it...

I was messing around, and I had some DFPlayer Minis lying around. These are rather simple MP3 players that play MP3 files from a micro SD card. You can control it via a serial line or via simple button press. I was thinking it may be simpler to use that for when I wanted sound and to drive...

In going through my mail (from the gamedunio3 developer looking at doing HDMI output), and following some google links, I noticed there is an Arduino -> HDMI board out there, that has an optional Teensy 3.2/3.5 shield. I believe it may have 5v input to the Teensy, so the Teensy 3.6/4.0/LC may...

I don't know the I2S protocol all that well. If I wanted to have an I2S input (such as the I2S microphone sold by Adafruit) and an I2S output (such as audio shield or the various I2S devices that decode I2S to analog speakers), do I need to use I2S1 (pins 7, 8, 20, 21, and 23) for say the...

I was browsing all 3 electronics candy stores (Adafruit, Sparkfun, and Digikey). I noticed that the Teensy 4.0 version of the Audio Shield hasn't made it to Adafruit or Sparkfun yet (Digikey gets their supply from both). I was actually looking to buy something from Digikey and combine...

Paul suggested posting shield suggestions here so it doesn't get lost in the future features & pinout thread: https://forum.pjrc.com/threads/57842-Future-Teensy-features-amp-pinout So I figured to begin the discussion. I'll post my first thought as a reply.

I was thinking of tricking out my Teensy 4.0, and adding flash memory to the audio shield. I also would be adding standalone flash if I'm not using the shield. In the past, I would use the prop shield when I wanted flash memory, but with the Teensy 4.0 not having DACs and the prop shield...

I've been following the process of the loglow breakout board: https://forum.pjrc.com/threads/57122-Teensy-4-0-Breakout-Kit And the second PCB designed by blackketter: https://forum.pjrc.com/threads/57672-Another-Teensy-4-0-Breakout-Board I'm wondering if somebody has designed a third...

I tend to want to use teensy in costume props, and sometimes I want to add sound support. This means small, lightweight, and can run on a single USB battery that also powers the Teensy and people can hear it maybe 1m away. It does not need absolute fidelity, or across the room sound support...

I was wanting to test a setup with stereo speakers. I wanted to use the mono ToneSweep, but instead direct to each speaker (i.e. do a run with ToneSweep on the left channel and then do a run on the right channel). This is so I could test whether I had each speaker connected properly. I could...

As I answer questions about the library, I notice some of the library pages have not been updated for Teensy 4.0. A meta question is whether it is time to make a separate Teensy 1.0/2.0/2.0++ library page to cut down on the clutter for the majority of current Teensy users. Main library page...

I just got mail from James Bowman who created the Gamedunio 2/3/3X smart displays, and the new release (1.2.1) now runs on the Teensy 4.0: https://excamera.com/sphinx/gameduino2/code.html https://excamera.com/sphinx/gameduino3/index.html

I was over at OSH park, and I noticed that the purple Teensy 3.2 (previously 3.1) was no longer for sale. But they now have the Teensy 4.0 for sale: https://store.oshpark.com/products/teensy-4 For USA buyers, it is perhaps the cheapest option to get a Teensy 4.0 ($18 with free USPS...

I was trying to solder wires to the underneath of one of my Teensy 4.0's. I had gotten some 7 pads soldered, and I was going back for pads 27 and 31, when evidently I put on a little too much solder in the wrong are, and now it won't turn on at all, and the 15 second push of the program button...

I've been thinking of soldering up a prototype board for Teensy 4.0 that brings out 2 of the three SPI buses (for uncanny eyes) and also brings out sound. Now, generally I do these one-off boards where I have several connection points with the pins laid out in a standard layout and I use a...

I was browsing Sparkfun's new products for August 2nd, 2019: https://www.sparkfun.com/news/2974 And they mention a 'new' version of the Teensy audio board. Granted the audio board did go to version 2 in January 2015, but that was 4 1/2 years ago. Is what Sparkfun is selling just the...

I was soldering up a Teensy 3.6, soldering stacking headers to all of the outside 48 pins, and soldering in normal headers for the USB/Aref/A10/A11 and USB header when I noticed I was running out of solder. I need to order some more solder, or perhaps get some from the store down the street...

I've been looking at the various low cost voltmeters and ammeters, and many can measure the total watts that goes through the circuit, such as...

I was thinking about changing some of my WS2812 code from using the Adafruit_Neopixel library to WS2812Serial, and I had a question about pin usage. Given you have several pins that can be used for each serial device, if you choose one pin, can you use the other pins for other uses? I assume...

I bought one of the SPI e-paper displays (specifically the Waveshare 200x200 display): https://smile.amazon.com/gp/product/B072Q4WTWH/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1 I found a full featured driver for it at: https://github.com/ZinggJM/GxEPD And it seems to work well on my...

I was waiting for a build to finish at work, so I decided to check out all of the open technology projects in kickstarter.com. Among the various projects I looked at, I see there is a new lightsaber project that uses a Teensy 3.5 to drive the unit. Hopefully in the 42 days the campaign has...

I picked up a glass jar that I wanted to put a Teensy LC in along with some neopixels/ws2812b's, and I'm looking around for a lipo battery that I could use. The dimensions of the jar are 3" long and 0.7-0.8" wide. Most of the lipo batteries that I'm familiar with are too wide for the jar, or...

I'm doing a Halloween project (evolution of my shutter release programs and the uncanny eyes display), and I want to combine several things on the same Teensy 3.2. I can use two teensys (one to do sound, neopixels, & shutter release) and the second to do the uncanny eyes program (this is a...