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Many of the GPS modules support an extremely precise PPS (Pulse Per Second) signal that can be used to synchronize the Teensy clock.
Many people are using this signal to create a Stratum 1 NTP Time...

Look in the Announcements category of the Forum.

Teensyduino 1.48 Beta #1

This is very sad news indeed. Daniel was very dedicated to the FastLED project, and to helping others.

One common application I have is to use a Teensy to read digital sensors (I2c, SPI, etc) and output proportional linearized analog voltage outputs to allow use with a traditional analog data...

That's a terrific project that can greatly benefit the open source community.

I'd really love to see an open source hardware & software solution for an instrument grade DAC with voltage and 4-20ma...

Can you elaborate.
I have the Audio Tools working great on my Teensy 4.0.
The current version of the PJRC audio board works well with it T4.0 but it is not directly stackable as some of the pins...

Below are the errors returned by the Arduino IDE when compiling the FrequencyTimer2 test.ino sketch example for Teensy 4-Beta2:

Error compiling for board Teensy 4-BETA2...

Below are the errors returned by the Arduino IDE when compiling the FreqCount serial_output.ino example for Teensy 4-Beta2:

Error compiling for board Teensy 4-BETA2
In file included from...

I was able to successfully compile the serial.ino FreqMeasure example, but failed to compile the FreqMeasureMulti serial.ino example for Teensy 4-Beta2.
The Arduino IDE returned the following...

I was successful to use olikraus' U8G2_Arduino library with Teensy 4.0 for an i2c 128x32 SSD1306 OLED display.
I used these settings for i2c port 0:
U8G2_SSD1306_128X32_UNIVISION_1_SW_I2C...

I can confirm that Teensy 4.0 works with VL53L1X i2c LASER time of flight distance sensor using this Pololu library.
17005

@defragster, Thanks for letting me know about the update.

I can confirm that the SSD1306 for I2C works under the latest Adafruit GFX Library downloaded today: ...

Hi All,
I just received my Teensy 4.0 Beta2 unit the other day.
I was able to compile and run the Adafruit SSD1306 library for an SSD1306 128x32 I2C OLED display.
Its using pins SCL0(19) and...

Thanks for the clarifications... OK I'm going back to whacking moles!

So I have spam delete privilege, but not "Plus" status.
Should I refrain from deleting spam for the time being?

Edit:
I guess what I really have is spam report privilege, But the spam gets...

How do the "plus" users determine the spammer's IP address?
Also where do we find the moderation area to view the sticky thread?

It's generally a good idea to post details and photos about your project and the code that is giving errors.
(See the "Forum Rule:" in red at the top of the page)

It's really the only way anyone...

Also sometimes turning off your virus scanning helps.

This problem also occurs with low quality or non-compliant USB hubs.

How are you supplying power to the Teensy?
Are the power supply grounds and the Teensy ground all connected together?
Some photos of your actual setup and the Code you are running would be helpful...

What is the power rating of the power supplies?
With 12 strips of 145 pixels and assuming around 50mA for a full white pixel, you can be drawing up to 87A (435W) per 5 V power supply ...

You can also use the method described in THIS POST to drive your Bicolor LED, from only a single pin.
This can give you Red Green or Yellow.

EDIT: Actually, Never Mind... this won't work because...

See This Post:https://forum.pjrc.com/threads/19336-How-to-repair-a-broken-off-Teensy

For anyone working on a project like this... I noticed while looking at the webpages on this that one problem seems to be that the waterproof transducers attenuate the signal by as much as 40x. There...

It's not the same one as above, but here are two other well documented Ultrasonic Anemometer projects:

https://soldernerd.com/arduino-ultrasonic-anemometer/
Edit: I just noticed that Antiath is a...

One idea might be to consider using rotary encoders instead of pots.
With encoders, you can have as many discreet positions as you like.
Encoders with detents also can give hepatic feedback so you...

Lorenzo,
Let's try isolate if the problem is with the encoders or with the LS7366R communication.
Hook up the Teensy as listed in the file header comments then try to run this program.
Power the...

Lorenzo,

I setup a breadboard with a Teensy 3.2, LS6377R and and Encoder.
I ran the code from Posts 7, 9, 20. All of them worked correctly.

For the code in post #20, I only changed the SS pin...

That page is in reference to Teensy 2.0 and 2.0++ which are 5 V devices

Check out this thread:
https://forum.pjrc.com/threads/26803-Hardware-Quadrature-Code-for-Teensy-3-x?highlight=hardware+quadrature

I've used this method successfully, but only on a Teensy 3.6.

Lorenzo,

It looks like your yellow sck wire is hooked to pin 13 on the Teensy, but the code is defining it as alternate SPI SCK pin 14.
Try to move the Yellow wire to pin 14.
Also can you please...

Scratch that comment about SS being tied to ground.
I found the board, and it's wired like this:


LS7366R Teensy
4 SS 10 SS
5 SCK 14 ALT SCK
6 MISO 11 MOSI
7...

Here's some code that I successfully used some time ago to read a 50,000 count encoder with a single LSI LS7366R with a Teensy 3.2.

For my application, I only had one encoder so I tied the SS pin...

No Problem.
It always makes people happy if you post some photos of your working project.
This thread may help someone else down the road that has similar questions or problems.

Do you need the frequency acquisition of all channels to be simultaneous, or can you multiplex the the inputs and alternate the samplings?
With a several MHz input signal, you will only need to...

You'll need a receiver that supports SPI Master mode to talk to the display controller. Possibly an ESP8266 or an ESP32 can do that but there will definitely be some software development involved to...

If you are powering the Teensy and PropShield from the USB, do not hook it to the +5V from the external power supply. If you really want to hook it to the 5V supply, while the USB is hooked up then...

You will definitely need an external power supply.
Each Pixel can use as much as 60mA, when full bright white. That's over 8 Amps! for a full white 144 LED strip.
Most USBs only supply 0.5 to 2A.
...

Opelnut,

Depending on your application, you could possibly use one Teensy to send the raw data via RF to a second Teensy that actually generates the display images which is wired to the SPI...

I recently purchased an ADS1256 Module for $17.
The TI ADS1256 is a 24 Bit 8 Channel ADC with SPI communication. It offers a PGA with up to 64x gain and acquisition rates up to 30kHz.
It does not...

artistinfla,

I just noticed that your code indicates using pins 21, 22, and 23 for the motor control signals.
Your schematic sketch shows the stepper motor controller hooked up to pins 7, 8, and...

FYI,

This tiny SD6128 Stepper motor controller can control stepper motors up to 36V and 2.2A with up to 128 microsteps and it works perfectly with a 3.3v input signal.

artistinfla,

You might consider using a level shifter to bump your 3.3V signals from the Teensy to 5V.

Two great examples are the 74HVT245 or the SN74VLC8T245.

Yes.
A 2 phase quadrature encoder has 400 pulses/rev for each channel, 90 deg out of phase. This gives 1 count per edge, and direction.

1600 counts per revolution is correct when using a true quadrature decoder with a 400 pulse two-phase Incremental Rotary Encoder.

If it's just a short run and you know someone with a 3D printer, you can print them out of NinjaFlex

It's not silicone, but very strong and flexible TPU.

This should do it: https://www.pjrc.com/teensy/schematic.html

Sorry,
I don't have experience with either the example LowLatencyLoggerMPU6050 from SDfat, or the ADC Library.

Kammateo,

While the T3.5 is 5V tolerant, the A/Ds only read to 3.3 V.

Try changing the conversion line to:

sensorValue = ((analogRead(A8)*3.3)/1023.0);

Note that it will fix at 3.3V with ...

This is what you get if you place it on a flatbed scanner:

FRONT: https://goo.gl/photos/sePEGseEpRnZzGKu7
REAR: https://goo.gl/photos/Lnf5srENy2ddvuAC9

Scanned at 24-Bit 6400 dpi - Epson...