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  1. These sensors are pretty sweet. They are the...

    These sensors are pretty sweet. They are the Allegro A1454 and only run on 3.3V, unfortunately. One of the awesome things about these chips is that you can either use two external pins with various...
  2. Actual current limitation of Teensy 3.2 and rules of thumb about typical/max current

    I have a design where I need to power about 60 I2C hall effect sensors. Their datasheet says a typical draw of 2mA, but a max draw of 5mA. I called their tech support and they couldn't give a clear...
  3. Pretty cool that the Stuff Made Here guy made a Teensy plug in his robot hair cutter

    I suspect that because he ran his robotic hair cutter off of a Teensy, he probably uses it on a bunch of his projects. He explicitly called it out in this video.

    ...
  4. This is driven by an RPI digital output. It is...

    This is driven by an RPI digital output. It is driving four different Teensy's, each of which is connected over about an 8 foot cable.



    Yes, there is a common ground bus. Each of the cables...
  5. I don't think that is the issue. The data that...

    I don't think that is the issue. The data that gets recorded looks like a long list of:
    address,time,beam,bitpattern,

    In a single readout I see that time (which comes straight from the...
  6. Weird electrical problem after installing at client facility

    I recently delivered a consulting project I have been working on, but it isn't working as expected in the client facility. I had been testing this for months in my own shop and it was working...
  7. In a perfect world with infinite resources, I...

    In a perfect world with infinite resources, I would agree with you. That being said, instructional lab budgets are tight and I feel bad about making students replace parts when a little bit of...
  8. Laser gates for measuring sports ball velocity

    For some contracting work this summer, I built some laser gates for detecting the transit of a baseball/softball at up to 135 miles per hour. The Teensy 4.1 has been an incredible board for getting...
  9. Making Teensy 4.1 carrier board 5V tolerant

    I have been looking at making a carrier board for the Teensy 4.1 for the Mechatronics course that I teach that has some DC motor drivers, connectors for DC motors and encoder, stepper motors, etc....
  10. I think I will probably make the board mod I...

    I think I will probably make the board mod I mentioned above, where I cut the trace from the micro-fit connector to the 3.3V pin, jumper from the micro-fit connector to the VIN pin, and change my...
  11. Am I completely misreading the Teensy 4.1 pinout...

    Am I completely misreading the Teensy 4.1 pinout document? I think that upper right pin in my schematic is ground, the lower right pin (without a connection) is the 5V pin, and the lower...
  12. Well, I think someone answered my question,...

    Well, I think someone answered my question, though it took a bit of searching to find it.
    ...
  13. Teensy 4.1: I think I made a mistake on my carrier board

    I think I was being dumb when designing my circuit board that would be the carrier for the Teensy 4.1. Since all my extra circuitry would be running off 3.3V and I was worried that the 250mA of the...
  14. I can do all my timing analysis as a...

    I can do all my timing analysis as a post-processing step, so my plan was to do something like the following (except extending it to read all of GPIO6, GPIO7, GPIO8, and GPIO9 which span my 34...
  15. You are correct. I was mistakenly looking at the...

    You are correct. I was mistakenly looking at the Teensy 4.0 section of that header file when counting :(

    As an additional question (though I should go home and test this on the scope), any idea...
  16. I have been wondering the same question. I have a...

    I have been wondering the same question. I have a project where I am trying to get the relative timing of 34 pins going high and low. I haven't decided whether to use an interrupt on change on all of...
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