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  1. Replies
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    Could you expand a bit? I thought this was a...

    Could you expand a bit? I thought this was a comparator?

    I've since updated by removing the pot completely and putting in a solid resistor. However, the falling edge of the square wave is wacko....
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    Last night I attempted to fix the oscillation by...

    Last night I attempted to fix the oscillation by changing my resistor values in my Schmitt trigger. My R1 value is soldered in as 510 ohms. The R2 value was 115000 ohms. I was able to completely...
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    I talked to an EE at work and he believes the...

    I talked to an EE at work and he believes the hysteresis needs to be adjusted. I'm going to try a different resistor next to my pot and see if I can get a better result.

    The shaft RPM reading is...
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    Yet it doesn't work in real life. The teensy is...

    Yet it doesn't work in real life. The teensy is unable to read that square wave apparently. Is there a different way I'm supposed to be filtering it? Should I debounce the wave?

    Why is half the...
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    Setup and loop: //====================...

    Setup and loop:

    //====================
    //Variables
    //====================

    //Pins
    const byte RoadspeedPin = 2;
    const byte Solenoid1Pin = 3;
    const byte Solenoid2Pin = 4;
  6. Replies
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    Teensy 3.2 Sensor Reading Issues

    Hello All,

    I'm attempting to read a sensor value with a digital pin on a Teensy 3.2. This sensor value is a Variable reluctance sensor in an automotive transmission. Here are the waveforms on my...
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    I was going to use software debouncing + setting...

    I was going to use software debouncing + setting an activation threshold once I determine if it's just bouncing or an actual special switch. My only concern is that the brake switch I've been able...
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    The curiosity is that the brake switch is old...

    The curiosity is that the brake switch is old school.. A 1990 Jeep Comanche. The switch looks to give a slight voltage if pressed very lightly, which continues to rise to a point as you press, until...
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    I have a bunch of Sharp optos, but if the switch...

    I have a bunch of Sharp optos, but if the switch is indeed variable, or I need to adjust the sensitivity, I won't be able to make any adjustments via an opto signal.

    Is there an analog equivalent?
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    Reading a Vehicle Brake Switch

    Hello everyone,

    I'm currently working on a Teensy 3.2 vehicle transmission project. I'll narrow down my question to specifics. There is a brake switch that triggers when the brakes in the...
  11. I'm going to try this when I get home tonight:...

    I'm going to try this when I get home tonight:
    http://overskill.alexshu.com/saving-loading-settings-on-sd-card-with-arduino/
  12. Replies
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    I wanted to give an update. My new Teensy's...

    I wanted to give an update. My new Teensy's won't arrive until today, but last week, I went to check the vehicle's fuel level by reading the ohms on the fuel sensor wire and received a strange...
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    I understand. The V/DIV is a 5v to 3.3v step...

    I understand. The V/DIV is a 5v to 3.3v step from a regulated TCU source. That's the only reason I used it.
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    Here is the schematic I based the power on. ...

    Here is the schematic I based the power on. Taken from work engineering department:
    http://i.imgur.com/Loatn4F.jpg
  15. Replies
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    I've purchased two Teensy 3.6 replacements. I'm...

    I've purchased two Teensy 3.6 replacements. I'm going to hand test each 12v opto and voltage divider to see if there's potentially a short that's sending 12v to a pin. I really won't know if I...
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    http://imgur.com/a/aX5Y8 This album has some...

    http://imgur.com/a/aX5Y8

    This album has some fluff, but it shows the circuit boards in pretty good detail. I don't have an exact schematic. It uses dual RA8875s on a Tristate buffer, along with...
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    These are the regulators I'm currently using,...

    These are the regulators I'm currently using, FYI: R-78C3.3-1.0, and R-78C5.0-1.0

    https://www.digikey.com/product-detail/en/recom-power/R-78C3.3-1.0/945-1394-5-ND/2652147

    and
    ...
  18. Replies
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    Do you think I could just get something like...

    Do you think I could just get something like this:
    ...
  19. Replies
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    No luck on the reset. It seems to be completely...

    No luck on the reset. It seems to be completely dead. The USB port actually burned me when I touched it on the Teensy just after about 30 seconds of on time. What I don't understand is how this...
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    Thanks for the reply! Great info! I use the...

    Thanks for the reply! Great info! I use the 3.3v regulator to power dual 7 inch display screens. I'm hoping they have a 3.3v version of these too!
  21. Replies
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    Teensy 3.6 fried in vehicle?

    Hello all,

    I've been working on a project for about 5 months now that centers around a teensy 3.6. It's an automotive dashboard display. It reads pins via optoisolators and displays everything...
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    I found the changes made in the RA8875 update:...

    I found the changes made in the RA8875 update:
    http://i.imgur.com/XnsJwqB.png

    I was able to resolve this issue by changing the following lines on my code:


    rowBuffer[col] =...
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    This is the only reference I can find to this...

    This is the only reference I can find to this issue. This user had to use an LCD image converter and store it as an array. I need to load the images from an SD card:
    ...
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    Alright, I've discovered that I can run all the...

    Alright, I've discovered that I can run all the other examples available without having messed up colors, so I think that means I can rule out the actual RA8875 library. It would seem that...
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    Here is the code I'm using. I've tried swapping...

    Here is the code I'm using. I've tried swapping out utility files, etc. I've verified the color defines. This code compiles correctly on both library versions, but the font only works on 0.70+,...
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    The source code for this is just the built in SD...

    The source code for this is just the built in SD card example, except pointing to my BMP file on the Teensy 3.6. Anyone have any ideas?
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    RA8875 Library Color Issue

    Hello,

    I've been trying to get my Adafruit_RA8875 display working with custom fonts. I've managed to get the fonts working by updating to the latest RA8875 0.70 library. Unfortunately, the new...
  28. Hey KurtE, I played around a bit with your...

    Hey KurtE,

    I played around a bit with your library a few months ago when I first got this. I think the tri-state buffer is the easiest way here.

    Adding to the thread, the blog post is here:...
  29. Thank you both for the replies! Paul, I believe...

    Thank you both for the replies! Paul, I believe I found a write up you did on this earlier. I'll search that and get started. It still seems relatively easy. Reading a bit more about the SPI...
  30. Feasibility of Dual Adafruit RA8875 Controllers and displays on a single Teensy 3.6

    Hello,

    Before I order a second screen, I'd like to get some input on this project. I currently have a single Adafruit RA8875 screen hooked up to a Teensy 3.6. this screen is responsible for...
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    Teensy 3.6 and RA8875 Fonts

    Hello all,

    I've been successful in connecting an Adafruit RA8875 to a Teensy 3.6. I'm able to load bump maps and default examples just fine. I'm trying to create a custom font by following...
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    Teensy 3.6 SD Card

    Hello,

    Starting a graphics display project with the Teensy 3.6. I've successfully integrated the Adafruit RA8875 controller with the Teensy 3.6. I'm not entirely sure how to load graphics from a...
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    Teensy 3.6 and Adafruit RA8875

    Hello all,

    I've been trying to get basic fonts working on the Adafruit RA8875 800x480 display. I can't seem to get the display working with any examples except the built in build test example...
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    My current solution to this is to order a new 7...

    My current solution to this is to order a new 7 inch display with an RA8875 controller, since I'll be wanting all available pins for inputs on this project.
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    I ended up using the built in USE_B_D_PORTS...

    I ended up using the built in USE_B_D_PORTS configuration. Once I hooked up all the pins, I defined my constructor line with my pins:
    UTFT myGLCD(SSD1963_800,3,4,9,10);

    I also attempted to...
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    Thank you!! Let me spend some time with this and...

    Thank you!! Let me spend some time with this and report back.
  37. Replies
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    Teensy 3.6 with SSD1963 7" TFT LCD

    Hello all!

    I am attempting to interface the following display with my Teensy 3.6:
    Link to datasheets and specs:...
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