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  • bicycleguy's Avatar
    12-24-2021, 05:57 PM
    Looks like the fills on the pcb are not connected to ground or anything. Perhaps they are picking up noise and messing up the clk T13 to 8. Sometimes a 100 ohm resistor in series with the clock near the Teensy can...
    13 replies | 803 view(s)
  • bicycleguy's Avatar
    12-22-2021, 10:13 PM
    Need to get that Teensy near the cold side of that cryocooler :) Interesting problem. FYI: Changing CPU frequency on the fly in a vertically mounted socketed T4.1 results in a Time Constant of approx. 30 seconds....
    3 replies | 449 view(s)
  • bicycleguy's Avatar
    12-21-2021, 08:24 PM
    A typ PID loop will cause + and - deviations, especially if you want fast response and use a high pwm freq. Regardless, the MIC4416 spec for VS is 4.5 minimum. There is nothing that indicates otherwise. A blown fuse...
    96 replies | 2408 view(s)
  • bicycleguy's Avatar
    12-21-2021, 05:58 PM
    I don't understand. You mention a PID loop yet I don't see any possibility of running the motor in reverse direction in the schematic.
    96 replies | 2408 view(s)
  • bicycleguy's Avatar
    12-20-2021, 08:34 PM
    Installed ok on Mac Catalina 10.15.7 Thanks for the zip, avoids a lot of hassle. Sorry, haven't tried any of the latest changes. log4j no longer in Arduino, just my banking client software:mad:
    18 replies | 982 view(s)
  • bicycleguy's Avatar
    11-19-2021, 05:25 PM
    Just wanted to report on Mac Catalina 10.15.7 a fairly complex T4.1 web server program that moves a directory full of sub folders and files from the SD to the PSRAM on startup works with no changes. Probably my...
    25 replies | 2160 view(s)
  • bicycleguy's Avatar
    11-19-2021, 08:17 AM
    @joepasquariell The count_prev = 0; in the library seems to have done the job and fixed the problem in some other programs I'm working on. thanks
    25 replies | 2160 view(s)
  • bicycleguy's Avatar
    11-18-2021, 07:52 PM
    Installed ok on Mac Catalina 10.15.7. Not sure if me or FreqCount() is still not able to have its interval changed and expect good output in the first cycle. This is the T4 FreqCount example code modified to show...
    25 replies | 2160 view(s)
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Teensy 4.0 + 7" display + PCB 12-24-2021 05:57 PM
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12-11-2015