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  • UHF's Avatar
    12-01-2021, 09:46 AM
    UHF replied to a thread Circuit Board Design in Project Guidance
    Watch this guy's videos: https://www.youtube.com/c/NotesAndVolts/videos This one in particular:https://www.youtube.com/watch?v=VejO8rDdhzo
    3 replies | 195 view(s)
  • UHF's Avatar
    11-30-2021, 10:21 AM
    UHF replied to a thread lfo phase reset in Audio Projects
    This has come up several times before on the forum. Have a look here: https://github.com/ElectroTechnique/TSynth-Teensy4.1/tree/master/TSynth You need to set the phase_accumulator to zero by adding a sync() function...
    2 replies | 101 view(s)
  • UHF's Avatar
    11-26-2021, 12:15 AM
    This is also known as keyboard tracking, it's discussed from #11 here: https://forum.pjrc.com/threads/67218-Filter-Tracking-with-Resonance-issue
    1 replies | 204 view(s)
  • UHF's Avatar
    11-18-2021, 09:31 AM
    Hello again. :D I've received a new Teensy MicroMod and it works on both ATP board and my PCB. The other one failed in an odd way, refusing to work on all my PCBs immediately and then after a couple of weeks of swapping...
    35 replies | 2327 view(s)
  • UHF's Avatar
    11-05-2021, 09:40 AM
    It started failing on the ATP board yesterday and today. The MM isn't visibly damaged, I've looked at both sides under a stereo microscope. Just now, I've managed to get it programmed by using the ATP and working...
    35 replies | 2327 view(s)
  • UHF's Avatar
    11-05-2021, 02:54 AM
    I'm getting the same problem with the TeensyMM on the ATP board now. When plugging in, the Serial USB is not present in Arduino IDE and a simple Blink program fails to run. Pressing Boot on the ATP presents the...
    35 replies | 2327 view(s)
  • UHF's Avatar
    11-03-2021, 03:56 AM
    Hello Kurt, a) Yes multiple times. b) I've checked around the board and the pins on the M.2. USB to the M.2 isn't shorted. c) Yes, those are fine. d) I've tried a separate power supply and applied 3V3 both before...
    35 replies | 2327 view(s)
  • UHF's Avatar
    11-02-2021, 05:02 AM
    Thanks for the help Paul. I tried a tantalum instead and still no change. I put a scope on the 3V3 while it was attached to a pc and got this, which doesn't look particularly worrisome: I don't know! Nothing's...
    35 replies | 2327 view(s)
  • UHF's Avatar
    11-01-2021, 02:23 PM
    Yes, it's four layer: signal, GND, 3V3, signal. I've tested the voltages and GNDs on the M.2. I've removed and bypassed USBLC6 and soldered a new USB micro connector direct to pads 4 and 6 as seen in the photo. I can...
    35 replies | 2327 view(s)
  • UHF's Avatar
    11-01-2021, 11:00 AM
    Hello, I've spent some time troubleshooting my problem with USB and I've come to the conclusion that there's nothing wrong with the PCB or the track routing. I'm suspecting it's the power-on sequence. I'm using an...
    35 replies | 2327 view(s)
  • UHF's Avatar
    10-26-2021, 01:03 PM
    Hello, I'm still hitting a brickwall with this. I get the following log produced by Teensyduino 1.55 when I plug USB in: 20:53:41.537 (ports 2): WM_DEVICECHANGE DBT_DEVICEARRIVAL 20:53:41.537 (ports 2): nothing new,...
    35 replies | 2327 view(s)
  • UHF's Avatar
    10-25-2021, 12:07 AM
    If I apply 5V directly to the PCB, sometimes the TeensyMM operates and the LED blinks. Is there some start-up conditions not being met? I think all my GNDs are GNDed. Capacitance problem?
    35 replies | 2327 view(s)
  • UHF's Avatar
    10-23-2021, 05:08 AM
    I tried the Blink program and there's no flashing LED, so the TeensyMM simply isn't running. By the way, this is the extent of technical support on Sparkfun's dedicated Micromod forum:...
    35 replies | 2327 view(s)
  • UHF's Avatar
    10-23-2021, 02:41 AM
    Other than GND, 3V3 and VBUS power and the USB, are there any other mandatory connections? I haven't connected BATT_VIN/3, this is only needed if an ADC is being used? I think this pin can be used as something else...
    35 replies | 2327 view(s)
  • UHF's Avatar
    10-22-2021, 02:26 PM
    Detail of USB micro B to MicroMod. There is a USBLC6 IC to protect the MicroMod - I removed this and bypassed it which made no difference.
    35 replies | 2327 view(s)
  • UHF's Avatar
    10-22-2021, 06:42 AM
    I have the same problem. I've made a prototype carrier board with USB micro B. I'm getting either no recognition of the TeensyMM, USB unrecognised or the "SE Blank RT Family" problem. Putting the TeensyMM back into a...
    35 replies | 2327 view(s)
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About UHF

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About UHF
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TSynth - DIY Teensy based synthesizer - electrotechnique.cc

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