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  • DerekR's Avatar
    01-03-2020, 01:20 AM
    @Fritz A few of us tried using the WM8731 with the T3.6 and found a whole lotta problems with the I2C communication. The link to the thread is I2C problems with Teensy 3.6 and WM8731 codec. Paul ultimately found the...
    13 replies | 318 view(s)
  • DerekR's Avatar
    01-01-2020, 04:14 PM
    A bit off topic but if you are want to improve your soldering skills, here's a video showing the SMD assembly of a new Russian SDR (software defined radio) kit. It's not a tutorial, but it shows all the SMD soldering...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    01-01-2020, 01:16 PM
    @ETMoody3 Are you going to use solder paste and just apply it without a mask, letting surface tension draw the paste off the solder mask? I've seen videos of this being done and it seemed to work well. I'm thinking...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-31-2019, 11:33 PM
    @loglow, Will you be selling spare flex-cables when the kit is released? That would make it a lot easier to replace a wonky T4 on the breakout. I know it's possible to carefully remove and replace a flex-cable (I've...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-29-2019, 01:06 PM
    @loglow - Dan, I think these are great decisions for the board assembly options. I'm sure a lot of people would be intiminated by the SMD assembly requirement. And talking of SMD soldering, there are many You Tube...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-28-2019, 06:58 PM
    Well, that was easy!!! I just specified the CS as BUILTIN_SDCARD and everything started working on both breakouts. Thanks. So it's back to the grandkids...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-28-2019, 06:33 PM
    @mjs513 - You can never have enough solder braid ;) With my old, tired, shaky hands I can't get along without it. I've just been invaded (again) by a horde of grandkids, so Teensy stuff will have to take a back seat...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-28-2019, 02:57 PM
    My first fail! I cannot get the SD card to work on either of the two breakouts! I've tried several different cards of different sizes, checked their formatting on my PC (all are FAT32), but none are recognized by the...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-28-2019, 01:26 AM
    Dan asked us to stress USB_Host stuff in our testing, but I have a small confession: I have never dealt with USB_Host software, and don't really know anything about it. Nor have I dealt with CANbus :( Can anybody...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-27-2019, 10:58 PM
    @defragster et al Here's what I think was my order of assembly of the SMD components: C5 -> C3 -> C2 -> U2 -> C4 -> U1 -> R1 -> tiny tactile SW -> flex-cable socket -> SDcard socket -> C1 . Then the other components...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-27-2019, 10:12 PM
    @defragster: Some quickie photos. (I apologize for the quality, I'm the world's worst photographer, while my wife was a professional photographer:confused:. First the two completed boards: Then front and back...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-27-2019, 07:12 PM
    Two fully functional boards now. Both worked right away. I'm a happy camper...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-27-2019, 01:58 AM
    All is good!!;) Pin 36 is functioning! I did a quick check on all the pins and all are blinking. Congratulations Dan - it was a long journey for you, but I believe you nailed it this time! Derek
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-26-2019, 09:49 PM
    It's here (in Mass)! I'm assembling as we speak...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-23-2019, 02:52 AM
    It may (?) just arrive before Xmas - seeing as we are almost neighbors. I'll get to it asap, but family arrive tonight... the house will be a complete (but wonderful) disaster for the next few days :D Happy holidays...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-14-2019, 11:11 AM
    Great work Dan! It's a beautifully designed board and I think fixing the layout is the best long term solution for you. Would it be possible to get a new complete kit + an extra flex cable since I used all the...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-12-2019, 08:47 PM
    @loglow - Dan - I hope I'm wrong but I suspect there's a mismatch in the order of the traces on the flex-cable and the pcb trace to pin 36 at the flex cable socket :( This morning I got the replacement T4...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-12-2019, 04:04 AM
    Well, I remembered that I'd seen T4's at the local electronics store (You-Do-It Electronics in Needham, MA), so I jumped in the car and got the last one! So back in business tomorrow morning. A few more comments on...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    12-12-2019, 12:12 AM
    @loglow Dan, I've assembled the new board - thanks very much for including me. It went very well, much smoother than the first Beta - took about 3.5 hours with quite a bit of time spent working out a sensible...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    11-30-2019, 10:13 PM
    @robjohn... Nice looking unit. I really like the simplicity of your panel and display!! My unit(s) are still being built on protoboards with hand wiring underneath. I'll be delighted to share my control/display...
    26 replies | 1412 view(s)
  • DerekR's Avatar
    11-24-2019, 05:01 PM
    As promised, I'm back ;) .... @robjohn - To answer your questions: 1) No, I'm not using the Weaver SSB method here. Although I am very fond of it, I had too many problems with the Weaver method and the Teensy Audio...
    26 replies | 1412 view(s)
  • DerekR's Avatar
    11-23-2019, 10:17 PM
    Hi everybody, Sorry for being so tardy in replying, but I've been away from the forum for a few weeks. However, I'm now back ;) There are several questions here, let me promise to get back to you tomorrow and...
    26 replies | 1412 view(s)
  • DerekR's Avatar
    11-23-2019, 07:49 PM
    @xerox, I guess you are working on a ham radio project - SWR/power meter? That's very interesting, I just started thinking about a Teensy 4 antenna-analyzer/auto-tuner/SWR meter myself, for after I finish my current...
    15 replies | 710 view(s)
  • DerekR's Avatar
    11-23-2019, 06:56 PM
    @loglow --- Hey Dan, For health reasons I've had to take a break from things Teensy over the past few weeks, and things got away from me. I am finally catching up and am delighted to see the progress you've made. ...
    402 replies | 24455 view(s)
  • DerekR's Avatar
    11-23-2019, 05:57 PM
    Excellent! However, I have been using the PJRC Encoder library successfully (no missing steps) with the T4 in an application with two encoders for several weeks now. Is there any reason to switch?
    18 replies | 675 view(s)
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