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I get them from Adafruit...

Sorry, I don't have any real experience with a Mac. Since it is just a matter of substituting files in the Teensy folders, can you find the appropriate place on the Mac?

Yes... I'm working on it! Right now I have the SDR part (Audio processing, IQ generation etc) working in a stand-aloe config, and am concentrating of the RF hardware side (mixers. QRP linear...

Thanks @Frank B. We may be a little OT, but this is certainly something I need to understand re the T4.x when it arrives.

My understanding was that in a dual core machine, the two cores run...

Which is exactly what I am hoping to do for my AudioSDR software: run the heavy DSP stuff in the M7 core within the Audio Library framework, and the UI and display code in the M4, with shared memory...

Another quick GitHub update: Just to let you know that I"ve just uploaded another update with minor changes:
1. A more recent version of the manual (with source code for BareBonesWSPR)
2. An...

Definitely a +1 for an accessible reset pin. On my current T4.1 project the MCU is sandwiched between two other boards, and I don't want to solder to the bottom of the T4.1, so I'm having to use a...

Updates: Hi everybody! I've been involved in a large ESP32 project (a stand-alone WSPR beacon, with 20+ units now deployed) for several months and away from the forum, but still working on...

I've been away from the forum for about a year, but I'm now back. I had several notifications last night that the all new Arduino 2.0 IDE is now available for download. But it's not immediately...

@MarkT
I'd be interested to know how (and try) to do it. DMA? Certainly I can see a processor based frame buffer, but just writing a 256x(say)80 screen region pixel by pixel with 16 bit pixels...

@Clarkie1234
I sent you a very brief reply to your PM suggesting we correspond via email. I have a working 44.1kHz wide spectrum display for my audioSDR that works with Teensy 4.0/4.1, but I...

Hi Ron,
I've been away from the AudioSDR project for over a year at this point, but am getting right back into it as we speak with a Teensy 4.1 version. I'm also very familiar with the QCX/QCX+,...

@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...

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...

@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...

@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...

@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,...

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...

@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...

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...

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...

@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...

@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:...

Two fully functional boards now. Both worked right away. I'm a happy camper...

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

It's here (in Mass)! I'm assembling as we speak...

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...

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...

@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...

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...

@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...

@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...

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...

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...

@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...

@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...

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?

Hi Dan, Welcome back:D I presume you are aware of the two other break-outs that have been released over the past few weeks? Both use castellated cutouts to contact all of the under-board pads. ...

Yesterday I received two packages in the mail, (a) more T4s to destroy, and (b) samples of FRDM4236's board. So I got to work and assembled two of my slightly modified (stretched) versions of...

@dkryder,
Don't think I gave up without trying :rolleyes: I sent a couple of hours trying to prise them apart... It was just not possible to heat the pins through both boards and extract the pins. ...

My bad, in fact my very, very bad today:( :( :( So, I was all very pleased with myself this morning when I wired up breakout #2. Everything went swimmingly, I soldered all the castellations,...

Well, I had a very pleasant and unexpected surprise today! I had ordered my modified versions of Blackketter's breakout board in 0.8mm thickness from OSHpark before we learned of the woes with...

That would be fantastic, thank you very much. Yes, I'm in the USA (Mass). I'll PM you with the details.

I've been getting quite frustrated lately because I've tested most of my code on the T4...

Looks very good, and I'd certainly like to try it! I note you are using 0.8mm board thickness. Several of us have tried OSHpark with @blackketter's design with 0.8mm and found that routing of the...

Next questions: 1: What do think of Dan's (@loglow) SMD 2x5 header to connect to the lower board vs the castellated cut-out? Personally, having built many T3.6 breakouts from loglow, I like them.
...

Sounds to me like a "ground-loop" caused by common currents in the power line connection. These can be real nasty to track down because they can be dependent on your wiring. I've had that problem...

Hi guys - How did the pogo pins on Paul's beta breakouts work out - were they reliable? While playing around in KiCad this afternoon I started wondering if that might be the way to go???

Michael,
I'm very frustrated. I want/need to get going with using the T4 in real tasks, but unless I can get at all those pins, I'm stuck. I started to build a prototyping board this morning...

I would think that this is a hardware problem, not a software problem, unless your sawtooth has a very, very low frequency.

I don't follow what the sawtooth is actually doing in loop() is it just...

Re thicker boards - you can purchase male headers with longer pins that will make the soldering easier on the top. I have a few with long pins on both sides. And it's relatively easy to move the...