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Which external ADC (and or module) did you wind up using. I may have a need for something similar.

@Donziboy2, You could scatter the screen updates across intervals (e.g., print only say 20% of the info each interval), so as not to delay processing too much for that interval. Also, how about ILI9841 boards, they offer 320x480 for less than ten bucks?

I am really liking the specs of the INA233AIDGST from TI. It is a High-Side or Low-Side Measurement, Bidirectional Current and Power Monitor (16-bit ADC built in) which seems perfect for use with a current load. The only problem is reconciling the price difference between the chip itself...

Just picked up ten of these bad boys for $5 a piece (all in with shipping) from a reputable seller on eBay: IXFZ520N075T2 (Mouser link) ##### (Datasheet) I don't know how I am going to mount them to the heatsink but at 1.6 mOhms of Rdson, I'll figure out a way! Update...

I guess I was ignorant of the commercial vehicle sector when it comes to high levels of DC - was thinking more of home/shop/factory (stationary) electronic devices...

Are there any devices any more that even use more than 24 V DC any more? It seems like it's 24 V or less for pretty much everything these days, with 12 V becoming the new high. The trend is clearly towards lower voltage and higher current. Also, battery wise it's pretty much 6/12/24 V. I guess...

Heck, I'd go for 24-bit ADCs (with 19-20 ENOB) if I could get them to communicate with the Teensy easily (and to get a max REF voltage of 5 V or more, if possible). I bought a board on ali-express, but there was no library support and I couldn't get it to work.

One hell of a cooling solution you say? Well I really got lucky in this department and picked this sucker up for a total shipped price of $45 on eBay: For size references: I will mount two high static pressure 120 mm fans side by side to push air through it (and maybe two more to pull on...

I am just going to reply to the pricing aspect of this for now, I still have to digest the rest of the info: Consider buying them on eBay, especially the Buy it now or Make an offer variety where you can low-ball, from reputable sellers as (new [unused] old stock (and make sure they are...

You are clearly referring to the thermal instability limitation which would often cause the downtrend SOA line to have a steeper downward slope at higher voltages (and which requires actual measurement vs. theoretical calculations). This would derate the currents shown in the SOA further, unless...

@Donziboy2, the IRFP250n is also not characterized for linear operation. I don't know why pro load manufacturers use it, unless they did their own statistical analysis of failure rate. It is a very good idea to watch Kerry Wong's YouTube video on the subject where he goes into quite a bit of...

Looking at Figure 8 of the Datasheet at the link you posted, you will notice that the safe operating area for this Mosfet is only characterized to 10 ms. The implication is that we do not know what the DC curve looks like or even whether operation for periods in excess of 10 ms (at any...

Can these boards be purchased or do we have to order the PCBs and build them ourselves?

Hi, I am back on the dummy load bandwagon and decided to chime in once again. Reviewing your latest schematic, I noticed that you plan on using IRFP150MPbF MOSFETs. Pouring over the datasheet for this MOSFET, I noticed immediately that it is only characterized for safe operation to a maximum...

Is there a write-up somewhere on how to get the ADS1256 to work with the Teensy 3.6? I tried using the Flydroid library with no luck: https://github.com/Flydroid/ADS12xx-Library. The board I have has: SCLK DIN DOUT DRDY CS RESET DGND DVDD ..., on one side of the board and differential inputs...

Speaking of all of this, is there a sample circuit anywhere showing a Teensy 3.5 or 3.6 wired to a MAX485 board like these ridiculously cheap ones on ali express: MAX485-Module-RS-485-TTL-to-RS485-MAX485CSA-Converter-Module-For-Arduino

Perhaps a stupid question: In reviewing multiple electronic load designs, including yours, it seems like they are all designed to effectively place a short on the power supply being tested with the load (well not exactly a dead short, but whatever the Rds resistance of the MOSFET(s) happens to...

If you declare the Teensy as master, how does the many Teensys to One Pi work out (see the picture in post #17, above)?

Just want "as fast as possible" data transfer from the Teensys, which collect the data, to the Pi (or other master device that captures telemetry data coming from multiple sources). This is a fairly common use case.

Does this library support the use of a Teensy 3.6 as an SPI slave to say a Raspberry Pi 3 B or some other SPI master device? I am especially interested in multi-Teensy configurations like the following (sorry for my vain attempt at ASCII artistry, but it gets my point across): Raspberry Pi 3 B...

That's a lot of writes. I'll stop worrying now...

So perhaps a stupid question, but wouldn't it make sense to communicate from a Teensy to a Raspberry Pi 3 and just send data having the Raspbery Pi 3 display it over HDMI to a real high resolution 5/7 inch screen?

I am very intrigued by the ePaper display. I wonder why these are so low in the resolution/DPI department, given that they are monochrome? Also, this disclaimer on the page is rather ominous: Limited by the hardware processing, it usually takes 1.5s to refresh each single frame image...

What is the limit on how many times you can upload a program to the Teensy 3.5/3.6 before wearing out its flash. Very often while troubleshooting, I upload tens if not hundreds of times and am wondering how long it will be before I can "upload no longer" due to bad memory cells.

Does Teensy 3.6 actually do dp floating-point arithmetic (e.g., multiplication/division) in hardware? Or is this stuff emulated somehow?

I have both a 3.2 and a 3.6. I just finished soldering the pins on the 3.6 and wanted to get info on max performance to see how I can use it for my needs. In fact, you commented on my pics of the 3.6 in: Teensy 3.6 ultra high-res high quality photos

Does it make sense to passively heatsink the CPU on these for even more overclocking potential beyond 96 MHz (e.g., Arctic Silver + a heatsink stolen from an old video card)? Is it even possible to overclock beyond what Teensyduino supports? Edit: I meant 240 Mhz for the 3.6...

Nice! I just realized you can use your mouse wheel to zoom in and out of that. Actually, with regard to the milling, the smaller plated through holes (i.e., not the outer connectors) are quite a bit off. This is especially visible in the center of the board. These are less important than the...

If you want to get an MPU-9250 board cheap and with free shipping and pins: Ali express link. Total cost of $4.48 delivered to US address

I noticed that as well. Such is life when electronics are Made in China. Do keep in mind that we are nitpicking a couple hundred μm offset here (i.e., no biggie electronically/mechanically and only relevant for those with OCD and looking at high res images). The USB connector is also tilted by...

I have posted links to very high resolution images of the front and back of the board in the General Discussion forum: Forum post with links to high-res photos of the Teensy 3.6 (front/back)

Here is a high-quality macro photo taken of the back of the final release Teensy 3.6 (i.e., this is not a beta board). It is cropped to a resolution of 3555x1146 (4 MP cropped). It was taken by me at a photographer friend's house using his Canon 6D, 180/3.5L lens at f/13 ISO:100, lens/lighting...

The thing is that the LM2776 produces a crazy amount of output ripple (>100mV for small currents). For this reason, I am not a big fan of it in combination with a linear voltage regulator (like the LM317), which has very low ripple. I would rather use an LTC1550 which, although not being able...

Is the FFT and display code your own, or is it some library?

Sounds very reasonable - good luck!

Speaking of Ethernet, is there any ETA on some sort of Ethernet shield, module, or connector for the 3.6?

Perhaps a stupid question: What can you use this for? Finger gestures for input? Seems pretty expensive for that...

The Pi Zero is a giant scam. It costs $5 in the US for the board, but you can't buy more than Qty:1 anywhere in the US and then wind up being gouged $10 for shipping on it, bringing the price up to $15 and making it completely non-competitive with other boards.

Wow, what is the resolution on that display and is it wired directly to the Teensy (and if so, which Teensy?) i.e., what are you to the left of the display in the video :cool:

Cool! Keep us posted...

Could you please post a link to OSH-Park for this, if you've already uploaded it to them, so that the rest of us peeps can order them, too? :cool:

For 4 Mb/s, why not just use block transfers over high speed SPI (i.e., from SPI1)?

Is there anything (code wise) available for using USB1 on the Teensy 3.6 as a USB device (and not host) with a full on Linux mini-computer such as Raspberry Pi 3. I want to pipe in telemetry data from the 3.6's ADC, among other things, at a high rate and take advantage of the high speed...

Would it be possible for a Teensy 3.6 to do HDMI out? The processor is certainly fast enough, but I am not sure what else would be needed to accomplish this (short of a full blown OS and a graphics coprocessor of some sort). I guess I am hoping for either USB -> HDMI, using the secondary USB...

How fast can the 3.6 render text to the ILI9341 via SPI (i.e., full refreshes of all text per second)? If I wanted to display the following four lines of voltage/current readings (in different colors) on the screen in a format like: 1.000V/20.000mA 2.000V/10.000mA 3.000V/5.000mA 4.000V/1.000mA...

It's definitely not like this, because, in a nutshell, the underlying circuitry is different, including protection of each circuit from the input noise (i.e., it's effective PSRR [Power Supply Rejection Ratio]). Now without a doubt, a more noisy supply will result in more noise entering both...

Is this true even with multisampling and averaging? I seem to be able to get close to 15 ENOB on the Teensy 3.2 with enough oversampling (e.g. >=1024), even on a breadboard and using the crappy (IMHO) 1.2v internal reference, but when battery powered via a 9V through an LM317 to produce 5V (and...

From the page: ... 62 I/O Pins (42 breadboard friendly) 25 Analog Inputs to 2 ADCs with 13 bits resolution (Should be 2 SAR ADCs with 16-bits of resolution) 2 Analog Outputs (DACs) with 12 bit resolution ...

Offset - not an issue (easy to correct in software) Noise - not sure how bad it is internal vs. external (but, external costs money and space) Input Z - Should be better or the same going through the PGA, no?

As has already been pointed out, I guess one would have to be very careful cutting the 5V input to the LDO for non-USB power. I am not sure how careful, because it is not clear where the trace to be cut is on the 3.5/3.6.