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Teensy 4.1 Development Board

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Re: Teensy 4.1 Development Board

#201

Post by subhobroto »

sgt wrote: post #192
subhobroto wrote: post #10

With the supercheap sub $5 ESP32/STM32 boards (both have Arduino core support) and their equally cheap add onboards for camera, ethernet or USB OTG - who exactly are using the Teensy line today and why? I'm genuinely curious.

Would this Teensy be suitable for real time audio processing? I mean little-to-no latency.

> little-to-no latency

I don't follow Teensy deeply but both the ESP32/STM32 are being used for real time audio processing.

I'm using it to decode DTMF without using a one more DIP IC.

I'm sure there's some latency involved but for my use case, the bang for the buck is great.

Re: Teensy 4.1 Development Board

#202

Post by FpUser »

subhobroto wrote: post #200
FpUser wrote: post #149

I remember using Teensy based on AT90USB1286 microcontroller for 4 quadrant 3phase AC motor torque control. Worked like a charm. Glad to hear they're stilll in business.

Have you been keeping track of the 4 quadrant 3phase AC motor torque control using STM32? The idea is to run these 3phase AC motors off DC

I am not sure I understand the question. I already stated the controller type. I have not done anything with STM32 but if it does have proper PWM and timers I assume it can bee done just as easy.

Torque control is more complex than just simply running 3ph AC motor off DC.

Re: Teensy 4.1 Development Board

#203

Post by HeyLaughingBoy »

yjftsjthsd-h wrote: post #183
HeyLaughingBoy wrote: post #123

Earlier quoted context omitted.

I use Arduino Nanos as modules in larger systems. I can buy them for $2.50 each, which is far less than it would cost me to build them.

If you can get them for $2.50, then yeah that's competitive, but the official site lists the Arduino Nano at $20.70 and it appears to be weaker than the Teensy-LC at $11.65, or ESP 8266 series at obvious first pick.

Oh, I definitely agree with you on that. Unless you're a school or similar institution that needs to go with the safe choice, I really don't understand how Arduino™ makes any sales.

The clones are so much less expensive than the official Arduinos that there's no comparison. Even the versions that Adafruit makes that IMHO, improve the design cost less than the official arduinos. So it's not a surprise that the Chinese clones will be dirt cheap. I'm not complaining though. I have a board where the Nano (clone) itself is by far the cheapest "chip" in the BOM. Precision analog devices are expensive and my 50 or so boards sold each year can't compete with the Shenzen manufacturers' economies of scale.

Re: Teensy 4.1 Development Board

#204

Post by analog31 »

floatrock wrote: post #193
analog31 wrote: post #146

Earlier quoted context omitted.

I wouldn't hesitate to do so. It all depends on what kind of price / volume you're trying to target. For very short run, garage-shop types of operations, not only is handling surface-mount a headache, but there's a learning curve to getting any kind of circuit boards manufactured. In addition to these microcontroller boards, you can find "breakout" boards for a variety of sophisticated components, and combine them on…

Do these people write about what they do? Make and Hackaday are great for fun one-off projects, but I don't really know much about the world of small-scale commercial like this. Make went bankrupt because they couldn't support operations on a hobby budget... I'd love to know what the next step up looks like, especially if it's some large esoteric agricultural machine.

They rarely blog about it. Many of them are old school engineers, some are retired from engineering careers.

Re: Teensy 4.1 Development Board

#205

Post by subhobroto »

FpUser wrote: post #202
subhobroto wrote: post #200

Earlier quoted context omitted.

Have you been keeping track of the 4 quadrant 3phase AC motor torque control using STM32? The idea is to run these 3phase AC motors off DC

I am not sure I understand the question. I already stated the controller type. I have not done anything with STM32 but if it does have proper PWM and timers I assume it can bee done just as easy. Torque control is more complex than just simply running 3ph AC motor off DC.

> Torque control is more complex than just simply running 3ph AC motor off DC.

Fair enough, I got a bit too greedy with my wants.

Right now, I'm interested in running 3ph AC motor (or brushless DC motors) off DC using STM32 but having a hard time finding good open designs with affordable (DIY) feedback systems.

Re: Teensy 4.1 Development Board

#206

Post by FpUser »

subhobroto wrote: post #205
FpUser wrote: post #202

Earlier quoted context omitted.

I am not sure I understand the question. I already stated the controller type. I have not done anything with STM32 but if it does have proper PWM and timers I assume it can bee done just as easy. Torque control is more complex than just simply running 3ph AC motor off DC.

> Torque control is more complex than just simply running 3ph AC motor off DC. Fair enough, I got a bit too greedy with my wants. Right now, I'm interested in running 3ph AC motor (or brushless DC motors) off DC using STM32 but having a hard time finding good open designs with affordable (DIY) feedback systems.

I can't really help you much here. When I first needed it few years ago I did google search and found bunch of articles on motor control (from Microchip I believe) that also had some designs, Once I understood basic theory I then designed my own circuit that after few tries worked fine. It is highly specialized for my particular product.

What is out there now in open designs I have no idea as I do electronics extremely rarely. I am developing mostly software products.

Re: Teensy 4.1 Development Board

#207

Post by [deleted] »

ohazi wrote: post #82

PSA: Networking on microcontrollers is a giant pain in the ass. Don't get me wrong, boards like this (and ESP/Realtek boards with WiFi) are great for hacky prototypes. But if you're building an embedded device that will be deployed in any sort of volume, a small application processor running Linux will make your life dramatically easier. You can keep it asleep most of the time if your power budget is tight. The hard…

[deleted]

Re: Teensy 4.1 Development Board

#208

Post by [deleted] »

ohazi wrote: post #82

PSA: Networking on microcontrollers is a giant pain in the ass. Don't get me wrong, boards like this (and ESP/Realtek boards with WiFi) are great for hacky prototypes. But if you're building an embedded device that will be deployed in any sort of volume, a small application processor running Linux will make your life dramatically easier. You can keep it asleep most of the time if your power budget is tight. The hard…

[deleted]

Re: Teensy 4.1 Development Board

#209

Post by vaxman »

ohazi wrote: post #82

PSA: Networking on microcontrollers is a giant pain in the ass. Don't get me wrong, boards like this (and ESP/Realtek boards with WiFi) are great for hacky prototypes. But if you're building an embedded device that will be deployed in any sort of volume, a small application processor running Linux will make your life dramatically easier. You can keep it asleep most of the time if your power budget is tight. The hard…

Instead of that, how about an nRF5340 running Linux Foundation's Zephyr Project OS on its application core?

Re: Teensy 4.1 Development Board

#210

Post by subhobroto »

FpUser wrote: post #206
subhobroto wrote: post #205

Earlier quoted context omitted.

> Torque control is more complex than just simply running 3ph AC motor off DC. Fair enough, I got a bit too greedy with my wants. Right now, I'm interested in running 3ph AC motor (or brushless DC motors) off DC using STM32 but having a hard time finding good open designs with affordable (DIY) feedback systems.

I can't really help you much here. When I first needed it few years ago I did google search and found bunch of articles on motor control (from Microchip I believe) that also had some designs, Once I understood basic theory I then designed my own circuit that after few tries worked fine. It is highly specialized for my particular product. What is out there now in open designs I have no idea as I do electronics extreme…

> I do electronics extremely rarely. I am developing mostly software products.

Ah got it!

I do mostly software products as well with electronics a near and dear hobby. Would love to be in touch!

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