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Arduino Uno R4

blog.arduino.cc

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101–110 of 136 posts

Re: Arduino Uno R4

#101

Post by far_focus »

I received an Arduino Uno starter kit from my grandfather many many years ago on my birthday; it got me started coding before I even realized I was coding. I don't even think I was a teenager? Only years later when I took my first programming course at college, did I realize :)

Glad to see the original uno hardware updated -- I distinctly remember running out of flash memory, because I copied and pasted the blinking LED code hundreds and hundreds of times. I didn't know about for or while loops !

Re: Arduino Uno R4

#102

Post by nyanpasu64 »

dale_glass wrote: post #5

A nice improvement, but maybe too little too late? I mean, what's the point? An ESP32 has 320K SRAM, 448K Flash and a 240 MHz dual core CPU. And it costs peanuts. That's the competition to beat, and this doesn't reach it, even though the ESP32 came out in 2016. The Arduino has been resting on its laurels for too long, I'm afraid. There's long been things out there much faster and cheaper, and with wifi out there for…

Selling Arduinos for over $20 is utterly ridiculous when you cam get a Pi Pico for $4, ESP8266 for under $10, or an Arduino clone on AliExpress for under $4.

Re: Arduino Uno R4

#103

Post by ur-whale »

The specs are rather underwhelming in 2023.

While the Uno was a revolution in many regards, this very much feels like a weak attempt at catching up to an ESP32 board.

Not sure why I would ever want to buy one of these given what already exists out there.

Re: Arduino Uno R4

#104

Post by taylorportman »

dragontamer wrote: post #88
kayson wrote: post #81

Earlier quoted context omitted.

There are bajillions of mosfets; you can certainly find another one that works even if it's a tiny bit more expensive.

Sure. So name one, that's cheap, readily available from many manufacturers, through hole, with 100mA+ or so Ids, low enough capacitance to be used with a microcontroller like ESP32. Most of the good MOSFETs I'm aware of are SMT only, which is not beginner friendly. 2N7000 through hole is extremely available damn near everywhere. All companies have a clone of the venerated, classic MOSFET. EDIT: Its also been used in…

There is an IRL series. I just got some IRL540N's https://learnarduinonow.com/2017/06/02/logic-level-mosfets-i... But I got arduinos to go with them because I doubt they will work directly from an esp. I think the big reason arduino can get away with charging so much is they must have some sort of educational institution market buying their products. The software and community support that comes with them is nice to have.

Re: Arduino Uno R4

#105

Post by rowanG077 »

dale_glass wrote: post #5

A nice improvement, but maybe too little too late? I mean, what's the point? An ESP32 has 320K SRAM, 448K Flash and a 240 MHz dual core CPU. And it costs peanuts. That's the competition to beat, and this doesn't reach it, even though the ESP32 came out in 2016. The Arduino has been resting on its laurels for too long, I'm afraid. There's long been things out there much faster and cheaper, and with wifi out there for…

A big disadvantage is that the esp32 has a closed source core.

Re: Arduino Uno R4

#106

Post by [deleted] »

taylorportman wrote: post #104
dragontamer wrote: post #88

Earlier quoted context omitted.

Sure. So name one, that's cheap, readily available from many manufacturers, through hole, with 100mA+ or so Ids, low enough capacitance to be used with a microcontroller like ESP32. Most of the good MOSFETs I'm aware of are SMT only, which is not beginner friendly. 2N7000 through hole is extremely available damn near everywhere. All companies have a clone of the venerated, classic MOSFET. EDIT: Its also been used in…

There is an IRL series. I just got some IRL540N's https://learnarduinonow.com/2017/06/02/logic-level-mosfets-i... But I got arduinos to go with them because I doubt they will work directly from an esp. I think the big reason arduino can get away with charging so much is they must have some sort of educational institution market buying their products. The software and community support that comes with them is nice to…

[deleted]

Re: Arduino Uno R4

#107

Post by slim »

wombat_trouble wrote: post #76
dale_glass wrote: post #5

A nice improvement, but maybe too little too late? I mean, what's the point? An ESP32 has 320K SRAM, 448K Flash and a 240 MHz dual core CPU. And it costs peanuts. That's the competition to beat, and this doesn't reach it, even though the ESP32 came out in 2016. The Arduino has been resting on its laurels for too long, I'm afraid. There's long been things out there much faster and cheaper, and with wifi out there for…

Arduino never made sense as far as technical specs go. You could always buy more capable and compatible AVR microcontrollers for one tenth the price. In the past decade, the disparity has gotten more dramatic as 8-bit chips have gotten even cheaper and even more capable. Arduino owed its success solely to building a healthy maker ecosystem of folks who simply defaulted to it as a platform, published tutorials, and pr…

  Raspberry Pi had the same thing
Maybe we have an answer here. Raspberry PI ventured in Arduino's market with Pico. Maybe Arduino is reacting to that?

Re: Arduino Uno R4

#108

Post by cellularmitosis »

RobotToaster wrote: post #98
dale_glass wrote: post #5

A nice improvement, but maybe too little too late? I mean, what's the point? An ESP32 has 320K SRAM, 448K Flash and a 240 MHz dual core CPU. And it costs peanuts. That's the competition to beat, and this doesn't reach it, even though the ESP32 came out in 2016. The Arduino has been resting on its laurels for too long, I'm afraid. There's long been things out there much faster and cheaper, and with wifi out there for…

This isn't even the fastest arduino, in 2014 there was the edison version that had a dual core 400mhz x86.

Probably the fastest 5V IO Arduino.

Re: Arduino Uno R4

#109

Post by cellularmitosis »

kayson wrote: post #81
dragontamer wrote: post #15

Earlier quoted context omitted.

But an ESP32 can't turn on an 2N7000 MOSFET. 2N7000 is a 5V MOSFET, and is the cheapest one to boot, and one of the easiest to use.

There are bajillions of mosfets; you can certainly find another one that works even if it's a tiny bit more expensive.

But could a hobbyist who is following one of the bazillion tutorials which calls for a 2N7000 or other non-logic-level mosfet? Does that hobbyist even know what a threshold voltage is? These are barriers to entry which are removed by 5V IO.

While I love digikey’s parametric search, I’ve gotten feedback from more than one budding hack after that it is “too complicated and confusing”

Re: Arduino Uno R4

#110

Post by swimfar »

zamadatix wrote: post #49
DeathArrow wrote: post #41

Earlier quoted context omitted.

I think Arduino and ESP32 have different goals. One is more of an educational tool targeting children and adults to automate simple stuff and learning to program microcontrollers in a simplified way and the other is focusing on more industrial solutions where performance, price and flexibility matters. So I am not sure they are competitors. Like Intel and Raspberry Pi aren't competitors as they address very different…

Addressing specific markets only works if you do it uniquely or better. The simplified Arduino tooling works on the ESP32, which is also the cheaper and better option.

But that Arduino tooling and all the libraries, tutorials, etc. wouldn't exist if nobody had bought Arduinos. If I'm just buying a few boards for personal projects I like to support companies that provide more than just hardware to the maker community.
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