Just need to know if the hardware I am about to buy will do what I need it to do. I don't need to know about sketches yet. Please have patience with the newbie. I think I have included the necessary info on the attached diagram. [Interfacing Arduino] Thanks in advance Barry

[image] barryfields: Looks like the choice is between the UNO R3 SMD $26 or the MEGA 2560 $48. Not the only choices. And BTW, an SMD Uno isn't what an Uno is supposed to be. You might as well buy the original plain Nano. The Uno R3 has the ATmega chip in a socket for reason, it can be remove…

What I hear you saying is the UNO SMD may not be the ultimate in reliability. Right now I am presuming the MEGA 2560 is a rational choice for my project. Given that, I will redraw my proposed hardware outline. Price to me is not unimportant, but I do not want any spurious issues for the sake of $…

[image] barryfields: What I hear you saying is the UNO SMD may not be the ultimate in reliability I think both options are reliable given a reliable source. The version with the socket mounted DIP chip gives you an option to use your board as a programmer if you wanted to move the chip to a D…

[image] barryfields: What I hear you saying is the UNO SMD may not be the ultimate in reliability. Right now I am presuming the MEGA 2560 is a rational choice for my project. No, the Uno should have the socket to be more flexible. With the socket it can use not just the ATmega328 but the 16…

[image] GoForSmoke: Arduino does not make or sell the Mega2560 any more. Are you sure about that ? Arduino Mega 2560 Rev3 — Arduino Official Store

[image] bobcousins: Are you sure about that ? Arduino Mega 2560 Rev3 — Arduino Official Store They're making them again then! At least I seem to recall when they didn't, years ago. Rugged Circuits makes an external memory expansion that plugs into the back header. I have one. It lets the int…

As you first mentioned the MEGA 2560 back in post 16, I must conclude that you do not disagree with my choice. I do realize that you might do things differently.

I see no reason to use a dumptruck to buy a bag or two of groceries either. If you're going to make end-use-products then having a small chip board, like a Nano, to program bare chips. It's very likely that a Nano/Uno/Mini/ATmega328 can handle what you want to do. If not, adding standalone AVR's (…

Wow, that is a new level of rude. I have done my best to treat you with respect. I will continue to do so. This old cripple is quite good at bread boarding most of which are still operating continuously for 4years. I do not use oxy acetylene for soldering. I am not trying to develop an end use produ…

[image] barryfields: I will still value your input if mutual respect is the rule. When I ask outright questions in order to fit advice to someone, I get a bit irked at being blown off. What can I say? I did spend time posting about making and using standalone AVR-duinos in conjunction with t…

First post - hardware question

Projects General Guidance

barryfields February 19, 2025, 4:32pm 105

I have done my best to incorporate the advice you all have given me. I have attached my updated plan for your perusal. I look forward to your feedback.

I2C pullup resistors

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First post - hardware question

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