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If I wanted better fuel economy, I should just get a Prius. Sound familiar?
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It wasn't a general suggestion for everyone, it was for you. You already spent $10 on a button, and were considering a TFT upgrade, so 20x4 wouldn't be out of line. Anyhow, as I mentioned, the block character graphing is still passable on 2x16's too. The same number of bone-stock MPGuino owners will upgrade their screens, as will rewire their buttons -- not a damn one. But whatever, it's out there.
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an AtMega328 for $2.88 plus shipping.
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Wow, I had no idea those were available. Now if only I can find a DIP-to-TQFP adapter socket, desolder my 168 and mount the new one, I'll be in business.
Believe me, I knew from the start that the easy way out was to just buy a new 328 board for $25, but sticking with the 168 forced me to streamline the code (base functionality < 8k) and was well worth the learning experience. No regrets. And if I can't squeeze rudimentary OBD2 op's into my remaining 1k, I'll have no choice but to use one of my 328s, also without regret.
I do wish you didn't take every comment as a blood-libel, personal insult. It is tiresome, and leaves only one way to avoid it. A general hostility to ideas was on this project long before, too. Ever wonder why 0.86 never made it to 0.87? It could also be, that no one drives pre-96 cars anymore, but in this economy, that's doubtful.