Microcontroller cheat sheet


[Alex] put together this handy cheat sheet to make pinout lookups much quicker. It covers the most common chips from the AVR line, ISP headers, and FTDI cables.


  1. hurrrrr says:

    Great Hack.

  2. steve says:

    I have these all hand drawn out on graph paper taped up to the walls of my work area. that way when I need a pinout I just look at the wall. while this isn’t a hack it is quite useful to those who do the hacking so I’m all for it. why stop here though how about adding pinouts for other common devices like 741 opamps, 555 timers, 12ax7 triode tubes, 78 and 79 series voltage regulators, 3904 and 3906 transistors, common pc ports and anything else you might use. I find myself constantly reffering to pinouts while I work. I will gladly print this out and hang it up in my shop.

  3. error404 says:

    Great to see the ISP header pinout alone. It’s always a 15 minute search for me to find it whenever I’m developing a new board. Buried in the AVRISP manual somewhere or something…


  4. tombola says:

    just open eagle and you have all this and much more in the libraries

  5. Spork says:

    Not a hack, but very nice for electronic newbies.

  6. nubie says:


    (just need to get access to a printer.)

    This will help nuts like me who hand-wire every project.

  7. Cris Abbott says:


    while you could do that, alot of us probably start designing a circuit on graph paper, without a computer, as it can be sometimes quicker. this is definately a nice bit of information to have around. and i also agree with steve on the other common parts that would be nice to have listed. i’m bookmarking this one to print out.

  8. Mark Carlson says:

    Huge old pinout database, The Giant Internet IC Masturbator:


  9. Mark Carlson says:

    also, the logic pocket data book from texas instruments can be handy:


    i think you’d need a pretty big pocket to hold 400 sheets of paper, though

  10. Taylor says:

    This is perfect! Exactly what I was just about to go looking for, no kidding! I think hackaday has predictive mind-reading capabilities lol.

  11. Hitek146 says:

    ^^^lol… Pinout for 78xx and 79xx series regulators… May as well add pinouts for discrete resistors… :)

  12. steve says:

    laugh if you want. I’ve been doing electronics for 16 years. I make my living at this. while most of the time I can remember my most often used pinouts, but since I usualy end up doing most of my circuit boards by hand (I have and can use autocad, but most of my work is one off prototypes and time is always short so I end up making 80% of my circuit boards with a sharpie and some acid. there simply isn’t enough time to do the design on a computer and send it out to get made.) combine that with the fact that I usualy end up doing this stuff at 4:00am and you can see why I like to have a reference to double check myself before I do anything permanent. a simple mistake like that could easily cost me a full days work, and that delay could cost me a customer and all his word of mouth referals: potentialy thousands of dollars of buisness. I have a kid to feed; I can’t afford to make those mistakes. having my pinouts all up on the wall not only avoids these types of problems it makes my workshop look awesome.

  13. ray says:

    i like the way you think steve :D

  14. itomato says:

    Chicago, FTW

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