Welcome to the Arduino Playground

Discussion in 'Arduino Playground' started by AA7BQ, Mar 25, 2021.

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  1. W0RIO

    W0RIO Ham Member QRZ Page

    This is a great idea for a forum, the Arduino is a really useful platform for many small ham radio projects.

    I've been using the Arduino for years, the platform has its quirks, but it's a lot easier than
    programming in assembly language and much more versatile with faster execution than
    the older platforms that use embedded BASIC interpreters.

    I've built quite a few ham projects with the Arduino including a DDS VFO, a 2716 EPROM programmer
    and a 28Mhz beacon keyer shown below:

    00002sm.jpg

    Here's a link to my beacon project:
    http://www.solorb.com/elect/hamcirc/28mbeacon1/index.html

    The 2716 EPROM programmer I built (still undocumented) required some serious trickery to implement
    since the Arduino Uno has less than 2K of spare RAM. I had to implement an external address/data bus
    using three 74HC595 shift register/latch chips and a 74HC165 shift register to drive an external RAM and the EPROM.
    An Arduino Mega might have been a better choice for that project, 20-20 hind sight.

    A useful Arduino trick is to develop the code on the Arduino board, then lift the socketed CPU out
    and stuff it in a stand-alone board. Here's a low frequency oscillator (LFO) project I built using
    that method: http://www.solorb.com/elect/musiccirc/ArduinoLFO2/

    There are tons of inexpensive shield plug-in boards for the Arduino, Adafruit and SparkFun
    are a good place to find them as well as EBay and Amazon.
    https://www.adafruit.com/
    https://www.sparkfun.com/

    There are way more Arduino toys available than I'll ever have time to play with, but that's not a bad thing.
     
    VE3CGA likes this.

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