Electronics Projects
Including selected articles as presented in The Printed Circuit, newsletter of the Tallahassee Amateur Radio Society (TARS)'s monthly section:
Weekend Radio  Electronics Projects and Tutorials By Mike Maynard, K4ICY

Click Here for an index of Published Electronics Projects

The Minty Kool Keyer - A 3-IC Fully-Iambic Electronic Keyer with Dot/Dash Memory and Progressive Weighting

The Pleasant Code Practice Oscillator - An Amplified Shaped Sine-Wave Oscillator

The Depot Cootie - An Easy-to-Build Single-Lever Paddle

K4ICY's Arduino Projects  K4ICY's CW Morse Decoder for Arduino

                         YOU can make a simple CW Decoder that does 0-to-70 WPM in nothing flat!  Uses my own custom algorithm...
                         Includes a 3 x 20 character text field, WPM indicator and a nifty thing that shows the code elements in real time!
                         Excellent for high-speed electronic-produced code, but decent for hand-sent code provided the input signal is clean.
                         [This is still a WIP but you can try it out!]

A Curiously Narrow CW Audio Filter -   Cut out the QRM/QRN!

K4ICY's Arduino Projects  Columns Handheld Game for Arduino

                         Based on the 1989 Sega(R) arcade and console game inspired by Tetris, at the least, this portable version
                         uses a matrix of addressable LEDs, 2 LED numerical displays, a few buttons
                         and just one basic Arduino Nano or Uno.
                         Many other 'bells and whistles' are included such as stereo music, sound effects and haptic rumbling,
                         and the colorful game play is very enjoyable!
                         See my journal with detailed description, links to parts and download the sketch and schematic.
                         - - - Recommended for more advanced Arduino experimenters - - -

Breadboards, Dual Flashing LEDS & A 555-Based Timer with Relay

The Battery Saver - Low Voltage Cutoff Device - Introduction to Comparators

RF Peak Voltage Detector Circuit

One I.C. Transistor Tester

Dimming and Current Control for LEDs, Full-Color LEDs

The Wheatstone Bridge

An Audio Oscillator Circuit - The Cat-Bird

IR Quadrature Incremental Encoder for Arcade Joysticks

    WIP - Here, I tried to add rotation to standard arcade joysticks for games requiring this feature.  Shown here is only a (functionally) working prototype, but a later Arduino microcontroller version proved the paticular IR receiver SOC's used to be a poor choice due some built-in normalizing (AVC) feature.  You can at least see my analog/passive circuit attempt.  With the right kind of detectors the circuit will function well.


(c)2020 Copyright - Michael A. Maynard, a.k.a. K4ICY