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



Ham Radio:


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!




Fun:



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 fast-paced and very enjoyable!
                         See my journal with detailed description, links to parts and download the sketch and schematic.
                         Project is ongoing with further development using custom SMD PCB's, 3D printing and more.
                         - - - Recommended for more advanced Arduino experimenters - - -



Practical:


PCB-Based Projects Li-Ion / Li-Po Battery Management Board

     A small BMS capable of safely* providing portable power to your Arduino projects and more.

     SMD/SMT Manufactured PCB (36mm x 65mm), Estimated prototyping cost: $25* USD ea.
     Input: 1S/xP Lithium-Ion or Polymer batter(ies) @ 3.7v nom. (1300mWh min. ea.)  /  5V / 3A Outlet Charging Source
     Output: 2V (2A) - 15V (reduced A)



Educational:


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

 

(c)2021 Copyright - Michael A. Maynard, a.k.a. K4ICY