Electronics Projects
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Presenting continued builds and experiment tutorials by Mike, K4ICY, also 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

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HAM RADIO
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Minty Kool Keyer

   
A 3-IC Fully-Iambic Electronic Keyer with Dot/Dash Memory and Progressive Weighting  ...and much more!
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Pleasant CPO

   
An Amplified Shaped Sine-Wave Morse Code Practice Oscillator
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Depot Cootie

   
An Easy-to-Build Single-Lever "Side Swiper" Paddle made from parts from your junk bin or local hardware store
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Curiously Narrow Filter

   
Cut out the QRM & QRN with this multiple-stage CW Audio Filter
PRACTICAL
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Li-Ion / Li-Po BMS

   
A small Battery Management System board capable of safely* providing portable power to your Arduino projects and more
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How To.. Breadboards,
Flashing LED's  &  A
555-Based Timer


   
Let's get started in electronics!  No soldering initially required
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Low-Volts Battery Cutoff Device - Intro to Comparators

   
Comparators and OP amps are essential and ubiquitous in useful electronics.  Build this low-voltage battery  saver cutoff circuit which also employs a neat relay trick.
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RF Peak Voltage Detector

   
Begin to learn the fundamental dynamics of Radio Frequency energy and try out a few enlightening experiments
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One-IC Transistor Tester

   
With just one 556 dual timer IC, never be left scratching your head over mystery transistors
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LED's - Current & Control

   
RGB LED's are awesome, but non-linear devices.  Learn how to dim to your whim
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The Wheatstone Bridge

   
Learn of electrical fundamental relationships and ID some caps
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The Cat-Bird

   
Build this classic audio oscillator circuit and start your menagerie of sound effects
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ARDUINO
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Programming the ATMega328p

   
When it's time for your Arduino project to leave the nest, follow this guide and you'll be running bare ATMega328p microcontroller IC's in your own compact projects and even ditch the bootloader.
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Programming the ATTiny85

   The small 8-pin cousin to the 328p, the ATTiny85 MCU is a very useful and compact solution.  Let's get setup to program them with a custom programming Arduino shield and even build a high-voltage fuse resetter to get use of that extra I/O pin.
[Update Planned...]

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CW Morse Decoder

   
K4ICY's custom algorithm for decoding CW Morse code that copies at 0-to-70 WPM and shows the speed and code elements all in real time!  Suitable for a 3x20 LCD text screen.  Requires initial tone detection, but great out of the box with a hand key for practice.
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Columns for Arduino

   
Play the classic SEGA(R) stacking puzzle game on any Arduino Uno or Nano!  This enjoyable, fast-paced handheld masterpiece uses 81 addressable RGB LED's, 16 7-segment display characters for info and offers stereo background music with simultaneous sound effects, as well as rumble haptics, 4 games and high score memory.  See detailed schematics...

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(c)2023 Copyright - Michael A. Maynard, a.k.a. K4ICY