The Curious Engineer

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Electronics and microcontroller projects

Embedded / microcontrollersElectronics

’15’20’25
Posts
216 from 3 Apr 2014 to 5 Sep 2026
Posting
monthly (13 in the last year)
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personal blog
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2026 11

  1. Digital Signal Generator PCB
  2. IR NeoPixel Controller Dongle
  3. Digital Signal Generator
  4. One-Input Numeric Keypad
  5. IR NeoPixel Controller
  6. A Single-Line HSV Function
  7. TinyCard Game Maker 2
  8. Universal TFT Display Backpack 2
  9. Two TFT Graphics Libraries
  10. ESP32-P4 Feather Board
  11. Light Lab [Updated]

2025 12

  1. USB-C Power Delivery Dongle
  2. Show
  3. Tiny Continuity Tester
  4. A NeoPixel Driver using AVR Hardware [3]
  5. A NeoPixel Driver using AVR Hardware [2]
  6. A NeoPixel Driver using AVR Hardware [1]
  7. Walkie-Textie Wireless Communicator
  8. AVR128DA32 Feather Board
  9. LED Probe
  10. Dot-Matrix Timescale Clock
  11. TinyCard Game Maker
  12. Prime Time

2024 11

  1. 2-bit Magnitude Comparator
  2. Scrolling Text Display PCB
  3. Smooth Big Text with Hints
  4. Scrolling Text Display
  5. Sound Lab - Example Sounds
  6. Sound Lab - a Simple Analogue Synthesiser
  7. Logic Lab 1G
  8. Secret Maze 2
  9. Building Gates with the AVR Event System
  10. RA4M1 Nano Board
  11. Silver Dollar Game: How to Win

2023 10

  1. Silver Dollar Game
  2. Lisp Badge LE
  3. CAN Bus Monitor
  4. Logic Lab Problem Answers
  5. Logic Lab
  6. I2S Speaker for QT Py
  7. Adjustable Load
  8. Harder Number Maze Game
  9. Power Deliverer with Current Monitor
  10. Tiny UPDI-HV Programmer

2022 24

  1. Number Maze Game
  2. Minimal GIF Decoder
  3. Lisp Star
  4. Graphical Analogue Clock
  5. The ATtiny 2-Series
  6. Power Deliverer
  7. Drawing Filled Quadrilaterals and Triangles
  8. Reading from a TFT Display
  9. I2C SD-Card Module PCB
  10. I2C SD-Card Module
  11. Monochrome Low-Power Display Library
  12. Three-Channel Chart Plotter
  13. Adding File Storage to an Arduino
  14. Universal TFT Display Backpack
  15. Tiny TFT Graphics Library 2
  16. On Bytes and Pins
  17. Tiny I2C Routines for all AVR Microcontrollers
  18. Minimal RP2040 Board
  19. Printing to a Serial LED Display
  20. 16 LEDs Kishi Puzzle Solution
  21. Twinkling Pendant
  22. Morse Code Message Pendant
  23. Controlling RGB LED Strips with a Single Function
  24. 16 LEDs Solution and a New Puzzle

2021 13

  1. Using a Timer on the Arduino Uno or Arduino Zero
  2. AM Morse-Code Transmitter
  3. 16 LEDs Puzzle
  4. Low-Power LCD Clock
  5. Measuring Your Own Supply Voltage
  6. 100MHz Frequency Meter
  7. Pocket Op Amp Lab PCB
  8. Frequency Divider Using CCL
  9. Pocket Op Amp Lab Cookbook
  10. I2C Detective
  11. Pocket Op Amp Lab
  12. Five LEDs Puzzle Solution
  13. Five LEDs Puzzle PCB

2020 14

  1. Compact TFT Graphics Library
  2. Five LEDs Puzzle
  3. Frequency Probe
  4. Combination Lock Using CCL
  5. Diffusion Clock
  6. Smooth Big Text
  7. Simple Sprite Routines for the Wio Terminal
  8. Saving Screenshots from a TFT Display
  9. Simple Sprite Routines for the PyGamer/PyBadge
  10. Reading the PyBadge Display
  11. Minimal ATmega4809 on a Breadboard
  12. Big Time
  13. Four Sample Player
  14. Mega Tiny Time Watch [Updated]

2019 22

  1. Eight-Character Alphanumeric Display
  2. Festive Lights Programming Challenge
  3. UPDI Programmer Stick
  4. New ATtiny Low Power
  5. Nano Current Meter
  6. ATtiny Running Lisp
  7. Minimal I2C for the New AVR Microcontrollers
  8. Getting Started with the New ATtiny Chips
  9. Visible Lisp Computer
  10. Simple DataFlash Board
  11. Magic 3D Clock
  12. Tiny TFT Graphics Library
  13. Illuminated Button Matrix
  14. Two-Digit Thermometer
  15. Minimal ATSAMD21 Computer 2
  16. Minimal ATSAMD21 Computer
  17. Tiny Thermocouple Thermometer
  18. Twelve PWM Outputs from an ATtiny85
  19. Tiny Function Generator PCB
  20. ATtiny10 Thermometer PCB
  21. ATtiny10 Thermometer
  22. Lisp Badge [Updated]

2018 26

  1. ATtiny85 Weather Station [Updated]
  2. Widget Dashboard
  3. Tiny MIDI Player
  4. Colour Graphics Library
  5. I2C GPS Module PCB
  6. Tiny Terminal 2
  7. Tiny Function Plotter
  8. I2C GPS Module
  9. Simple LCD Character Display
  10. Alcohol Unit Counter
  11. Tiny Machine-Code Monitor
  12. One Input 20-key Keypad Interface
  13. Programmable Signal Generator
  14. Minimal Tiny I2C Routines
  15. ATtiny85 20MHz Internal Clock
  16. ATtiny10 POV Pendant
  17. IR Remote Wand
  18. IR Remote Control Detective [Updated]
  19. Harmonic Function Generator
  20. Tiny Graphics Library
  21. Secret Maze PCB
  22. Tiny Function Generator Sine Wave
  23. Tiny Function Generator
  24. Secret Maze
  25. Playing Notes on the ATtiny85
  26. Tiny Colour Watch

2017 9

  1. Continuity Tester
  2. Programming the ATtiny10 [Updated]
  3. Proto Power Supply
  4. Using an ATmega328 without a crystal
  5. Bounce-Free Rotary Encoder
  6. Four-Channel Thermometer
  7. Flexible GPS Parser
  8. Tiny Face Watch
  9. Driving Four RGB LEDs from an ATtiny85

2014 1

  1. ATtiny Low Power

Undated 63

  1. Big Text for Little Display
  2. ATtiny85 Graphics Display
  3. Tiny Time 2 Watch
  4. 10 or 12-bit DAC from the ATtiny85
  5. Simple 1-Wire Interface
  6. Audio Pitch Shifter
  7. Tiny Lisp Computer 2 PCB
  8. GameBone Simple Electronic Game
  9. Tiny Time Watch
  10. Tiny Lisp Computer 2
  11. Tiny Lisp Computer
  12. Text Display for the Arduino Uno
  13. Simple PS/2 Keyboard Interface
  14. Making Your Own I2C Peripherals
  15. Using the ATmega1284 with the Arduino IDE
  16. Digital Clock Using Lisp
  17. Making millis() tell the time
  18. A Lightweight Alternative to tone
  19. Adjustable Load
  20. Programming ATtinys with Arduino 1.6.8 [Updated]
  21. Digital Music Box [Updated]
  22. Using the Arduino IDE Without Cores
  23. Flashing Thermometer
  24. Portable Lab Power Supply
  25. ATtiny85 Sound Level Meter
  26. ATtiny85 Bargraph Voltmeter
  27. TinyNav Simple GPS Navigator [Updated]
  28. Dot Matrix Clock
  29. Simple Rotary Encoder Interface [Updated]
  30. Driving LED Displays with Fewer I/O Lines
  31. Infrared Controlled Buggy
  32. Powering Projects from a 1.5V Battery
  33. IR Remote Control Switch
  34. Odometer/Speedometer Pendant [Updated]
  35. Push-Button On/Off Switches
  36. Simple ATtiny USI UART 2
  37. Sony NEX/Alpha Remote Control
  38. IR Remote Control Receiver
  39. Bulls & Cows Game 2
  40. IR Remote Control Tool (NEC)
  41. IR Remote Control Tool
  42. Bulls and Cows Game
  43. Tiny Terminal
  44. Choosing a Friendly AVR Chip
  45. Simple GPS Odometer
  46. Simple Compass Display
  47. Tiny GPS Speedometer [Updated]
  48. Minimal GPS Parser [Updated]
  49. Simple ATtiny USI UART
  50. Timescale Clock
  51. Tiny Synth
  52. Waveform Generation using an ATtiny85
  53. Audio Sample Player
  54. ATtiny85 Analogue Clock
  55. Radio Time Code Clock
  56. Four PWM Outputs from the ATtiny85
  57. ATtiny-Based Beginner's Kit
  58. MINIL Machine-Code Monitor
  59. One Input Keypad Interface
  60. Conundrometer Game
  61. Getting Extra Pins on ATtiny
  62. Simple Tones for ATtiny
  63. Digital Signal Generator PCB Program