johnpark
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johnpark
A breadboard setup with a microcontroller and four buttons is connected to a linear actuator via jumper wires. The actuator is mounted on a metal rail, with wires linking it to the breadboard.
Flying Faders
By John Park
Make those faders fly with a motorized slide pot! Use it for audio mixing, MIDI synths, lighting control, and interactive robotics. Harness the slide pot, motor, and capacitive touch. CircuitPython, Arduino, and MakeCode are covered.
A cassette labeled "WALKMELLOTRON" is in a portable player connected to a keyboard. A hand is pressing a key on the keyboard.
Walkmellotron: Cassette Player Mods
By John Park
Build two different DIY solutions to the age old problem of how to speed control you Walkman with tape loops like an ersatz Mellotron.
An 8x8 grid of multicolored LED buttons is held above a modular synthesizer interface with patch cables. The interface shows MIDI sequencer modules with various controls and settings.
NeoTrellis MIDI Feedback Controller
By John Park
Eliminate the paradox of dual interfaces with this project. By communicating via MIDI messages in two directions, your software sequencer or clip launcher will keep your NeoPixels lit even when you press virtual buttons!
A vintage Sony CRT displays a colorful digital clock with a retro background using a ESP32 QT Py Composite Video Injector. Close-ups show a rotary encoder with yellow wiring connected to the TV's video input.
Video Nub Shank: ESP32 QT Py Composite Video Injector
By John Park
Make a stylish vaporwave clock or NTSC SPMTE color bar test pattern generator using the QT Py ESP32 Pico.
A red rotating beacon light is mounted on a black base with a small Feather ESP32-S2 TFT electronic board and a connected power cable.
RPi Stock Alert Alarm
By John Park
This project uses a Feather ESP32-S2 TFT to watch the rpilocator.com Twitter feed -- as soon as RPi boards are in stock at Adafruit you'll get a loud and flashing alert!
A small ESP-32 S2 TFT Feather device with an OLED screen displays ESPHole Ad Blocker network connection details, including IP address and domain check count. A power cable is connected on the left side.
ESPHole Ad Blocker
By John Park
Run a complete ad blocking solution on an ESP-32 S2 TFT Feather!
CircuitPython Tricks logo features stylized text with a snake motif and the smiling face of Tod Kurt. The background is pink with black accents.
Todbot's CircuitPython Tricks
By John Park
Friend-of-the-Fruit Tod Kurt has created a terrific resource for copy/paste-able CircuitPython code. Here it is!
A breadboard with a row of 8 colored buttons connected to a microcontroller and power supply. Wires link components for circuit operation.
Breakbeat Breadboard
By John Park
Beat matched audio files play in sync with the audio mixer used to mute and un-mute any and all sounds, like a DJ killswitch. Plugs into any audio amplifier, or powered speaker set for maximum breakbeat oomph.
A pocket-sized octagonal box contains a circuit board, small OLED screen, and toggle switch. The screen displays status information for a web server. Nearby, a mobile phone displays a web-based word-guessing game.
Personal and Portable ESP32-S2 Web Server
By John Park
Build a self-contained web server on a Feather TFT ESP32-S2 -- it can serve up a web page over a local network or even as an ad-hoc WiFi access point/server!
A beige touch tone-style telephone with a coiled cord rests on a wooden surface. The phone features a keypad with numbers and symbols.
Touch Tone Phone Dial-a-Song
By John Park
This project uses a Feather and small amp to turn a Western Electric DTMF phone into a jukebox. Punch a number into the keypad and hear a song! Or, dial a non-working number and hear the dreaded "that number is not in service" message.
A compact PB Gherkin 30% mechanical keyboard with a QWERTY layout, featuring dark keycaps with white lettering and symbols on a black surface.
PB Gherkin 30% keyboard with KMK, CircuitPython, & KB2040
By Eva Herrada
In this guide, you'll learn how to set up your PB Gherkin 30% keyboard to use KMK firmware. You'll use the PB Gherkin, designed by 40percent.club, and the new Adafruit KB2040, to build a keyboard that you'll put KMK firmware on and learn how to remap it and create your own configuration.
A hand dials a rotary phone, while an iPad displays a passcode screen. The setup demonstrates interfacing old and new technology.
Rotary Phone Dial Keypad
By John Park
The legendary Western Electric model 500 phone is as solid and satisfying a device as has ever been made by humans. Now, you can use the rotary dial to input numbers to your computer over USB HID and keep living like it's 1965!
Arcade-style controller with a joystick and 13 red arcade buttons on a white panel, featuring three illuminated white buttons on the side. Modular synthesizer equipment is visible in the background.
Arcade Synth Controller
By John Park
Build your own arpeggiator synthesizer/MIDI controller in the form of a fight stick/piano keyboard mashup! You'll use LED Arcade 1x4 boards, MIDI FeatherWing, Feather M4 Express, and lots of shiny buttons to build this retro-style synth.
Custom MIDI controller with four black keys and four sliders on a semi translucent case. Red LED lights illuminate the sliders.
Neocontroller Color Grading Input Box
By John Park
Build a four slider + four keyswitch input box to control Lightroom (or any MIDI or USB HID application). Reconfigurable with CircuitPython running on a Feather RP2040
Wearable Pip-Boy 2040 electronic device on a wrist with a screen displaying a pixel art Fallout-inspired Pip-Boy character. Features include buttons, a joystick, and a circuit board.
Pip-Boy 2040 Wrist-Mounted Prop
By John Park
Make this cool prop wrist-computer for cosplay or general stylishness all the time! Swap graphics with the buttons, move the cursor with the joystick, look rad!
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