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Chris Johnson

Electrical engineer specializing in hardware and firmware design. Branching out into Hydroponics.

Connecticut

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This user joined on 05/24/2016.

My Projects

A mist-based tower system for growing leafy green vegetables

The Little Green Tower

A Raspberry PI HAT designed to control an aeroponics tower system

SpiroBoard Aeroponics pH / EC / Motor Controller

Projects I Contribute To

Tindie

A place for Tindie sellers and the community to meet and stretch their legs

Tindie Dog Park

Projects I Like & Follow

The 2016 Hackaday Prize

Hobby brushless motors are incredibly cheap and powerful. However we need a way to make robots out of them. ODrive is that way.

ODrive - High performance motor control

Always jealous of people who could afford big Nixie Tubes, I rolled my own alternative with WS2812Bs and laser cutting!

"Lixie", an LED alternative to the Nixie Tube

The 2018 Hackaday Prize

AMS's new AS7265X 3-chip set promises a compact, 18-channel, 20 nm FWMH spectrometer for less than $25

Compact, $25 spectrometer

Hackaday Prize 2019

Very recently I was so impressed by a Japanese modern artist who draws golden fish in epoxy. I cannot draw but make circuit. Why not!

Enclose them all in super clear epoxy!

8 GHz BW, up to 1 TS/s ET Sampling

8 GHz Sampling Oscilloscope

A 1" by 1" 20msps Oscilloscope based on the PIC32MZ

1 Square Inch 20msps Oscilloscope

The 2017 Hackaday Prize

A small and inexpensive kiln for melting metals and firing clay

RepKiln

Hackaday Prize 2019

40 led flashing 3D space ship model

PCB - 3D Startrek Enterprise

Hackaday Prize 2019

A neat Tree like decoration based on the RGB LEDs.

RGB Tree

Single rotor, "human-safe", selfmade ball-drone with air vanes for position control

The Ball-Drone Project

Benjamin Prescher

Making the HX711 into a more general purpose differential data acquisition module with an interface to Raspberry Pi.

A Cheap 24-bit Differential ADC for Raspberry Pi

I2C OLED connected to an Attiny85 and a Charlie-plexed button matrix

Skeleton Attiny85 Handheld

Use a USB OTG cable with Android devices for Serial, REPL, and a basic code editor for use withCircuit Python Boards.

Android Circuit Python Editor

Simple Oven for Blowing Bubble Canopies from Acrylic Sheet.

Plastics Blow Oven

Michael Barton-Sweeney

A super simple, inexpensive method to make layer synchronized time lapse movies of 3D prints.

Layer Synchronized Time Lapse of 3D Prints

Tensegrity structures aren't just for architects.

Tensigral Lamp

16mm 5x5x5 LED Cube on a Carduino Base

Five Cubed

Simple and cheap configurable ESP32 based controller for wired sensors and relays

Chipperb

Jason K Jason K

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Bits

Kris Winer wrote 10/16/2018 at 16:22

Thanks for following my Compact, $25 spectrometer project!

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