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John Opsahl

Hard, open-ended problem? Lets solve it.

Columbia, Missouri
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26 Followers
23 Following
19 Projects
282 Likes
john-opsahl
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This user joined on 07/09/2019.

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a custom three axis cnc machine for carving candles.
Project Owner Contributor

CNC Candle Carver

john-opsahlJohn Opsahl

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monitor the health of trees and fruit
Project Owner Contributor

OpenDendrometer

john-opsahlJohn Opsahl

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Live bolder knowing that life does not last forever.
Project Owner Contributor

Live-A-Little

john-opsahlJohn Opsahl

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a machine to create canvas paintings of your favorite digital images
Project Owner Contributor

If ( ) Then {Paint}

john-opsahlJohn Opsahl

5.1k
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a safe, low-cost IV fluid warmer solution; for when commercially available IV fluid warmers are too expensive or cannot be sourced
Project Owner Contributor

OpenFluidWarmer

john-opsahlJohn Opsahl

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create canvas paintings from digital images using a standard three axis cnc machine
Project Owner Contributor

Project Convert To Paint

john-opsahlJohn Opsahl

View all 19 projects

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Time to get loggin'! Capture a creative new data set for this data logging contest.
Project Owner Contributor

Data Loggin' Contest

john-opsahlJohn Opsahl

Things I've Built

Automated 5 Gallon Bucket Feeder

A custom 5 gallon bucket feeder for pets. https://www.instructables.com/id/Automated-5-Gal-Bucket-Feeder/

yaxb

A joystick controlled wall plotter with record and playback capabilities.

Skittle Pixel8r

A machine that creates images using Skittles as pixels. https://www.instructables.com/id/Skittle-Pixel8r/

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The project describes the construction and operation of flip-disc displays. It also shows a simple way to control them via Arduino.
Project Owner Contributor

Flip-disc Display - How it Works & How it is Built

marcin-sajMarcin Saj

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Laser4DIY is an open-hardware machine for producing PCBs by ablating copper with a laser
Project Owner Contributor

Laser4DIY

fablab-mnchenFabLab München

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An Open source Braille embosser in the spirit of RepRap
Project Owner Contributor

BrailleRAP diy Braille embosser

stephaneStephane

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Guatemala's first satellite, Quetzal-1, operated for 211 days in-orbit in 2020. Now, we want to make its design open to everyone!
Project Owner Contributor

Open Sourcing the Design for the Quetzal-1 CubeSat

danalvarezdanalvarez

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Annually, tens of thousands of drifting FAD buoys are deployed in the ocean. Let's upgrade them for cutting-edge marine research.
Project Owner Contributor

Echo Sounder Buoys: Upcycling Playbook

brett-smithBrett Smith

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A spin coater is used to spread a thin layer of liquid on a flat surface to a very precise thickness, like photoresist on a PCB.
Project Owner Contributor

DIY Spin Coater

jeroen-delcourJeroen Delcour

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Turn any room into a home theater.
Project Owner Contributor

Projector Lift for Home Theaters

sam-bakerSam Baker

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An "auto inflation" device specifically designed for inflation style sensory/anxiety vests.
Project Owner Contributor

Auto-Inflate (AI)

tevianTevian

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Local C02 sensor and weather data scraped off interwebs predict swarming
Project Owner Contributor

Ai Honey Bee Swarm Detector / Predictor System

capt-flatus-oflahertyCapt. Flatus O'Flaherty ☠

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Lowering the cost of refreshable braille Cells down from 100$ to 10$ by using electromagnetic cam actuators
Project Owner Contributor

Electromechanical Refreshable Braille Cell

vijayVijay

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An energy-harvesting, environmental tracker that provides a long-term, sustainable solution for collecting, interpreting, and analyzing data
Project Owner Contributor

EnviroSense

trey-labakTrey Labak

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A digital pinhole camera based on the ESP32 CAM
Project Owner Contributor

Digital Pinhole Camera

dave-ehnebuskeDave Ehnebuske

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Fully magnetic equivalent of a kinetic sand art table
Project Owner Contributor

Magnetic Kinetic Art Display

moritz-v-siversMoritz v. Sivers

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Tiny houses are all the rage. Yet CAD software is expensive. So let's give some people a head start on affordable housing.
Project Owner Contributor

Tiny CAD

glgormanglgorman

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Estimates water usage based on the tap handle rotation/movement and gives real time water consumption.
Project Owner Contributor

Sensible Flow

josh-joyJosh Joy

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A laser projection system using electromagnets as "galvos" to actuate mirrors
Project Owner Contributor

GEmOPS

joshua-feistJoshua Feist

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Escape Room Puzzle: User programmable Knocking Puzzle with multiple levels. Knock patterns can be edited on SD card.
Project Owner Contributor

Programmable Knocking Puzzle

rusherrusher

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To precisely control the BO motor or to make any low cost project using PID we can consider this types of encoder integration with motors.
Project Owner Contributor

BO Motor With Encoder Gives Precise Movement

sagar-001Sagar 001

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mihai.cuciuc wrote 11/18/2022 at 05:47 • point

Hi John! Thanks for your interest in #Squeak: GPS pet tracker 

  Are you sure? yes | no

Michael Gardi wrote 06/04/2021 at 11:36 • point

Thanks for your interest in my Exploring Flip Dots project John. 

  Are you sure? yes | no

Giovanni wrote 03/21/2021 at 19:00 • point

Thanks for following :) 

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