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John Opsahl

Hard, open-ended problem? Lets solve it.

Columbia, Missouri
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25 Followers
22 Following
19 Projects
264 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

5.5k
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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

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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/

16.2k
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Very easy to repeat and inexpensive pocket-sized DIY thermal imager
Project Owner Contributor

DIY pocket thermal imager

RuslanRuslan

4.4k
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Battery-powered, ESP32-based laser XY scanner with auto-homing and wireless control
Project Owner Contributor

LaserProjector V2

StanleyProjectsStanleyProjects

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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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Squeak is a LoRaWAN GPS pet tracker with a very long battery life. It allows you to ask your pets to share their location
Project Owner Contributor

Squeak: GPS pet tracker

mihai.cuciucmihai.cuciuc

2.6k
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Low Quiescent Current, Solar Powered +30dB LoRa
Project Owner Contributor

LoRa darkStar

Capt. Flatus O'Flaherty ☠Capt. Flatus O'Flaherty ☠

1.9k
9
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Control a stepper motor over Wifi
Project Owner Contributor

Wifi controlled stepper motor

jasonwinfieldnzjasonwinfieldnz

1.7k
24
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LoRaWAN IoT system with the Arduino MKR WAN 1300, that help my community to monitor the air quality and water of our ecological area
Project Owner Contributor

Environmental Toolkit for an Ecological Area

Guillermo Perez GuillenGuillermo Perez Guillen

1.5k
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Turn any room into a home theater.
Project Owner Contributor

Projector Lift for Home Theaters

Sam BakerSam Baker

1k
3
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An old AC oven motor and a solder iron converted into a wifi enabled tiny Shawarma machine
Project Owner Contributor

Micro shawarma

Roni BandiniRoni Bandini

889
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Neural network powered robot picks ripe and undefective strawberries
Project Owner Contributor

Strawberry picking robot

madis.merilamadis.merila

868
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Add and monitor sensors in a beehive to follow bees life.
Project Owner Contributor

Beehive Monitoring and Tracking

GouttebrozeGouttebroze

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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

508
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An audiometer is a machine used for evaluating hearing acuity.
Project Owner Contributor

Arduino hearing test device - Audiometer

mircemkmircemk

407
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Compact solar-powered LoRa environmental sensor capable of sensing temperature, humidity, air pressure and VoC using BME688
Project Owner Contributor

Compact LoRa Environmental Sensor

AldwinAldwin

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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 Display

VijayVijay

237
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Tool to create PCB coils for KiCad
Project Owner Contributor

KiCAD Coil Creator

colton.baldridgecolton.baldridge

224
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Minimally printed harmonic drive for a rotary axis..
Project Owner Contributor

Yet another harmonic drive

sam sokoliksam sokolik

194
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track the seasons through tele-presence
Project Owner Contributor

Virtual Forest

Koen HufkensKoen Hufkens

View all

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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 :) 

  Are you sure? yes | no

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