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John Opsahl

Hard, open-ended problem? Lets solve it.

Cincinnati, Ohio
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26 Followers
23 Following
19 Projects
286 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

5.4k
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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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Lowering the cost of Refreshable Braille Cells by using Electromagnetic Cam Actuators & 3D Printing
Project Owner Contributor

Electromechanical Refreshable Braille Module

vijayVijay

8k
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41
85
Smartwatch wearable, ultra-long life measured in years, no need to recharge.
Project Owner Contributor

Smartwatch 10 Years Ultra-Long Battery Life

valentineVALENTINE

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1.3k
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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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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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24
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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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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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A DIY Probe Testing system that helps with automatic PCB in-circuit debugging.
Project Owner Contributor

CircuitScout

fangzheng-liuFangzheng Liu

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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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Small tracked robot, inspired by Pololu Zumo - but with many improvements
Project Owner Contributor

Yozh robot

alexander-kirillovAlexander Kirillov

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An animatronic robot head with an artificial tongue and nose
Project Owner Contributor

TAST-E, the robot with a sense of taste and smell

m-bindhammerM. Bindhammer

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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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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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Time-of-flight, tomography and more
Project Owner Contributor

Exploring the internals of trees with sound

hugh-brown-saint-aardvark-the-carpetedHugh Brown (Saint Aardvark the Carpeted)

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A homemade psychrometer using Raspberry Pi Pico, MCP9808, Pico-ePaper-2.13, and 74HC00.
Project Owner Contributor

DIY psychrometer

katsumiKatsumi

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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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This device attaches to the end effector of the Smart Tissue Autonomous Robot (STAR) and allows for autonomous suture tension management
Project Owner Contributor

STAR Autonomous Suture Tension Management Device

nyeli-kratzNyeli Kratz

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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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Made a vacuum pump out of PVC and a Bell Jar out of Acrylic. Then I thought what would a peep look like in space?
Project Owner Contributor

Bell Jar or Peeps in Space

david-christiansonDavid Christianson

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VALENTINE wrote 11/23/2023 at 17:54 • point

Thank you. Cheers! Valentine

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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 

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

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

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

Thanks for following :) 

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