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Projects John Opsahl likes and follows

6.4k
1.3k
57
An Open source Braille embosser in the spirit of RepRap
Project Owner Contributor

BrailleRAP DIY Braille embosser

stephaneStephane

1.1k
363
13
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

36.5k
218
244
Lowering the cost of Refreshable Braille Cells by using Electromagnetic Cam Actuators & 3D Printing
Project Owner Contributor

Electromechanical Refreshable Braille Module

vijayVijay

8k
79
85
Smartwatch wearable, ultra-long life measured in years, no need to recharge.
Project Owner Contributor

Smartwatch 10 Years Ultra-Long Battery Life

valentineVALENTINE

2.9k
40
38
A DIY Probe Testing system that helps with automatic PCB in-circuit debugging.
Project Owner Contributor

CircuitScout

fangzheng-liuFangzheng Liu

5.2k
36
34
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

2.9k
28
23
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

4.4k
24
23
Laser4DIY is an open-hardware machine for producing PCBs by ablating copper with a laser
Project Owner Contributor

Laser4DIY

fablab-mnchenFabLab München

1.5k
24
25
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

1.9k
17
17
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 ☠

1.2k
15
12
A digital pinhole camera based on the ESP32 CAM
Project Owner Contributor

Digital Pinhole Camera

dave-ehnebuskeDave Ehnebuske

1.6k
9
14
An "auto inflation" device specifically designed for inflation style sensory/anxiety vests.
Project Owner Contributor

Auto-Inflate (AI)

tevianTevian

1.6k
9
20
Small tracked robot, inspired by Pololu Zumo - but with many improvements
Project Owner Contributor

Yozh robot

alexander-kirillovAlexander Kirillov

6
4
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

390
3
3
A homemade psychrometer using Raspberry Pi Pico, MCP9808, Pico-ePaper-2.13, and 74HC00.
Project Owner Contributor

DIY psychrometer

katsumiKatsumi

479
2
3
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)

160
2
4
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

104
2
2
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

115
2
2
A laser projection system using electromagnets as "galvos" to actuate mirrors
Project Owner Contributor

GEmOPS

joshua-feistJoshua Feist

273
2
2
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

66
1
1
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

Going up?

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