Unbox Therapy found a use for $700 Apple wheels in a video that will bring a smile to your face.
I love the innovation and passion shown by the 3D printing and maker community during the pandemic.
The 3D Handyman shows you how to make a respirator with a Food-Safe 100% Silicone seal for about $2.75 in materials.
Be sure to read his safety information.
The 3D Handyman shares an interesting technique to address the mask shortage in light of the COVID pandemic.
However, there are safety concerns you should take seriously. Highlights added.
I’m sharing this video here to inspire folks to use the tools and expertise at their disposal to fight this awful disease.
Your safety is no joke! Read all this information!
WARNING! The activated carbon layer of the MERV 16 filter used in this video appears to contain fiberglass!
Other home air filters may also contain Fiberglass! Do not use fiberglass based materials for breathing devices! One possible test is if you can melt the filter material into a plastic blob with a standard lighter it is likely a synthetic material. If the material can not be melted, there is a high likelihood that it is fiberglass. That said, it can be very difficult to determine what these filters are made of and some may be a small percentage fiberglass. Use extreme caution when making any type of breathing device! Emailing the manufacturer may be the only way to find out what the filter is made out of.
There are lots of materials that can be loaded into this and other 3D printed mask designs. According to “tests at Missouri University and University of Virginia, scientists found that vacuum bags removed between 60 percent and 87 percent of particles.” This article also mentions “A 600 thread count pillow case captured just 22 percent of particles when doubled, but four layers captured nearly 60 percent.” This may indicate that a double layer of a MERV 12 filter (or lesser rated filters) may have much better filtration performance than just a single layer. ALSO “The problem with air filters is that they potentially could shed small fibers that would be risky to inhale. So if you want to use a filter, you need to sandwich the filter between two layers of cotton fabric.” Good advice! https://www.nytimes.com/2020/04/05/well/live/coronavirus-homemade-mask-material-DIY-face-mask-ppe.html
It appears many 3D printed masks do not have enough filter surface area and negate the manufacturer filtration ratings and can actually lead to CO2 build up in the mask cavity and in your body. This particular design appears to have enough surface area to function without these issues. However, keep this in mind and if you choose to wear a device like this
REMOVE IT if you feel light headed, dizzy, headache, confusion, etc. (Carbon Dioxide Poisoning) and NEVER wear a mask while sleeping.
- 0:00 – Intro and Basic Concept
- 3:00 – Method and Materials
- 8:38 – Design
- 14:39 – 3D Print
- 16:08 – Closer Look at the Design (Animation)
- 17:07 – Finishing and Assembly
- 20:27 – Testing and Review
- 25:02 – Cost and Conclusions
You may have seen hydraulics on cars, but Carl Bugeja shows you how to make PCBs jump.
In this video I created a new flexible PCB actuator prototype with an attempt at making it bounce
Carl Bugeja shows us how to build a very simple POV display called the FlexLED
Electronoobs shows you more or less how i2c, UART and SPI serial communications work with a few examples.
SeanHodgins shows you an interesting project designed to confuse facial recognition systems.
The Verge explores Ikea’s push into smart home technology and why that’s a big deal.
For seven years, Ikea has treated the smart home as a hobby. That’s changing now that Björn Block’s Home Smart division has been promoted to the same importance as Living Room, Bedroom, and all the other Ikea businesses that have come to define the company. Ikea faces the challenge of teaming up with Google, Amazon, Apple, and other tech giants while also battling them for primacy in the home.
Read the full feature here: http://bit.ly/38VyVH9
If you ever wanted to up your home networking game with backup to Dropbox and secure remote access from everywhere through your own VPN, all based on Docker containers, then check out what Andreas Spiess has done.
In this video, he covers:
- Install Docker with many containers like Mosquitto, Node-Red, Grafana, influxDB, Postgres, Portainer, and Adminer
- Increase the live expectancy of your SD card by disabling swapping and by installing log2ram- Automatically backup all valuable data to the cloud, in our case, to Dropbox
- Setup PiVPN to remotely and securely access our home network from anywhere in the world- Besides that, you will learn a lot of useful things about Docker containers
Links & Code:
- Software and instructions:
- Installation of PiVPN:
- SD card reader for Raspberry:
- Used cooler for RPi 4:
Seytonic explores the various tools around security and pen testing.
Fascinating look at the practical aspects of info sec.