Grad Student Rigs Cheap Alternative to Expensive Air Purifiers in China

NewImage

While living in Beijing, China, University of Virginia graduate student Thomas Talhelm created a cheap alternative to the expensive air purifiers being used in China to combat the air pollution. via Science Blog:

He also became one of the millions to suffer from the sometimes-lethal air pollution, the result of massive coal burning during a cold snap and China’s growing love affair with motor vehicles. Beijing alone has more than 1 million cars on the road.

“I had to use a mask when I biked,” Talhelm said during a recent phone call from Beijing, where he has returned to do follow-up work on his rice theory paper. “I felt like I had asthma and it hurt to breathe deeply.”

Those who could afford it were resorting to an expensive solution: air filters costing up to $1,000. Because he was only going to be in Beijing for eight months, Talhelm was unwilling to lay out that kind of cash. “I thought it was pretty ridiculous. And on top of the sticker price, they really stick you for the replacement filters,” Talhelm said. “I could have afforded it, but if you are gouging me, it’s unfair. And there are plenty of people who cannot afford it.”

His solution was remarkably simple and really cheap. He strapped a HEPA filter to a fan and quickly began to enjoy clean air. A particle counter he purchased confirmed the filter was effective.

Read more.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 30,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — Savannah tells the story of the supply chain crisis in the U.S.

Wearables — Feathers from leather

Electronics — Get Oriented!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Events, Projects, and much more! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — No-Code IoT with WipperSnapper, Beaming Internet across the Congo, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week 10/19/21 DRV2506L Haptic Motor Controller @adafruit @johnedgarpark #adafruit #newproductpick

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.