Designing a low-cost, open source ventilator with Arduino #CoVID-19 #coronavirus

Desperate times call for desperate measures, and while making your own medical equipment isn’t normally advisable, Johnny Lee’e project explores how to turn a CPAP machine into a ventilator.

The idea is that since these machines are basically just blowers controlled by a brushless DC motor, an Arduino Nano equipped with an electonic speed controller could allow it to act as a one.

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RaspberryPi vs. Arduino : The Battle of the Micros

Hello guys, in today’s articles, I will try as much as i can to do justice to the comparison between an Arduino and a Raspberry Pi. Oftentimes, there has been a comparison between Window Vs Linux, Edilson Vs Tesla, AMD Vs Intel and micro-controller Vs microprocessor. People get confused when it comes to selecting/choosing the right boards for their next project which later leads to an argument or comparison.

Comparing these two boards is like comparing a calculator with a laptop, it’s kinda funny tho. The two boards have their advantages and disadvantages over one another.

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How to build a Hidden Shelf Edge Clock – 3D Printable | Elegoo Arduino Nano | Smart Home | LED

I’ll show you how to build a very smart looking shelving system that includes a hidden giant clock in the edges of the shelves, and integrated LED downlighters to show off your favorite items on the shelves.

As the lighting is LED (using WS2821B ‘Neopixels’) you can choose your own colours. A discreet photoresistor also dims the LED’s when the ambient light levels drop – great for evening ambiance in any room.

Control the volume of programs running on your Windows PC like a DJ

If you have multiple applications open in Windows, you may want one to be louder than the other, but what if you want to adjust levels with physical sliders like an actual DJ? If that sounds interesting, check out this controller by “Aithorn.

The device uses an Arduino Nano to read signals from each slider and pass this info over to the computer. A Python script, along with a VBScript helper, runs on the PC to control the master and program-specific volumes.

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PWM – Pulse width modulation

PWM is widely used in electrotechnics for lights, chargers, motors, generating different signals, etc. which are all present in robots as well. In short, PWM is a way of expressing analog values in the digital world.

Fundamentals

You have probably wondered how, in the digital world, we can use some other value than supply voltage – which is output value from our microcontrollers like Arduino. The solution for this is PWM, which is essentially a microcontroller turning the output pin on and off very fast so that, for example, rather than seeing LED blinking, our eyes see an average brightness of LED being on and off.

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Resys is an LED drawer system that makes it easy to find your resistors

You’ve got your design ready to go, you know you have the right components… but where exactly did you place that particular resistor? With the Resys drawer system by Lynlimer, you no longer have to wonder — just type in the needed value and the proper drawer lights up automatically.

The device is based on an Arduino Nano, with an LCD display for text output and a numeric keypad for value entry. The proper drawers are lit via WS2812B addressable LEDs, held in 3D-printed holders. 

It’s a clever project that could be expanded to well beyond the 16 drawers now used. Code, STLs, and circuit diagrams are available in Lynlimer’s write-up if you want to make your own!

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