It seems like using a basketball might be even simpler, if a bit more expensive.
And it can probably hold higher pressures.
The article was short on details like the pressure they used, how it was inflated, the nature of any valves, etc.
A basketball is normally inflated to about 8 psi (55 kilopascals) and has a volume of a little over 7 liters.
You could inflate it with the usual needle, and provide the rest of your equipment with their own needles so that it is easy to simply insert the needle when you want some pressure.
A 2-liter soda bottle can hold 150 psi (over a thousand kilopascals). Using half that number for safety still provides plenty of pressure, for even less money than the $2 balloon and nylon stockings.
On Wed, Mar 31, 2021 at 6:17 AM S James Parsons Jr <sjamesparsonsjr@gmail.com> wrote:
I love this simple approach. Watch the video super cool https://www.medgadget.com/2019/07/low-cost-diy-pump-for-microfluidics-made-from-balloons-and-nylon-stockings.html--On Mar 31, 2021, at 4:55 AM, drllau <drlawrencelau@gmail.com> wrote:<rh_20190730_diy_pump.jpg>
ARC-supported researchers have developed a simple pressure pump, made from balloons and nylon stockings, that will allow more people in more places to test water contaminants and blood samples. The ingenious device unveiled in the prestigious Lab on a Chip journal cost just $2 to make, yet works almost as well as its expensive and cumbersome lab counterparts.--
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<rh_20190730_diy_pump.jpg>
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