Here’s a $10 wood cut out microscope that you can use with your smart phone. While the magnification isn’t much, unlike Foldscope you don’t have to mount your samples on a slide. It’s easy to assemble and disassemble and packs flat, making it an ideal low-mag tool to put in your bag and use during […]
Here’s a paper by Jovana Milanovic ,Predrag Milanovic , Rastislav Kragic, and Mirjana Kostic which describes how to make a pH Stat to set and maintain a pH for under $200 excluding the cost of a pH meter.
It’s Technical Tuesday! This is a rough one, and we hope people will reach out to us and give us additional advice which we will include here. Today we are talking about the costs involved in keeping things cold, and how to mitigate them. We’ll start with the not very cold, and get colder. But […]
Foldscope is a paper-based microscope with a magnification of 140X and a resolution of 2 microns. You can buy 20 of them for $35 or get a fancy one for $40. Maya Anjur-Dietrich gave me an old model to play with. Included was a low mag lens, and a high mag lens with condenser. There was […]