Hydrophobic barriers and casting crayons

There’s a neat, short paper called ‘Rapid Prototyping of Paper-Based Microfluidics’ that says if you want to create hydrophobic barriers in porous paper cheaply and easily, you can do it with crayons (which they tactfully call ‘wax pens’). Porous paper, like filter paper, if often used in microfluidics to wick fluid from one place to another; it can also be used to filter out particulates … Continue reading Hydrophobic barriers and casting crayons

Taking Apart an Inkjet Printer and Cartridge

Part of my bioprinter project is comparing the printing I can do using my craft robo contraption with the printing done using a modified inkjet printer. Several papers are published on using modified inkjet printers, so it’s a good standard. Following the instructions published in JoVE (Journal of Visualized Experiments) I went out to buy the oldest, shittiest printer I could, because they are less … Continue reading Taking Apart an Inkjet Printer and Cartridge

Cell Phone Microscopy

Over the past semester I’ve made several iterations of a small cell phone microscopy kit using commercially available currency detection microscopes that you can get for $7 on amazon. These guys get about 45x magnification, which is enough to be useful in diagnostics. In the cases where mine were used, it was useful to diagnosing STDs. Early prototypes used film canisters to hold the scope … Continue reading Cell Phone Microscopy

Taking Apart a CraftRobo

The main project I’m working on this summer is hacking a CraftRobo cutter to be used as a deposition tool for creating diagnostic tests. The idea is to put cheap, robust, open-ended tools in rural clinics and hospitals to empower them to create the devices and tests they most need without having to rely on multinational corporations deciding the kind of tests they need. Multinational … Continue reading Taking Apart a CraftRobo