A simple digital generator
In this project I developped a simple yet powerful digital (TTL) generator. Built around an Arduino Nano, the generator fits in a small portable 3d-printed package but it features single step or square-formed periodic signals, manual control of the delivering time or a preset number of periods, and control via the serial connection as well as a LCD with a selectable menu. Last but not least: there is a switch to choose between 3.3V and 5V.
Mechanical cheatsheet for CAD and 3D printing
Here is a one-page cheatsheet with selected info for standard metric screws, threaded inserts, hexagonal nuts and square nuts. In addition you also have the dimensions of the holes to insert in a design for 3D printing. To print and pin on your wall if you design awesome parts on a regular basis!
A stackable manifold for micro-valves
There can be numerous good reasons to use a computer-controlled microvalve: with low dead volumes and fast switching times they can be used for millifluidics, microfluidics or automation. Two common pitfalls are the driving electronics and the mechanical connection of the valve with the circuit. In this post I detail how to build a stackable manifold with Luer connectors for microvalves driven by a digital signal. Download all conception files for easy replication!
