To solve the issue of me forgetting to dose my aquariums everyday I have been developing an Arduino based dosing pump system. Using an Arduino IoT 33 and breakout boards I created a prototype to allow me to develop the on board C++ based code and the Android application to update settings via Bluetooth Low Energy.

Once happy with this design I used EasyEDA and JLBPCB to create a more permanent solution:

Although I’ve not perfected the pump yet I’ve been using OnShape to design my 3D printed peristaltic pumps