To build a flow meter using basic electronic components, a positive displacement design is recommended, where a piston or rotating shaft displaces a consistent volume of fluid per cycle. The key requirement is to measure the frequency of these cycles, which can be achieved using a magnetic pickup and notches on the shaft connected to an oscilloscope. This method allows for accurate flow measurement without complex electrical components. While simpler mechanical methods exist, utilizing electronic components aligns with the educational goals of an electrical engineering student. A focus on frequency counting will facilitate effective flow meter construction.
