I am planning to build a low-cost DRM only receiver($50).
In this regard, looking for help to building a low-cost SDR which could provide IQ data and tune frequency range from 500kHz to 1.7MHz.
I am working on a spiral spring powered dynamo system. Where a dynamo is driven by spiral spring through gears.
I am new to the spring design and need help in designing. Does anyone know how to design a spring that could store 100 kilo Joule of energy? The energy stored in the spring will then...