Add your own passive or active seismic sensors. The Raspberry Jam Universal digitizer (RJAM) was designed to work with most seismic sensors and supports 3-channels of single-ended and differential-ended signal inputs, passive and active sensors. Through-hole mountings are provided for resistors and capacitors to make it easy for electronics engineers and power users/ Do-It-Yourselfers (DIY) to swap out components. The system is highly customizable. Click here for technical details.