Specially designed for middle school physics, university circuit foundation courses, and innovative laboratories, using a "replaceable component+sensor quantification" approach to transform abstract formulas into visible and measurable data curves. The printed circuit board integrates 4 independent RC channels, each with a dip switch to switch resistors/capacitors. Real time curves and data tables, students can understand the "5RC" rule at a glance. Full low voltage design, short circuit protection, suitable for 40 people to operate simultaneously. Applicable scenario: High school Physics elective 3-1 "Capacitors and Capacitors" classroom demonstration. Basic experiments of "Circuit Analysis" and "Analog Electronics" in university. Youth technology activities and STEAM maker courses.