Part 3/7:
A separate device, a solar-powered calculator, is introduced as part of the testing setup. The experimenter demonstrates that removing an external black tape causes the calculator to turn back on, implying a controlled test environment or perhaps an attempt to understand power draw or interference effects on small electronic devices. The complexity of handling multiple tools—multimeter, calculator, wires—becomes evident as the experimenter juggles these components, illustrating the challenges of conducting in-field experiments.