Red LED Demonstration Board Rod Material_Steel Built on a leveled cast-iron

Built on a leveled cast-iron base with a dual-angle polymer top

Larger 100 x 12 x 15mm Alnico horseshoe steps the pole-gap geometry up from the 75mm model

the flywheel light enough to drive by breath for hands-on reciprocating-engine study

this 4mm-stackable lead with nickel-plated pins provides reliable connections in student-built bench wiring

including a digital multimeter and oscilloscope

Red LED Demonstration Board Rod Material_Steel Built on a leveled cast-ironRed LED on a demonstration base with 4mm plug connections, sized as a self contained module that lights up when current flows the right way for polarity and circuit lessons.