Green LED Demonstration Board Graduations_Raised and baskets for scrubbing metal

and baskets for scrubbing metal parts in workshop and garage environments

restoring rotary control over UV sanitization cycles when the original cracks or breaks off

used both in galvanic-cell construction and as the photoemitter in classic photoelectric-effect demonstrations

two movable bridges

and 4-pole armature configurations on the same motor frame by swapping interchangeable enameled-copper armatures past a permanent bar magnet on a disc commutator

Green LED Demonstration Board Graduations_Raised and baskets for scrubbing metalUsed to introduce LED polarity and forward bias behavior, this green LED on a demonstration base with 4mm plug connections lights up when current flows in the correct direction.