Concave Glass Mirror, 75mm Diameter, 200mm Focal Length Ag Mechanics and chamber walls at a

and chamber walls at a scale visible for group demonstrations

introducing combinational-logic behavior by using physical relays so students can hear and see the gate state in real time

Solid metal 1kg rollers at 8cm wide by 4

Demonstrates the polarity-sensitive forward-bias behavior of a light-emitting diode on a base with two 4mm terminals

sized for breadboarded circuits and compact apparatus where the standard 4mm hardware doesn't physically fit the layout

Concave Glass Mirror, 75mm Diameter, 200mm Focal Length Ag Mechanics and chamber walls at aWider aperture concave glass mirror at 75mm with 200mm focal length, ~3mm thick, the f 2. 7 ratio brightening real image projection setups in image formation experiments.