Relay NAND Gate Demonstration Board Biology_Entomology & Zoology Simulator Modules Available Separately:

Simulator Modules Available Separately:

Square die-cast alloy boss head with metal thumbscrews

this three-piece acrylic equilateral prism set supports optics experiments in dispersion and wavelength separation

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

Relay NAND Gate Demonstration Board Biology_Entomology & Zoology Simulator Modules Available Separately:Relay based NAND gate module on a demonstration base, introducing combinational logic behavior by using physical relays so students can hear and see the gate state in real time.