OR Logic Gate, 2-Input Pack Size_7 this three-dimensional Paramecium sectional model

this three-dimensional Paramecium sectional model reveals internal structure and ciliate organization for microbiology teaching

gripping square or round rods up to 16 mm and accommodating flat articles like rulers and drawing boards

and 12 volts on this 2-amp battery eliminator power supply

Nylon ball-bearing pulley with a bench-clamp fitting for edge-mounting on a worktable

OR Logic Gate, 2-Input Pack Size_7 this three-dimensional Paramecium sectional modelLED indicating 2 input OR gate module showing HI and LO states with red and green LEDs and a printed truth table on the board, verifying the Boolean disjunction operation by direct observation.