Buzzer Demonstration Board with 4mm Terminals Lab Equipment and Supplies_Metal Labware Two-part split heart model on

Two-part split heart model on an integrated base separates into right and left hemispheres

and workshop tasks

One-amp DC scale on a 315x115mm laminated panel with sealed shunt

this electromagnet on a 4mm-terminal base slots inline with other modules for circuit-driven magnetism work

Plated spring arm with press knob and a single contact stud

Buzzer Demonstration Board with 4mm Terminals Lab Equipment and Supplies_Metal Labware Two-part split heart model onUsed to give student built circuits an audible signal of completion, this low current 2mA buzzer on a demonstration base sounds whenever current flows through the closed circuit.