Used by middle school students, connected to a DC power supply of about 2-6 volts. We noticed that one of the connections was starting to wear out quickly, where the circuit is completed between the bell lever and the negative cable. Maybe bad design or bad material?
π‘ Brilliantly Illuminating: Frey Scientific 3-Piece Fluorescent Set
3 Review
Hand Sorted Educational Protection - DANCING BEAR
3 Review
13357 Geosciences Industries Intro Collection
3 Review
π Exploring the Fascinating World of Amazingbug Lifecycles: Classroom Specimens for Hands-on Education
3 Review