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All our electricity teaching modules c an be powered from a d.c. power supply, batteries or a USB mains plug (the type used for mobile phone charging). All modules use 4mm connection leads which are available separately, if required. Four units will easily fit into a shallow Gratnells tray to aid storage. Module 2 Mounted on a tough acrylic base, this module includes 1 x red LED, 1 x yellow LED, 1 x green LED, 1 x blue LED, 1 x bi-colour LED, 3 x push switches. Useful for teaching: switching, introduction to LEDs; polarity of LEDs; series circuits; parallel circuits.
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