5559572
9780816761968
Kids discover the wonders of electricity with this great kit containing everything they need to build a real doorbell without using any tools. It includes a transistor, resistors, a transducer, an Led, connector wires and springs, and a push button. All parents need to provide is a 9-volt battery.Luann Colombo is the author of 'Buzz Off! Build Your Own Electronic Doorbell', published 2000 under ISBN 9780816761968 and ISBN 0816761965.
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