설명
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.
책 세부 정보
형식
하드커버
페이지
16 페이지
언어
영어
출판됨
Oct 1, 2000
출판사
Troll Communications Llc
ISBN-10
0816761965
ISBN-13
9780816761968