Author Description

Contents Foreword Introduction Switches Key to symbols Switches and how they are used Materials required Taking care with soldering irons Building a circuit with copper tape Why we use circuit diagrams Building a membrane switch Developing graphics ideas for membrane switches Designing a game Getting started with graphics Two design sheets for developing your own game and switch ideas Designing an electronic quiz Developing a motorised toy L.E.D.s L.E.D.s - light emitting diodes Materials required Preventing damage to L.E.D.s Making and testing the circuit Circuit diagram Capacitors and time delays Developing the circuit Using the circuit Design Ideas Two design sheets for developing your own ideas Investigating bi-colour L.E.D.s Investigating tri-colour L.E.D.s Flashing L.E.D.s FFlashing L.E.D's MMaterials required Protecting Flashing L.E.D.s Making and testing the circuit Circuit diagram Investigating the flashing L.E.D. circuit Developing the circuit Using the circuit Construction Techniques Two design sheets for developing your own ideas Ideas for card modelling The Thyristor The Thyristor Materials required Protecting the thyristor Making and testing the circuit Circuit diagram Investigating the circuit Developing the circuit Using the circuit Input Control and Output Two design sheets for developing your own ideas Other ways to trigger the circuit Sensing light or dark The Transistor The Transistor Materials required Protecting the transistor Making and testing the circuit Circuit diagram Investigating the circuit Developing the circuit Using the circuit The potential divider Two design sheets for recording and making notes on possible applications Increasing circuit sensitivity Pulsed outputs Index