The bent wire game is quite a popular game. There is a bent wire in an electrical circuit and a ring has to be passed over the wire without touching […]

Obviously it is necessary to have a printed circuit board (PCB) before constructing any of the projects described in this book, and building your own printed circuit board is a […]

Originally the burp sound simulator circuit was built as quick lash up but because it was so popular, especially with children, it is still in everyday use. Exactly what it […]

This simple DC bulb flasher circuit has a number of uses in many fields. It is common knowledge that flashing lights are far more noticeable than those that simply remain […]

This simple electronic transistor thermometer circuit can be used for measuring the temperature of the surrounding effectively using minimum number of components. Introduction All semiconductor materials are heat sensitive, some […]