The 555 Timer IC is probably the most used IC in the world. It will give an accurate timing range of micro seconds to hours. This book describes the functions and operation of the 555, then explains 21 projects to build using the IC. Some of these include photo timer, touch plate controller, car wiper control, car lights turn off, flashers, generators, delays auto power on and off, NiCad charger, frequency divider, light operated relay, etc. An ideal book for the electronic hobbyist and experimenter. 76 pages 138 x 212mm.