A newcomer to electronics tends to be overwhelmed when first confronted with articles or books on microprocessors. The problems encountered generally fall into three categories:

• Firstly, we have a vast amount of new terminology and it is a sad fact of life that most books or articles assume the reader is familiar with this jargon.
• Secondly, there is an understandable impression of being filled with information from a hose pipe with the effect that the reader is able to understand little bits of technology but is unable to stand back and appreciate the whole picture.
• Finally, a lot of microprocessor logic appears to be terribly arbitrary.

Publisher: Bernard Babani Publishing
Author: E. A. Parr
Platform: Microprocessors

The Z-80 is generally acknowledged to be one of the most powerful 8-bit microprocessors available, and is used in many popular microcomputers including the TRS-80, Spectrum, ZX81 and Nascom machines, etc.

This book is intended for people who wish to progress beyond the stage of Basic programming to topics such as machine-code and assembly-language programming or need hardware details of the Z-80 based computer.

Publisher: Bernard Babani Publishing
Author: E. A. Parr
Platform: Z80

The 555 timer was first manufactured by Signetics but is now manufactured by almost every semiconductor manufacturer in the world. This book includes basic and general circuits, motor car and model railway circuits, and alarms and noise-makers as well as a section on 556, 558 and 559 timers.

Amazon Review
E. A. Parr's splendid little book on this widely used chip cannot be too highly recommended. It is a little classic. All you need to know, and a whole lot more you never thought to ask is here. Simply described and with a host of practical information on building circuits using the 555

Publisher: Bernard Babani Publishing
Author: E. A. Parr
Platform: IC 555