CJS Software and Electronics Resources

Developing from an early interest in general science, I've been interested in electronics and software both from a hobby perspective and in my professional career. This site contains a range of resources such as software applications, and informative or constructional articles on electronics mostly relating to those long-standing interests.

The 2016 version of this site has been completely rebuilt using responsive web design, and new material has been added including new additions to many of the previously published articles.

Software

My software pages include the following:

BackupCat

Did you ever wish there was a easy-to-use application that could keep your data files backed up as you worked, without having to manually update the backup every time? Or would you like to be able to install a backup system for someone else (e.g. family member, friend, employee) who might not otherwise want to be bothered with making backups, so that it gets done automatically for them? BackupCat has been designed to satisfy those needs!

BackupCat keeps your data files continuously and automatically backed up as you work. It keeps your files backed up to a second or remote drive, runs unobtrusively in the background without slowing down other applications, automatically updating backups as your files change, and includes the ability to automatically locate common user folders when you set it up (free for personal use or evaluation, new for 2016!)

CCTScribe

CCTScribe (Circuit Scribe) is a freeware circuit/schematic drawing and netlisting program capable of creating decent quality schematics and drawings and also able to export netlists for PCB layout and SPICE modelling.

WAVToCode

WAVToCode is a freeware audio format converter that generates C code format from WAV files, enabling sound effects to be incorporated in embedded processor code.

RFProp

RFProp is a freeware Windows program that calculates the radio wave propagation signal budget applicable to many kinds of VHF, UHF, microwave and satellite communications.

WinShoe IRC Client

This application can connect to multiple Internet Relay Chat (IRC) networks, and works on Windows XP, 7 and 10.

Software continued...



Electronics

My electronics pages include both some articles exploring the fundamentals of electronic engineering, and some articles describing some specific constructional projects.

Theory Articles

My theory articles cover the basics of the whole spectrum of electronics from valves (tubes) to semiconductors, including their principles and practical use, which should give you a basic introduction to the subject of electronic hardware. They include the following:

  • Basics of Bipolar Junction Transistors - How semiconductor diodes and transistors work with a basic introduction to their semiconductor physics.
  • Introduction to Biasing and Load Line Analysis - Explains biasing, and describes biasing methods for various types of transistor.
  • Physical Fabrication of Transistors, from Point Contact to Planar Epitaxial - Describes the development of transistor fabrication technology that led to the main bipolar junction and field effect families of devices and chips.
  • Introduction to Thermionic Valves (Vacuum Tubes) - Describes the history and fundamental principles of valve diodes, triodes, tetrodes and pentodes.
  • Introduction to RC coupled Audio Frequency Triode Amplifiers - Describes how triode valves are used in audio frequency amplifiers stage, how multiple stages are coupled together, how this relates to field effect semiconductors, and comments on other coupling methods and valve types. Includes examples of a 3W RC coupled triode amplifier, and a 5W pentode amplifier.
  • Modelling the LM35 Temperature Sensor in SPICE - How the common LM35 temperature sensor can be simulated using a SPICE model.
  • GPS Vehicle Tracking Systems - Describes how Global Positioning Satellite (GPS) systems work and can be used for tracking vehicles.

Constructional Articles

My constructional articles include the following:

  • A versatile, expandable 4-channel Sequencing Light Controller - Describes a light sequencer designed for future expansion by means of a plug-in module, for functions such as sound-to-light.
  • A Compact Digital TV Antenna for Home Construction - Describes the design and construction of an antenna for digital TV, which suits the UK Freeview, and other systems in a similar frequency band.
  • Geiger Counter and Ratemeter - This article describes the principles and construction of a Geiger-Muller radiation monitor and counter, that I had published in Electronics Today International, February and March 1987 (as of 2016, still working perfectly).
Electronics continued...



Photography

As an extra off-main-topic bonus, I have also included various miscellaneous articles that generally have an interest in photography in common.

The subjects include the Brunel Museum and Thames Tunnel, some photographs of Chrissie Hynde at a concert by The Pretenders, photographs and diary from a visit to Albania in 1987, photographs taken in Israel and the Golan in 1989, and some collections of tram and light rail pictures including some from other contributors.

Photography continued...