Schematic and construction

The original design concept for this equipment was developed by John Errington MSc and Sylvain Frenehard at Northumbria University. At the time although all stages worked correctly it was not possible to combine them to produce a working design. During 2014 Mr Ken Horton carried out further development to produce a complete working product, and the following documents are provided with his permission, with all rights reserved.

Click below to view or download full-size documents.


Schematic diagram for complete circuit


Printed Circuit Board


Silk layer


Front Panel


List of components