Alan photoI have established this site to facilitate public knowledge of a few things that may be useful or interesting to some people. There are no advertisements and nothing to buy, just  information.
My Résumé.  This gives some background information about me.

Contact me   If you have any questions or comments then click the link.

Stevenson Screen 1

Stevenson Screen for a Home Weather Station.

(This shows you how to make a fairly effective radiation shield to improve the accuracy of the temperature readings in a typical 'home' weather station)


MagnaBend 1250E

MagnaBend Sheetmetal Folding Machine

Lots of information about the "Magnabend" sheet metal bending machine.  This machine was manufactured in Australia by Magnetic Engineering Pty Ltd (a company which I managed) up to year 2003.
The original patents on the concept have now expired and this has allowed manufacture in several other countries, not necessarily under the 'Magnabend' name.
I established this website to help preserve the technology behind this invention and to help manufacturers and constructors get the basics right.


Erica 1

Spanish Heath (Erica lusitanica)

This page shows you how to recognize and eradicate Spanish Heath which is becoming a serious weed in some parts of Australia.


Side view of chair, png format

Badminton Umpire's Chair

This page explains a problem which I have observed with badminton umpire's chairs and has links to my detailed  drawings  which depict a better design.  I am providing these drawings simply as a service to the sport.



HTC One X Camera Review

(This review was done in 2012 and thus is now (2018) a bit old.
However this phone can still be purchased and some may find this review still useful).

My review of the camera function of the HTC One X mobile phone, including sample pictures and a discussion of the pros and cons.

Other Sites authored by Alan:-

This page last up-dated August 2021
Author: Alan Bottomley