Radio, Electronics and Computing Projects
by Hans Summers

I make no claims for technical accuracy, good design, or necessarily even originality for the contents of these pages. Rather, I am a simple enthusiast attempting to convey my love and enjoyment of radio, electronics, and computing and perhaps to inspire YOU to build something too. The following pages document projects that I have built over a period of 30 years. Wherever applicable I have named sources and references. In each project I have attempted to provide as much information as time and resources allow, but no responsibility can be accepted for inaccuracies or omissions. Likewise, where some of the projects use mains or high voltages, no responsibility can be accepted for death or injury sustained if you attempt to replicate these projects. BE CAREFUL! If you have any comments or suggestions, please email me. Due to the popularity of these pages and the increasing expense of web hosting and bandwidth, it has been necessary to include advertising on some pages to cover my costs.

 
GSM/GPRS Data logger PDF Print E-mail
Written by Hans Summers   
Thursday, 29 December 2011 11:45
GSM/GPRS Data logger, which can measure analogue or digital inputs, cache them in memory and upload them via the GSM/GPRS network to an internet database, send via email or SMS, etc. Email me.
Last Updated on Thursday, 29 December 2011 13:07
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Ultimate3 QRSS/WSPR kit PDF Print E-mail
Written by Hans Summers   
Sunday, 06 October 2013 10:20

The Ultimate3 QRSS/WSPR Transmitter Kit is the third version in the "Ultimate" QRSS/WSPR kit trilogy. It can produce QRSS, Hell and WSPR slow-signal modes anywhere from audio to 10m and above. Plug-in LPF filters are available for all 12 HF/LF bands.

The price is GBP £17.50 (approx USD $28 / EUR 20). To order please visit QRP Labs.

Last Updated on Wednesday, 10 September 2014 13:59
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