Roger G3XBM's (Mainly) Amateur Radio Blog

Certainly here in the UK, some people are worried sick over the horrendous rise in energy costs. Some are thinking is it food or heating? T...

There is little doubt we all have to do better if we are to help reduce the increase in temperature of our planet. I am one of the culprits:...

This is the "holy grail" of renewable energy. These days solar and wind energy are cost effective, but they are not always there w...

FreeCharge 12V is a small, portable generator, similar to that used in portable hand-cranked torches. The output is regulated to give 12-1...

This application note shows a 32uW oscillator using EPAD FETs that works with 0.5V supply and may be useful for "harvested energy...

The idea of powering a low power receiver, or even a transceiver or QRPp beacon, from free, otherwise wasted, RF energy that is all around u...