by Guy Nicholson | Sep 20, 2026 | Uncategorized
I recently found an old signal generator project I made in the very distant past. It was almost certainly built from an article in a popular electronics magazine, possibly sometime in the 1980s. Unsurprisingly, it had been left in a drawer gathering dust until it...
by Guy Nicholson | Jun 7, 2026 | Electronics
After a gap of almost 30 years, I found myself returning to amateur radio. With a little more spare time on the horizon and a renewed interest in low-cost microcontroller projects, it seemed the perfect opportunity to pick up the hobby once again. It wasn’t long...
by Guy Nicholson | Dec 22, 2023 | Electronics
What is an arbitrary waveform generator? It’s a device that creates a wide range of electrical waveforms, allowing users to generate wave shapes like sine, square, and triangular. This versatility makes it ideal for testing and experimenting in fields like...
by Guy Nicholson | Apr 15, 2023 | Electronics
Looking for a device that can produce precise and controlled mechanical movements? Look no further than the servo motor! This nifty gadget operates by utilizing a DC motor, mechanical gearing, and cutting-edge electronics to set the servo’s rotary position via...
by Guy Nicholson | Nov 5, 2022 | Electronics
With many variable capacitors becoming hard to get I wanted to see if it was possible to build a homemade version suitable for a medium wave radio. Looking on the web there are a few examples. Unfortunately these tend to be mechanically challenging, needing workshop...
