When the night weather is hot, a gentle cooling breeze from a fan can keep you cool and help you to sleep. This new Fan Speed Controller is an effective, noise-free, low-speed fan controller. It works with ceiling, pedestal and box fans. by John Clarke
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A signal generator is one of the most useful instruments on the test bench. This flexible and easy-to-build generator provides two wide-range, low-distortion outputs. It can be controlled from its LCD touch screen or remotely by a computer, tablet or smartphone using a WiFi connection. by Richard Palmer
This project demonstrates how two modules can be combined with a bit of extra circuitry to do a useful job. The result is a circuit that will power a load, like a fan, when the ambient temperature exceeds a set threshold. by Tim Blythman
This small board converts a standard 10MHz frequency reference (eg, from an oscilloscope) to 1MHz and 1Hz square wave signals. The latter can emulate the 1PPS output of a GPS receiver and has options for a 10% or 50% duty cycle. by Nicholas Vinen