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Monitor and switch up to eight sets of points (“railroad switches”) from a single Controller. We also show you how to make LED-based signals to go with each set of points. by Les Kerr
This compact microphone preamplifier runs from a 9-15V DC plugpack, offers a flat frequency response, low distortion, low noise and adjustable gain (-15dB to +50dB). it also includes switchable 48V phantom power. by Phil Prosser
This Mains Power-Up Sequencer solves many problems caused by powering up several devices simultaneously, including circuit breakers tripping, thumps from audio equipment and modem/router overloading. The Mains Power-Up Sequencer can also power several appliances on or off when a ‘master’ appliance switches on or off. by John Clarke
A modern alarm clock can take the trouble out of alarm setting and time keeping. This clock runs off most of the common models of Raspberry Pi (3, 4, Zero 2W etc) and can act as a Bluetooth media player. by Stefan Keller-Tuberg