Test Equipment Upcycling – Variable Attenuator Module

A while back I found myself in the need of an adjustable RF attenuator capable of high-GHz operation. As luck would have it I had an old Spectrum analyser on the shelf at work, which we had retired quite some time ago. Spectrum analysers being quite capable test instruments, I

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Wheelchair Motor Service Part 1: Teardown & Inspection

Trolley Propulsion System: Wheelchair Motor Units So it’s time to get the propulsion system underway for the trolley, a pair of wheelchair motors were sourced for this, from HacMan. Since I don’t know how many hours are on these units, or how they’ve been treated in the past, I’m going

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Hair Dryer

This is a 1500W hairdryer, death caused by thermal switch failure. This is the switch unit. Attached are two suppression capacitors & a blocking diode. Cold switch is on right. Heating element unit removed from housing. Coils of Nichrome wire heat the air passing through the dryer. Fan unit is

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