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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eBay Special – LED Disco Light With Built In MP3 Player

Here’s an eBay oddity – it’s got the same light & lens mechanism as the cheap “disco light” style bulbs on eBay, but this one is battery powered & has a built in MP3 player. This device simply oozes cheapness. The large 4″ plastic dome lens sits on the top

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CRT Flyback / Line Output Transformer Destructive Teardown

Here’s a small flyback / Line Output Transformer from a portable colour TV set. Usually these transformers are vacuum potted in hard epoxy resin & are impossible to disassemble without anything short of explosives. (There are chemical means of digesting cured epoxies, but none of them are pleasant). This one

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Sony Xperia Z3 50% Battery Problems

Recently my phone decided it was going to die a battery-related death, and having not found much useful information on the Great Google, (all the information I could find, was hinting at many issues from firmware to a faulty motherboard, nobody seems to have actually done any investigation into similar

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DIY Eberspacher Glowplug Screens

One of the central parts to the Eberspacher-type evaporative burner is the wire mesh screen that surrounds the glowplug, where the incoming fuel is heated to vapour before it’s blown into the combustion chamber & burned. These screens, like glowplugs in the older heaters, are consumable parts and either get

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FE-5680A Rubidium Frequency Standard – Initial Teardown

Here is a quick look inside the FE-5060A Rubidium Frequency Standard. Above you can see the entire physics package, with the rubidium lamp housing on the right hand side. The ribbon cable running into the resonator cavity has the power & signal traces for the internal heater, temperature sensor &

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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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