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My daughters computer, she has a very small room and nowhere to put ths machine, except under her bed. To make sure it did not overheat, I added feet, actually (washing) machine feet to raise it up.

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A bluetooth speaker was dropped by the kids and stopped working, but after examination it was a tiny wire between the power switch and the circuit had come loose, so after soldering it with my old soldering iron, it worked perfectly again.

EXIF Fullsize    SAMSUNG GT-I9100

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Dolls house with lighting from a bespoke power supply and control unit which could control individual lights

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EXIF Fullsize    OLYMPUS IMAGING CORP. VR360,D760

EXIF Fullsize    OLYMPUS IMAGING CORP. VR360,D760
My A-Level Electronics project, design and build a power supply. TTL chips were very popular at the time, so I included a -5 0 +5 volt supply as well as a 0-30 volt variable output.