centrifugal – Experimental Engineering

Ameteur Radio, Hacks, Personal Project, Randoms

DIY SMPS Cooling

September 27, 2015 The Engineer

The power supplies I have recently built from surplus Cisco switch boards have started displaying a rather irritating problem – continual load of over 9A causes the supplies to shut down on overheat. This was partially expected, as the original switches that these supplies came from are cooled by a

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Consumer Gear

Combo Microwave

February 26, 2011February 10, 2011 The Engineer

Here are the internals of a cheap Microwave/Convection Oven combo. Electronics bay is pretty much the same as a standard microwave, with the magnetron, transformer & diode/capacitor voltage doubler, with the addition of an extra fan & a pair of nichrome elements to provide the convection oven function. Convection blower

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