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This is my PSU helmet after a training exercise recently, some of the blows nearly knocked me over #trainingmatters
DC variable PSU based on L200.
The basic idea was to reuse some spare parts, like the case, diode bridge and heatsink, from an ATX PSU, the transformer from a dead UPS, and the output banana terminal from an audio amplifier.
This is part of an idea to build some stuff that helps my kids to initiate in electricity. Hence, there's no need for higher voltage or current from the PSU, since it's purpose is to replace batteries to light some low power bulbs, LEDs, motors... and when possible, with the idea of recycle and DIY present, so they can also learn, from example, that they can build stuff themselves and they don't need to buy everything ready made, or throw away everything that doesn't work anymore, in a logic of consumer electronics disposal.
My Reference TDA1541A DAC project comes to the final stage, the housing.
After my decision to make a tube rectifier circuit for the B+ of the Tube-I-zator output stage,
i will make a two case design with a separate case for the PSU.
Into the PSU case i will insert the two +/- Power Supply Modules and the Tube rectifier circuit.
The transformer goes on the top of the case in a separate aluminum housing. Also the tube rectifier goes on top.
Because i will use only MKP Mundorf caps in the rectifier circuit, the 47µF and the two 100µF caps goes through the top panel.
Because i´ve got a perfect aluminum transformer housing, i´ve made a 1mm deep square to get no visible air gap.