Category Archives: Power Supplies

Connections Conundrum

I spoke in my last post about needing to find connectors to link the wires between the amp PCB and the outputs.  I just spent the whole day looking at the web sites of RS Components, Farnell, Maplin and eBay. … Continue reading

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Construction Starts

Construction of the first Bluetooth Portable HiFi has started.  I am working on the power supply build. The photos above show the banks of power supply capacitors, one for the positive rail and the other for the negative.  They are … Continue reading

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Kicad PCB Software 3rd Attempt

I’m finally starting to get to grips with this Kicad software. The first attempt output nothing but errors. For the second attempt I used someone else’s files, having re-written the schematic to suit my circuit. But there were footprints missing and … Continue reading

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The Ripple Effect Continues

The schematic for the Amplifier Board, using the application Kicad, is now finished. It’s a complicated collection of applications, one to layout the circuit, another to layout the PCB, another to create the Gerber files – whatever they are, I’m … Continue reading

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High Current, Variable Output, Dual, Lab Power Supply Unit with Single Potentiometer Control

Note 1: Liquiphonics assumes no responsibility for the following circuit diagrams. Also, bear in mind that it has been designed for myself and so may contain parts you may not need. This is the circuit diagram (or schematic) for the … Continue reading

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Lab Power Supply Unit and Power Amp

Before I go ahead and construct version 3 of the amp, I need to make a lab power supply with variable plus and minus voltage outputs and ammeters for measuring the current drawn. I’ll be using the case from an … Continue reading

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V3 Relay Board layout complete

The Relay Board now also contains the regulation circuitry and its layout is complete. I’ll print out the drawing to use as a template for drilling holes and mounting the components. I’m very happy with the layout though there is … Continue reading

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