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The cheapest and simplest way of getting a negative voltage rail
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Negative Voltages are more important than you think! So here is how to make them! EB#52
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DIY SYNTH PSU: How to design a simple dual power supply
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EEVBlog #1116 - How to Remove Power Supply Ripple
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DIY Dual Rail Power Supply
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Power For Your Electronics Projects - Voltage Regulators and Converters
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