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One of the most important devices in any electronic projects. DC Power Supply.
This custom made DC Power Supply is variable 0-15V with fixed voltages 5V and 12V.
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This is the PCB ckt. of the 9V DC Electronic Metronome. You can use an etching machine in your area, or you can do it manually using FeCl(Ferric Chloride).
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This is one of my electronics projects that I constructed - It is called the ELECTRONIC METRONOME 9V DC. I get it from Electronic Enthusiasts Magazine, I made some few modifications with the existing ckt.
