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Posts tagged 7805

Transformerless power supply design. Part : 2

Transformerless power supply design Transformerless power supply design 5V Transformerless power supply design using 7805 Transformerless power supply design This circuit is a small +5V power supply. … and variable power supply circuit of 12 volts using IC 7805 and not any operational amplifier. Transformerless power supply design

Make a simple power amplifier – LM 380

This is Make a simple power amplifier – LM 380. Almost all the components are contained in a single 14 pin package and requiring few external components. The supply voltage can be from about 8 volts to not more than 15 volts. The device is supposed to have internal current limiting and be almost indestructable. […]

Making DIRECT PCB PLOTTING

This article is about another method I tried and had 100% success first time. The object is to modify an old plotter pen so that you can draw direct onto the PCB material itself. No photography, just a new pen. All you have to do is the use one of those Faber Castell S overhead […]

LM555 Electronics Schematic Diagram Sweeping Output Frequency Siren part 24

LM555 Electronics Schematic Diagram Sweeping Output Frequency Siren part 24

Radio Circuit

Making Radio Circuit Here there are a variety of radio series that you can compare, where appropriate and the most perfect.  In a radio receiver must know about the advantages and disadvantages of the radio series and types of components used. R1     100KO R2     2.2KO VR1     50KO D1    LED C1    […]

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