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Archives for February, 2010

Making 15W FM RF Amplifier using 2SC253

This is a FM RF amplifier which build based on RF Power Transistor 2SC2539. 2SC2539 is a silicon NPN epitaxial planar type transistor designed for RF power amplifiers in VHF band mobile radio applications. L1: 2T Coil diameter:4mm L2: in series 6pcs Toroidal ring L3: 4T Coil diameter:10mm L1: 3T Coil diameter:10mm

555 timer MCT2E opto-coupler

The main components used are 555 timer MCT2E opto-coupler The main components used are 555 timer MCT2E opto-coupler

Led circuit – Power Supply

Led circuit – Power Supply Led circuit for the Power Supply using BD139 Power Supply circuit – 16VAC x 2 (ct) to 39v using ZD30v Led circuit for the Power Supply The size of the LED and resistor to supply some tips on supply, and of course will provide many details about the LED driver […]

Electrical wiring diagram circuit

Guide Wiring Diagram Electrical wiring diagram circuit for your home should be according to plan and rules, because the wiring diagram in the work will be much risk if not properly and lack of experience. How to do the job right wiring diagram circuit ? answer is to ask an expert or search for information […]

How to read Resistor Color Codes?

How to read Resistor Color Codes? Here CODE COLOR RESISTOR for Resistor color coding scheme and calculator in JavaScript. resistor color code Calculate Resistor Values from Color Codes. Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White. Black, Brown, Red, Orange, Yellow, Green How to read Resistor Color Codes? Here CODE COLOR RESISTOR for […]

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