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Archives for September, 2013

Colour Decoder circuit

Colour Decoder circuit Multistandard Colour Decoder With NEgative Colour Difference output Signals using TDA4651

PCB Repair

Circuit Board Repairing

stereo tone control circuit

stereo tone control circuit using A726 and C1313

Learn a few Tricks PCB Design Tutorial

PCB Design Tutorial – Learn how to design PCB and Learn a few Tricks PCB Design Tutorial


The program only needs a simple “infinite gain” circuit to square off the input tones so that they can be read by the serial port. This is achieved using a 741 operational amplifier. The basic circuit of the unit is given below. The RS232 pins are given for a 9-pin serial port. A 25-pin port […]

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