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Posts tagged BC558

variable dc power supply circuits

variable dc power supply circuits power relay suppliers using BC558, BC548 variable dc power supply circuits variable dc power supply circuits for power supply relay

Low Power Amplifier Circuit

Best Low Power Amplifier Circuit Diagram Driver PCB and Lay out Power Amplifier Circuit Diagram using 1 N4937 2 N5551 2 N5401 2 SC4793 2 SA1837

why should be improved DDR2 memory to DDR3

DDR3 offers a substantial performance improvement over previous DDR2 memory systems New DDR3 features all transparently implemented in the memory controller, improve the signal integrity characteristics of DDR3 designs soo that higher performance is achieved without an undue burden for the system designer. If proper consideration is given to any new DDR2 memory design it […]

Echo Repeter and preamp mic schematic

Echo Repeter and preamp mic schematic Part R1,6,25,36,48,54           2K2 R2,7,16,27               470K R3,8,26,31               12K R4,9,39               220R R5,10                   22K R11                   1M5 R12,45                   10K R13,52,53,58,59           […]

Make 2.45GHz RF Signal Detector

Make 2.45GHz RF Signal Detector This passive RF indicator is made from a few simple parts.  A 100uA moving coil meter is used to display the relative intensity of the RF signal.  This circuit can be used with some cellphones and many cordless telephones.

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