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Archives for February, 2013

Portable jammer

Portable jammer Portable jammer and signal removal for cell phone, WiFi, and GPS signals Portable jammer, signal removal Portable Signal Jammer circuit 20M Radius. High Power Signal Jammer Portable powerful and portable solution to completely block a nearby cell phone,  WiFi, and GPS signals. Can be used around the world. Strong and effective, this portable […]

Introduction to PCB Manufacture for Hobby

Introduction to PCB Manufacture for Hobby

PRE AMP MIC

PRE AMP MIC 3 TR USING BC550C BC556 BC546 PRE AMP MIC 3 TR USING BC550C BC556 BC546 R1_____________ 1K5 R2_____________ 220K R3_____________ 18K R4_____________ 330R R5_____________ 39K R6_____________ 56R R7,R10_________ 10K R8_____________ 33K R9_____________ 150R R11____________ 6K8 R12,R13________ 100R R14____________ 100K C1_____________ 220nF 63V C2_____________ 220pF 63V C3_____________ 1nF 63V C4,C7__________ 47µF 50V C5,C6__________ […]

battery charger schematic

Dry Cell battery charger schematic using LM741, 4011, BD139, BC548

Electronic circuit to fill the IC EEPROM MEMORY

Electronic circuit to fill the IC EEPROM MEMORY Based on its memory capacity is usually written with a number 24CXX, For XX is its capacity in Kbit. Example: 24C08 means its capacity 8 kilobits. In many stores that sell the number 24C01, 24C02, 24C04, 24C08, 24C16, 24c32 which sold in its data store is empty. […]

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