Anti Theft Security For Car Audios

This small circuit, based on popular CMOS NAND chip CD4093, can be effectively used for protecting your expensive car audio system against theft. When 12V DC from the car battery is applied to the gadget (as indicated by LED1) through switch S1, the circuit goes into standby mode. LED inside optocoupler IC1 is lit as its cathode terminal is grounded via the car audio (amplifier) body. As a result, the output at pin 3 of gate N1 goes low and disables the rest of the circuit.Whenever an attempt is made to remove the car audio from its mounting by cutting its...

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2 X 40 Watt STK amplifier

Components of the above is one component of ic which is applied as a reinforcement. Power amplifier used in an audio signal in order to become more powerful and can be heard via a tool that is the speaker. But in each set must have a voice amplifier, voltage, power quality is different. For the IC has the output power above 2 X 40 Watt with 8 Ohm output impedance. Supply voltage ranging from 18 Volt to 32 Volt.Part ListResistorR1_____1KR2_____1KR3_____22KR4_____22KR5_____1K2R6_____100KR7_____560RR8_____1KR9_____1KR10____470RR11____4R7R12____3K3R13____3K3R14____4R7R15____470RR16____100RR17____100KR18____1K2CapacitorC1_____470pFC2_____470pFC3_____4u7FC4_____4u7FC5_____82pFC6_____82pFC7_____47uFC8_____100uFC9_____10nFC10____39pFC11____100nFC12____47uFC13____47uFC14____100nFC15____39pFC16____10nFC17____100uFC18____47uFIntregated...

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