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simple mic pre-amp based LM358
140W Amplifier Circuit ( 2x 70 Watt ) Schematic Diagram
the monitoring systems of railway level crossing of mining area of Atmega128 one-chip computer and GPRS
220 volt disco lamp circuit
60 Watt Guitar Amplifier
Vacuum Tube Synthesizers
water alarm schematic
Crystal Controlled FM Transmitter Circuit
Hydraulic oil Automotive LED Alarm SL322C schematic