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VU Meter using a lm3915 Circuit diagram

LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. VU meter uses just one IC and a very few number of external components. It displays the audio level in terms of 10 LEDs. The LM3915 is a […]

Tutorial on Printed Circuit Board Design

Tutorial on Printed Circuit Board Design Printed Circuit Board (PCB) is a component made of one or more layers of insulating material with electrical conductors and perfection in the work required if expecting good results. Currently the main generic standards for the design of a printed circuit board, clean, neat, really tested the results. Is […]

Circuit can be used for multiple Camera – Switch to monitor

Circuit can be used for multiple cameras with one monitor. The circuit can be operated manually or automatically. When operated automatically the switch will be connected to the output of 555 astable multivibrator that will send a continous square wave in the 4017 counter. When counter is running, the 5 transistor will switch one by […]

Make Electronics Schematic Diagram 3 lines mixer

Make Electronics Schematic Diagram 3 lines mixer you can modify this circuit become more than 3 lines mixer. Just add and repeat the input parts (P=10K R=22K).

STK4141 stereo power amplifier

STK4141 stereo power amplifier circuit based on single IC 2 x 30W Stereo Power Amplifier with STK4141

Sound Oscillator Circuit

Sound Oscillator Circuit for testing using BC559, BC549

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