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Posts tagged lm3915 Circuit

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 […]

Audio power amplifier design handbook douglas self

Audio power amplifier design handbook douglas self 2 x 6W using MB3722

Audio Recorder Circuit

Audio Recorder Circuit using LM324, PIC16F84A, ULN2803A, 1N4148, 2N3904

Tone Control

Stereo Tone Control circuit using fet 2SK30 and Tr A561, C734 Stereo Tone Control circuit using fet 2SK30 and Tr A561, C734

Making RF Meter 2.4 GHz Wave Antenna

RF Meter circuit 2.4 GHz Wave Antenna using  LM324 RF Field Strength Meter detects Accuracy in the FM, TV and cell tower frequency range 30 MHz – 2.4 GHz

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