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LED VU Meter - CircuitLib - Electronic Circuits
https://www.circuitlib.com/index.php/schematics/product/69-led-vu-meter/category_pathway-28
LED VU-Meter schematic. How to use and calibrate the VU meter. Connect VU-meter's ground to your amplifier's ground. Then, connect C8 and C2 capacitors …
An LED bargraph audio level display – Electric Druid
https://electricdruid.net/led-bargraph-audio-level-display/
Audio Meter with optional Peak Hold 0-5V bargraph driver 16F1503 code AUDIOMETER.ASM; Compiled version of the above for programming onto 16F1503 chip, AUDIOMETER.HEX; Schematic for the Audio Meter with optional …
LM3916 LED bargraph/ VU meter | KuzyaTech
http://kuzyatech.com/lm3916-led-bargraph-vu-meter
Brief description: This kit builds on a famous LM3916 VU bargraph driver chip from TI/National semiconductor. The chip is essentially a constant current 10 segment driver fed by an array of comparators. It also provides internal reference voltage …
LED Bargraph Indicator - w1ghz.org
http://www.w1ghz.org/PCBproj/bargraph.pdf
Figure 1 – Schematic of LED Bargraph Display Figure 2 is a photo of a completed unit, top and bottom. Depending on how you wish the bars to display, the LED bargraph and the trimpots may be mounted on either side of the board – just make sure that the pin 1 side of the bargraph is at the edge of the PC board.
Audio level meter circuit diagrams
http://circuit-diagrams.net/categories/audio-level-meter
Audio VU Meter. This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores.
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