10pcs LM3915N-1 LM3915N LM3915 DIP-18 LED Lighting Drivers DOT/BAR Display DRVR New Original

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3 dB/step, 30 dB Range
Drives LEDs, LCDs, or Vacuum Fluorescents
Bar or Dot Display Mode Externally Selectable by User

Amazon.com Price: $12.00 (as of 10/12/2019 17:23 PST- Details)

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The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, getting rid of the need for current limiting resistors. The whole display system can operate from a single supply as little as 3V or as high as 25V. The IC accommodates an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1.5V of the positive supply. Further, it needs no protection against inputs of ±35V. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is normally better than 1 dB. The LM3915’s 3 dB/step display is suited for signals with wide dynamic range, such as audio level, power, light intensity or vibration. Audio applications include average or peak level indicators, power meters and RF signal strength meters. Replacing conventional meters with an LED bar graph leads to a faster responding, more rugged display with high visibility that retains the ease of interpretation of an analog display. The LM3915 is extremely easy to apply. A 1.2V full-scale meter requires only one resistor along with the ten LEDs. One more resistor programs the full-scale anywhere from 1.2V to 12V independent of supply voltage. LED brightness is easily controlled with a single pot. The LM3915 is very versatile. The outputs can drive LCDs, vacuum fluorescents and incandescent bulbs in addition to LEDs of any color. More than one devices can also be cascaded for a dot or bar mode display with a range of 60 or 90 dB. LM3915s will also be cascaded with LM3914s for a linear/log display or with LM3916s for an extended-range VU meter.
3 dB/step, 30 dB Range
Drives LEDs, LCDs, or Vacuum Fluorescents
Bar or Dot Display Mode Externally Selectable by User
Expandable to Displays of 90 dB
Internal Voltage Reference from 1.2V to 12V

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