how to make music level light:
This is a led music level indicator circuit diagram for an amplifier. this led music level indicator can increase amplifier fit-out. also, we can understand the volume level. also can measure the right and left side audio levels.
The LM3915 is a mono-integrated circuit that has analog voltage levels. It drives ten LEDs, and LCDs. providing a logarithmic 3 dB/step analog display. 1 pin changes the display from a bar graph to a moving. LED current drive is regulated. it’s needed for current limiting resistors. This circuit can operate from a single supply minimum of 3 Voltage or a maximum of 25 Voltage. The input buffer accepts signals down to the ground and up to within 1.5 Voltage of the positive supply it needs no protection against inputs of ±35 Voltage. The audio input stupid drives 10 separate comparators referenced. Accuracy’s better than 1 dB. The LM3915’s 3 dB/step display is suited for signals. such as audio level, power, light intensity. Audio includes average or peak level indicators. Replacing usual meters with an LED bar graph results in a faster responding.
The LM3915 is extremely easy to use. A 1.2V full-scale meter demands only one resistor in addition to
the last which means ten LEDs. LED brightness is easy can control
with a single pot.
LM3915 ic is the best ic for this music-level circuit.
The LM3915 is very multipurpose. The outputs can drive LCDs, incandescent bulbs
as well as LEDs. LM3915s can also be cascaded with LM3914s.
Description of LM3915:
Power Dissipation = 1365 mW.
Supply Voltage =25V.
voltage on Output Drivers = 25V.
Input Signal Overvoltage =±35V.
Divider Voltage=−100 mV to V+.
Reference Load Current=10 mA.
Storage Temperature Range=−55°C to +150°C.
Lead Temperature (10 sec)=260°C
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