Six LED stereo VU display circuit built with IC LM3915
Source: InternetPublisher:JFET Keywords: led display circuit LM3915 Updated: 2024/03/04
The figure below is a scheme diagram of a six-LED three-dimensional VU display circuit built using the dot/bar display driver IC LM3915. This VU display should be connected before the amplifier module circuit. You can connect this circuit to a preamp output, tone control input/output, or equalizer input/output. This circuit is powered by 12V DC power supply.
About LM3915:
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 adjustable and programmable, eliminating the need for current limiting resistors.
The LM3915's 3 dB/step display is suitable for signals with a 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 traditional gauges with LED bar graphs allows for faster response, a more robust display and high visibility, while maintaining the ease of interpretation of an analog display.
The LM3915 is very easy to apply. In addition to 10 LEDs, a 1.2V full-scale meter requires only one resistor. An additional resistor sets the full-scale range from 1.2V to 12V, independent of the supply voltage. The brightness of the LED is easily controlled with a single potentiometer.
- One-digit display
- Fire safety evacuation emergency signs
- Working Principle of CCFL and Analysis of Electronic Driving Circuit
- Measurement and analysis of automatic emergency lighting circuit
- LED Signage with RS232 Port Operation Guide
- Use MC1455PIG to make automatic cycle light-emitting diode circuit
- Solar battery and charging circuit
- Lighting lamp voltage stabilizing circuit (2)
- WT8089 holiday lights ASIC
- Remote anti-theft alarm
- Do you know about the YTSwitch-6 LED driver IC with high efficiency and extremely low standby power?
- Circuit diagram of a high-brightness and energy-saving LED lamp cup
- Op amp driving LEDs
- Detailed explanation of ambulance electronic flash signal circuit diagram
- LED backlight driver module design circuit
- Three-phase phase loss alarm light circuit
- Inpatient pager circuit
- Three-phase alternating current detection circuit
- Power outage sound and light alarm circuit
- Paper thickness measurement circuit