Vu-Meter 20 LED DIY Dot/Bar mode with LM3915 and LM386
This is the "Perfect Vu-Meter" The best I've ever made. A Vu-Meter with 20 LEDs, two LM3915 and an integrated LM386 amplifier, it is also possible to connect a stereo signal to the input, and a graphical view with dot or bar mode.. This circuit is equipped with an audio transformer (TTC-167) that allows to separate the amplification circuit of the signal from the measurement one.. LM7809 takes care to keep the 9V voltage stable throughout the circuit.
► Features:
20 LEDs with *standard color scale
LM3915 as LEDs driver
LM386 as Amplifier
167-TTC Audio Signal Transformer
Stereo Input (Low Level from RCA)
Adjustable Gain
LED Test button
DOT & BAR mode
230V Power Supply
*The standard color scale for a Vu-Meter is: 10 Green LEDs, 6 Yellow LEDs and 4 Red LEDs.
Correct Electric Diagram: [EDIT 5 Ago 2018] - http://bit.ly/2EvjgjB
In the video diagram the 1K resistor on LED 9 must be connected to the cathode (not anode) download the correct diagram from the previous link.
PhotoSlide at: 5:25
Here I entered a Poll in the video ( 2:05 ) Please answer =)
► Components List:
● 2x LM3915 [ https://goo.gl/QWDhwu ]
● 1x LM386 [ https://goo.gl/WJZck1 ]
● 1x LM7809 [ https://goo.gl/2GCay4 ]
● 3x 1KΩ Resistor
● 3x 330Ω Resistor
● 3x 2,7KΩ Resistors
● 2x 10KΩ Resistors
● 2x 100KΩ Resistors
● 19x 120Ω Resistors
● 1x 1Ω Resistor
● 1x 50KΩ Trimmer
● 1x 2.5KΩ Trimmer
● 2x 1uF @ 25V Electrolytic Capacitors
● 2x 100uF @ 25V Electrolytic Capacitor
● 1x 470uF @ 25V Electrolytic Capacitor
● 1x 10uF @ 25V Electrolytic Capacitor
● 1x 100nF Capacitor
● 3x 1N4007 Diode
● 1x Audio Transformer TTC-167 [ https://goo.gl/doW21m ]
● 10x Green LEDs
● 6x Yellow LEDs
● 4x Red LEDs
● 2x LEDs any color as power LEDs
● 1x Switch (for Dot/Bar Mode)
● 1x Switch (for Leds test)
● 1x DIP 8 Pin
● 2x DIP 18 Pin
● 2x Heatsink for IC LM3915 [ https://goo.gl/2MkKTM ]
● 1x Heatsink for LM7809
● 2x Female RCA
● 1x Box TEKO AUS12 [ https://goo.gl/vSxWHA ]
● 1x PSU 12V@1A [ https://goo.gl/nrKKzR ]
● 1x On/Off Switch (for 230V)
● 1x 230V Connector [ https://goo.gl/ameKXP ]
● 1x fuse holder (for glass fuse)
● 1x Glass fuse 500mA
● Stripboard
● Thermal paste [ https://goo.gl/kd2Uu6 ]
● 1x LED Socket [ https://goo.gl/MVVYe6 ]
► Similar videos:
The Perfect Vu-Meter Breadboard: • Vu-Meter with 20 LEDs with LM3915 - LM386 ...
Vu-Meter LM3915+LM386: • Vu-Meter LM3915 + LM386 + TTC-167 with 20 LED
Vu-Meter 20 LED: • Vu-Meter 20 LEDs with LM3915 (Standard LED...
Vu-Meter 100 LED: • Vu-Meter 100 LED with 10x LM3915 - DIY
EMF Meter Detector: • EMF Meter detector DIY | how to make it
► Music:
Vexento - Devotion (Intro)
Vexento - Return Of The Heroes (Test)
Vexento - Digital Kiss (Photo slide)
► More videos: / stefano91ste
WARNING: This video is only for demonstration. I don't take any responsibility for damage to things, people and animals.
► My equipment:
Panasonic HC-V180 (Main Camera)
iPhone 6 (Secondary Camera)
#ElectronicProjects #VuMeter #LM3915