How to make 40 levels VU METER LED without IC
I show You DIY video "How to make 40 levels LED VU METER without using IC".
Don't worry if you don't have electronic skills yet. Just write or show this video into electronic spare-part store shopkeeper when You buy that all components needed, then follow again the step-by-step how to make it on this video when You already in your home.
Sometimes to build the circuit like this we need 4 or more ICs such as LM3914 or LM3915 or LM3916, but not using the IC in this video.
The idea of making a VU meter has been on my project list for a long time. And finally I can make it now.
The VU meter is a circuit for an indicator of the audio signal strength. The VU meter circuit is usually applied to an amplifier circuit so that the level of audio power can be determined by certain parameter settings which will be displayed in the form of light from the LED.
The number of LEDs used for indicators varies depending on the manufacturer. For the VU meter that I made, I used 20 LEDs. To make it more interesting, I divided my led colors into 3, namely 12 green, 5 orange, 3 red.
The video gives you all the information you need to build this project. But in the next steps you can find a parts list, schematic and reference pictures for your convenience.
Of course, what is needed to make this project is an electronic component. And below are the components needed along with a little explanation:
2* IC 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 regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V.
1*IC LM358
LM358 is a dual op-amp IC integrated with two op-amps powered by a common power supply. It can be considered as one half of LM324 Quad op-amp which contains four op-amps with common power supply. The differential input voltage range can be equal to that of power supply voltage. The default input offset voltage is very low which is of magnitude 2mV. The typical supply current is 500uA independent of the supply voltage range and a maximum current of 700uA. The operating temperature ranges from 0˚C to 70˚C at ambient whereas the maximum junction temperature can be up to 150˚C. In this circuit, I use the LM358 op-amp to raise the audio signal level.
20*LED
In simple terms, LEDs are electronic components that can emit light. In this circuit I use the LED to display the audio signal strength level.
1*Mic
There are two sound sources for the VU meter that I made. The first comes from the music amplifier input and the second comes from the Microphone. By using a microphone vu meter can measure the audio signal that comes from the surroundings, for example, human voices and so on
1*Trimpot
trimpot including variable resistor type. In this circuit I use it to control the audio signal from the microphone to the LM3915 IC input
1*PCB
PCB has an important role in this project. PCB is used as a place for components and circuit lines. So that the VU meter can work as desired. For the process of making PCB I will explain in the next step
Pasif Componen
An IC sometimes requires supporting passive components such as resistors and capacitors. Including IC LM3915 and LM358 which require passive components. The following is a list of the passive components used: - 2*100n, - 5*2k7, - 2*0R. - 2*470uF
Cable
Several cables are needed to connect the audio input and the VU meter module
To make PCB 2 layer PCB with good quality. I use PCBWay services to make a 2 layer PCB for this VU meter project. You can see the finished 2 layer PCB in the image above.
How to make 40 levels VU METER LED without IC
I show You DIY video "How to make 40 levels LED VU METER without using IC".
Don't worry if you don't have electronic skills yet. Just write or show this video into electronic spare-part store shopkeeper when You buy that all components needed, then follow again the step-by-step how to make it on this video when You already in your home.
Sometimes to build the circuit like this we need 4 or more ICs such as LM3914 or LM3915 or LM3916, but not using the IC in this video.
The idea of making a VU meter has been on my project list for a long time. And finally I can make it now.
The VU meter is a circuit for an indicator of the audio signal strength. The VU meter circuit is usually applied to an amplifier circuit so that the level of audio power can be determined by certain parameter settings which will be displayed in the form of light from the LED.
The number of LEDs used for indicators varies depending on the manufacturer. For the VU meter that I made, I used 20 LEDs. To make it more interesting, I divided my led colors into 3, namely 12 green, 5 orange, 3 red.
The video gives you all the information you need to build this project. But in the next steps you can find a parts list, schematic and reference pictures for your convenience.
Of course, what is needed to make this project is an electronic component. And below are the components needed along with a little explanation:
2* IC 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 regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V.
1*IC LM358
LM358 is a dual op-amp IC integrated with two op-amps powered by a common power supply. It can be considered as one half of LM324 Quad op-amp which contains four op-amps with common power supply. The differential input voltage range can be equal to that of power supply voltage. The default input offset voltage is very low which is of magnitude 2mV. The typical supply current is 500uA independent of the supply voltage range and a maximum current of 700uA. The operating temperature ranges from 0˚C to 70˚C at ambient whereas the maximum junction temperature can be up to 150˚C. In this circuit, I use the LM358 op-amp to raise the audio signal level.
20*LED
In simple terms, LEDs are electronic components that can emit light. In this circuit I use the LED to display the audio signal strength level.
1*Mic
There are two sound sources for the VU meter that I made. The first comes from the music amplifier input and the second comes from the Microphone. By using a microphone vu meter can measure the audio signal that comes from the surroundings, for example, human voices and so on
1*Trimpot
trimpot including variable resistor type. In this circuit I use it to control the audio signal from the microphone to the LM3915 IC input
1*PCB
PCB has an important role in this project. PCB is used as a place for components and circuit lines. So that the VU meter can work as desired. For the process of making PCB I will explain in the next step
Pasif Componen
An IC sometimes requires supporting passive components such as resistors and capacitors. Including IC LM3915 and LM358 which require passive components. The following is a list of the passive components used: - 2*100n, - 5*2k7, - 2*0R. - 2*470uF
Cable
Several cables are needed to connect the audio input and the VU meter module
To make PCB 2 layer PCB with good quality. I use PCBWay services to make a 2 layer PCB for this VU meter project. You can see the finished 2 layer PCB in the image above.
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