Like moving needle, you dimmed. Unfortunately they will run backwards from what you want if used with my board. Welcome to our website: Important- install bargraph array before U1. At the moment they are sold out, and more are expected in two weekes or less. We can do all kinds of sizes of 7 segment led display or OEM the product you need that can certainly suit your product,and can give you the best price.

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First — when one column lights up the adjacent columns also significantly lights up.

LED VU Meter with LM3916

The solution here was to rasp the top side of the LEDs with rough file, so the light to diffuse more mster. The max input voltage of the LM is set to 1. The output mode can be set with 3-pin jumper JP1. We specialized in 7 segment led display,led diode,led dot matrix and other electronic components,and we have in this line for rich experience and win popular market.

Leave a Reply Cancel reply. TI LM block diagram. So in the end there is no three-color bar meter that I can use for vu applications?

LED VU Meter with LM – Electronics-Lab

This fits various battery monitoring applications better. In the absence of a signal gen, an audio output from a computer can be used. A signal coming in then determines how many signals are lit.


Scale things down a bit more or possibly diode clamp to an appropriate rail? It can run off higher voltage say 12V but there will be more power dissipation in the chip something like a 30C rise above ambient.

Front view- all parts except the display are on the back. The power dissipation in the chip is mrter The color of the LEDs is your choice. The abs max supply is 25V for the chip, but you have to keep in mind power dissipation inside which is a function of LED drive current and number of LEDs on at any moment.

I am not very familiar with peak hold operation though. The LM can be feed with AC signal without any rectification, but I wanted to implement a precision full wave rectification.

LM3916 LED bargraph/ VU meter

Make sure to pay attention to silk screen markings. I would know if it could be possible to make it working with a bargraph of 5 leds? If you use blue LEDs 2. Second drawback is that because of the transparency, the LEDs emit light from one point, which is not very pleasant. Also is there any easy way to hold the peak LED level light for a second?


The most controlled and convenient test signal source is a good signal generator. There are several unusual steps in these instructions, so please make sure you read them before building the kit!

Important- carefully trim display pins after soldering. Assembled board in testing.

There also can be used a black tape around the entire collumn. The minimum positive rail voltage depends on the voltage of the LEDs. Meted in doubt- square pad is always pin one on my boards. All I needed I found in dispoay datasheet of LM The schematic needs bipolar power supply to work correctly, but the negative rail can be as low as -5V or even Unfortunately they will run backwards from what you want if used with my board.

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