Say you run from 12V and use Red leds with 1. Scale things down a bit more or possibly diode clamp to an appropriate rail? The solution here was to rasp the top side of the LEDs with rough file, so the light to diffuse more even. I am not very familiar with peak hold operation though. Important- carefully trim display pins after soldering.

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For this project I bought transparent rectangular LEDs, but they have two drawbacks.

It needs power supply. Depending on the mode selected, either bargraph or a single dot is displayed. The board is set to around mA per LED.

Important- install bargraph array before U1. That segment bar seems to come only on a single color, and I need the three of them. Assembled board in testing. The power dissipation in the chip is then: I metr the schematic on page 13, fig.

If you use blue LEDs 2. A signal coming in then determines how many signals are lit. Leave a Reply Cancel reply. First — when one column bu up the adjacent columns also significantly lights up. If in doubt- square pad is always pin one on my boards.


The minimum positive rail voltage depends on the voltage of the LEDs. The chip is essentially a constant current 10 segment driver fed by an array of comparators. Thanks in advance Michel. Setting up ARB signal generator.

LED VU Meter with LM3916

Ambient was 18C, so the estimates were pretty close. Also is there any easy way to hold the peak LED level light for a second? Neter are several unusual steps in these instructions, so please make sure you read them before building the kit!

The corner with a diagonal cut is pin one. There also can be used a black tape dissplay the entire collumn. Unfortunately they will run backwards from what you want if used with my board.

This site uses Akismet to reduce spam. I would know if it could be possible to make it working with a bargraph of 5 leds?

LMN – LM VU Meter Display Driver

Like moving needle, you dimmed. This fits various battery monitoring applications better. TI LM block diagram. The green LEDs usually have little higher forward voltage — 2.


Something like 5V is ideal. Make sure to pay attention to silk screen markings.

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. 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. The color of the LEDs is your choice. It also provides internal reference voltage to set the rail of the precision resistor network feeding the comparator reference inputs.

The LM can be feed with AC signal without any rectification, but I wanted to implement a precision full wave rectification.