Lm3914 3915 3916

Thread Starter

aespino88

Joined Mar 31, 2010
41
if i knew how to do that i wouldn't be asking on a circuit forum, would i???

on the videos i seen they talk about a dot something to change the effect of the vu meter, is that a separate component or like a switch???
 

SgtWookie

Joined Jul 17, 2007
22,230
They are dot/bar display drivers. You can select which mode, dot or bar, by how you wire it up. You can also get interesting combined effects, depending on how you wire it.

The LM3916 was designed to be a 10-LED VU meter display driver.
However, if you want to go to 12 LEDs, then use two of the LM3915 drivers, as the LM3916 does not work well when cascaded.
 

retched

Joined Dec 5, 2009
5,207
There is a circuit in the datasheet for using a ML3915 and LM3916 together to get the desired result.

And as the Sarge said, there is a mode pin that determines dot or bar.

Dot is where a single led jumps up and down the meter, usually leaving a dot at the peak for a second or so.

The bar, fills the meter from bottom to peak.
 

Bychon

Joined Mar 12, 2010
469
The way to find data sheets is to go to manufacturers website or sellers website and type in the part number in the search box. Parts that start with "LM" are made by National Semiconductors. My favorite site for data sheets is www.mouser.com because the search box jumps up on the first page at the top. Very easy to find.
 
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