VU 19 LEDS

Hi.

I don't have LM3915. Can I use LM3916 instead? I mean 4 chips of LM3916.
I'm interested in a bar VU.

Thanks.

Alberto

I have a better idea for you forget that device for now How many do you need 19 led’s 2 * 8 = 16 and 1* 3

18 different levels 0- 18 = 19 leds

Lets start to use modern technology Lets opt for a pic16f672 instead and use the onboard ADC module 10 bit resolution and lets convert input voltage to DC via an op amp acting as a buffer to scale the input voltage from your max in via two resistors, buffer it and run this through a diode network to get rms voltage

Lets then insert this into the IC ADC port a input and perform adc 10 bit resolution

So divide you 19 levels for five volts in max to give you voltage per step and then calculate what your resolution is

Followed by some C or basic programming to give you one chip reprogrammable using modern techniques instead of cascading Lm3916 to do the same

Use an internal RC Oscillator no clock out all digital settings

Perform adc then output result to port a port b port c depending on value

How about that for a challenge for you

Much better than cascading three ic to do the job one ic can do Also you then learn at the same time digital theory how analogue to digital conversion works plus programming the device and more importantly you keep up to date with modern technology

Got to be better hasnt it what do you think about this then