Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

LM3915 VU meter help.

Status
Not open for further replies.

crutschow

Well-Known Member
Most Helpful Member
Is there any voltage across the LEDs?

Is the polarity of the LEDs correct?

What do you mean, everything else works perfectly?
 

LOL_PWND

New Member
Yes, the polarity is correct and yes there is voltage across them.

All the other LED's light up besides the last one.
 

ericgibbs

Well-Known Member
Most Helpful Member
Yes, the polarity is correct and yes there is voltage across them.

All the other LED's light up besides the last one.

hi,
The LM3915 LED's light at 3dB intervals, the Vinput required to step from LED#9 to LED#10 is perhaps not achievable with you microphone.
What voltage do you measure at pin5 of the LM3915 at full drive to the mike.???
 
Status
Not open for further replies.

Latest threads

Top