My Sound Level Indicator project

[audioguru2]

I don't believe it.
Two series connected LEDs in my project  http://www.electronics-lab.com/projects/motor_light/002/index.html don't work anymore. They are the second-lowest ones so they have been turned on most of the time at about 25mA for nearly 6 years.

I thought the LM3915 driver IC had failed but no, one LED is now open.
It is an American Name-Brand LED, not a cheap one from China.
Luckily I have a bag full of them.
The replaced LED works perfectly.

 

[0Danielwright0]

I am trying to make your project for part of my electronic course at college and I was wondering if you have any electronic versions of the information

Thanks
Daniel Wright

 

[audioguru2]

I am trying to make your project for part of my electronic course at college and I was wondering if you have any electronic versions of the information

I designed and made only one circuit over 7 years ago. It still works fine.
My computer and digital camera were brand new and I was still learning how to use them.

Here is the parts layout photo with red "Xs" where each stripboard track was cut and this photo has better contrast.View attachment 41840