Hi,
I am build a VU meter using the LM3915.
My base circuit is this: http://electronics-lab.com/projects/motor_light/002/index.html
Now I'm trying to add the circuit "Full-Scale Changes Display from Dot to Bar" on Figure 18 of datasheet.
When LED 10 light up, all others LEDs should light up too.
In my circuit it doesn't work.
I'm using the BC558 PNP transistor and LM4148 fast diode. 9V supply.
Any idea why it's not working?
Thanks in advance.
acemax
I am build a VU meter using the LM3915.
My base circuit is this: http://electronics-lab.com/projects/motor_light/002/index.html
Now I'm trying to add the circuit "Full-Scale Changes Display from Dot to Bar" on Figure 18 of datasheet.
When LED 10 light up, all others LEDs should light up too.
In my circuit it doesn't work.
I'm using the BC558 PNP transistor and LM4148 fast diode. 9V supply.
Any idea why it's not working?
Thanks in advance.
acemax