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Hi, I'm new here and I hope I put this in right thread.
I need some help with one DIY project (it's more practice than something useful) of mine.
Well, I would like to make small power meters for my speakers, I must say that it's not for any kind of professional use or home Hi-Fi use, it's for fun (light effect) and it should tell me approx. what power is amplifier outputting in that moment. I found one scheme that is excellent for my project, well, at least some part of it is excellent cause I need more LED's and they should blink at lower power.
I don't want classical VU meter because it measures input signal and not output power and real clip detectors are much complicated.
Here is scheme and part list:


As you can see, it needs no additional power supply because it's connected in parallel with speaker directly on amplifier.
LED's should blink when power is high enough.
D6 10W
D5 25W
D4 50W
D3 100W
D2 150W
I made this (it's my first DIY el. circuit) and it works (as far I can see at leas because 10W is very loud and I can't turn the volume up enough for now but D6 blinks a little on level I think is around 10W so my assumption it that circuit works ok).
I must say that there is no noticeable power loss and no degradation in sound quality.
Problem is that I want more LEDs and some of them to blink on lower power. I would like 5 10LED meters, two for front speakers, two for rear, and one for subwoofer.
For fronts I want approximately these power levels:
150W
75W
40W
20W
10W
5W
1W
0,5W
0,2W
0,05W
For rear I want this:
80W
40W
30W
20W
10W
5W
1W
0,5W
0,2W
0,05W
And for subwoofer this:
500W
250W
100W
50W
25W
10W
2W
0,7W
0,2W
0,05W
I'm interested must I change values of R1, R2, C1 and D1 (and what would they be for my meters) if I want to add more LEDs (and more power for subwoofer) and what should be values of other resistors for power ratings I want (if someone can explain me how to calculate resistor value for expected effect, i tried with standard ohm law equations but I confused myself more than I was before so example would be nice :R).
I imagined it to look something like this:

These are the speaker and reciver/amp if that means anything, as you can see, all speakers are DIY and power rating are approximately 50-60W for fronts, 30W for rears (smaller box) and 250W for subwoofer. They don't stand like this usually
, it was just for testing is everything working.

Please help me calculate values of components for power meters I want or tell me how to do it myself couse i really want to see this LEDs blinking like I imagined
:help:
Thanks in advance.
I need some help with one DIY project (it's more practice than something useful) of mine.
Well, I would like to make small power meters for my speakers, I must say that it's not for any kind of professional use or home Hi-Fi use, it's for fun (light effect) and it should tell me approx. what power is amplifier outputting in that moment. I found one scheme that is excellent for my project, well, at least some part of it is excellent cause I need more LED's and they should blink at lower power.
I don't want classical VU meter because it measures input signal and not output power and real clip detectors are much complicated.
Here is scheme and part list:


As you can see, it needs no additional power supply because it's connected in parallel with speaker directly on amplifier.
LED's should blink when power is high enough.
D6 10W
D5 25W
D4 50W
D3 100W
D2 150W
I made this (it's my first DIY el. circuit) and it works (as far I can see at leas because 10W is very loud and I can't turn the volume up enough for now but D6 blinks a little on level I think is around 10W so my assumption it that circuit works ok).
I must say that there is no noticeable power loss and no degradation in sound quality.
Problem is that I want more LEDs and some of them to blink on lower power. I would like 5 10LED meters, two for front speakers, two for rear, and one for subwoofer.
For fronts I want approximately these power levels:
150W
75W
40W
20W
10W
5W
1W
0,5W
0,2W
0,05W
For rear I want this:
80W
40W
30W
20W
10W
5W
1W
0,5W
0,2W
0,05W
And for subwoofer this:
500W
250W
100W
50W
25W
10W
2W
0,7W
0,2W
0,05W
I'm interested must I change values of R1, R2, C1 and D1 (and what would they be for my meters) if I want to add more LEDs (and more power for subwoofer) and what should be values of other resistors for power ratings I want (if someone can explain me how to calculate resistor value for expected effect, i tried with standard ohm law equations but I confused myself more than I was before so example would be nice :R).
I imagined it to look something like this:

These are the speaker and reciver/amp if that means anything, as you can see, all speakers are DIY and power rating are approximately 50-60W for fronts, 30W for rears (smaller box) and 250W for subwoofer. They don't stand like this usually

Please help me calculate values of components for power meters I want or tell me how to do it myself couse i really want to see this LEDs blinking like I imagined
Thanks in advance.