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Schematic Circuits

UAA180 12 Led Vu Meter

This circuit of measurement of level uses the UAA180 of SIEMENS and a circuit of rectification of precision, round the IC2B. The calibration has become in steps 3db from the one Led in the other, ensuring, a very good rate of precision, in the measurement of entering acoustic signals. The Led can be square, thus when they are placed the one by in the other, they give the picture of bar, without space.

12 Led VU Meter UAA180

 

R1= 47Kohm 
R7=2.2K ohm 
D1....8= LED GREEN
R2= 1Mohm
R8-10=330Kohm
D9-10= LED YELLOW
R3= 33Kohm 
R11=180Kohm
D11-12= LED RED
R4= 10Kohm 
C1= 47uF 25V 
D13....17= 1N4148
R5= 220ohm 
C2-4=47nF 100V 
IC1= UAA180
R6-9=390ohm 
C3=2.2uF 25V 
IC2= TL072

Source : http://users.otenet.gr/~athsam/

 


Keywords : UAA180, 12, Led, Vu, Meter
Writer : delon  |
2 Feb 2011 Wed   
|  14.416 Views
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