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VU METER 5 UAA180

2017-12-21 02:23  
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VU Meter 5 with UAA180

VU_Meter_5.gif (13146 bytes)

 ???? ?? ??????? ???????? ??????? ???????????? ?? ???????????? UAA180 ??? SIEMENS ??? ??? ??????? ????????? ?????????, ???? ??? ?? IC2?. ? ??????????? ???? ????? ?? ?????? ??? 3db ??? ?? ??? Led ??? ???? ??????????????, ??? ???? ???? ??????? ?????????, ???? ??????? ??? ???????????? ?????????? ???????. ?? Led ??????? ?? ????? ?????????, ???? ???? ???????????? ?? ??? ????? ??? ???? , ?? ?????? ??? ?????? ??? ??????, ????? ????. ?? ???? ???????? ??? ??????? ?? ??????? ????? , ? ???????? ?? ?????? ????? ? ????? ??? ????????????? ???? ???????? ?????.

  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.

Part List

R1= 47KohmR7=2.2KohmD1....8= LED GREEN
R2= 1MohmR8-10=330KohmD9-10= LED YELLOW
R3= 33KohmR11=180KohmD11-12= LED RED
R4= 10KohmC1= 47uF 25VD13....17= 1N4148
R5= 220ohmC2-4=47nF 100VIC1=UAA180
R6-9=390ohmC3=2.2uF 25VIC2=TL072

All the Resistors is 1/4W 1% metal film

 

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