Photo of power supply 15V
To use the power supply circuit as shown in Figure 3.2 is commonly used circuits using voltage regulator type 7815 and 7915 to obtain a stable voltage at ± 15 V.
Photo of VU LED Display
VU LED Display
Once the design is complete then the graphic equalizer to give the impression of more interesting will be added a LED VU display with LED indicators on the front panel. The shape of the LED VU display graphic equalizer on the front panel like the following picture:
Circuit of VU LED Display
LED display is set with a series of already existing in the market are LED VU display SG003C type because in this final topic only designing and building a 31 band graphic equalizer with no VU display design. LED VU display circuit using IC LB 1403N with the following form:
Photo of VU LED Display
Of the circuit will be analyzed on how much voltage each LED will light. The amount of voltage can be seen in the following table:
Table of VU LED Display