
20 dB Vu meter Circuit LM3916
LM3916 Vu meter Circuit Indicator rna 10-point reading field made of LEDs. The diodes were scaled in dB, transmitting irn, from D4 to D13, respectively, the following weights: -20 dB, -10 dB, -7 dB, -5 dB, -3 dB, -1... Electronics Projects, 20 dB Vu meter Circuit LM3916 "led projects, " Date 2020/04/28
LM3916 Vu meter Circuit Indicator rna 10-point reading field made of LEDs. The diodes were scaled in dB, transmitting irn, from D4 to D13, respectively, the following weights: -20 dB, -10 dB, -7 dB, -5 dB, -3 dB, -1 dB, 0 dB, +1 dB, +2 dB, +3 dB.
The LED indicator may work in line or spot mode. It is selected by placing the MODE jumper. If she is compact, the meter works in line mode. If open, in point mode. The input signal is led to the In input through
C3 capacitor and R5 resistor. Then it is fed to the peak detector input made of D1 and D2 diodes, PR1 potentiometer and U2 operational amplifier. Using potentiometer PR1 you can adjust the amplitude of the output voltage sciowego. Detector input resistance it’s big, so it doesn’t overload the signal source too much.
The assembly diagram is shown in Figure 2. After assembly, the only required regulatory action
is the calibration of the detector. The 0 dB level is assumed to be 0.775 V (0 dBu). In order to
calibration should be at the input of constant voltage 1.1 V (more precisely: 1.096V), and then
set the PR1 potentiometer LED D13 (+3 dB) is on. There are source LM3916 vumeter pcb drawings prepared with Eagle cad (board and LED Panel)
LM3916 Vu meter Circuit Schematic Diagram
FILE DOWNLOAD LINK LIST (in TXT format): LINKS-26539b.zip
Transistor Power Supply 13.6V 22 Amp TIP142
Power supply Circuit is very powerful and simple design has regulated for 6 TIP142 transistor used transistors fin cooler on the mounted 2 x 12v fan cooling provided transformers used output 17VAC will power the 350w DC rectifier solid 35 amps metal bridge diode is used filter capacitor for 11 in addition to used 4700uF 25v fan control node’s author in the circuit to operate using radio to power 22 could also constantly told .. A chart of 13.6V 22A power supply, pcb layout drawings there