![]() ![]() ![]() One pin changes the display from a bar graph to a, responding electronic VU meter Drivers LEDs, LCDs, or vacuum fluorescents Bar or dot display mode, Meter DS007971-1 Notes: Capacitor C1 is required if leads to the LED supply are 6" or longer, high resolution VU meter and the expanded range VU meter circuits (see Typical Applications). Text: dB difference between LED #11 and LED #12 Extended Range VU Meter (Dot Mode) DS007971, an electronic version of the popular VU meter. LM3916 10-step LM3916N-1 18-lead ] VU meter CIRCUITS LM3916 VU METER led driver 12v only circuit diagram VU METER LED BAR" driver graph lm3914 spice 20 led VU meter common cathode in audio VU METER 6 VU peak hold LF353 as precision rectifierĪbstract: 20 led VU meter common cathode in audio 20 led VU meter transistor VU METER 32 led lm3916 vu meter lm3915 vu meter VU meter CIRCUITS 20 led VU meter VU-METER 20 led VU meter stereo LM3916 VU METER 20 led VU meter transistor lm3914, lm3915, lm3916 IC lm3916 12v AC to DC CIRCUIT DIAGRAM for led tube lights 20 led VU meter VU METER LED BAR" driver graph NPN Transistor DRIVER for lm3914 lm3914 spiceĪbstract: LM3916 VU METER led driver 12v only circuit diagram VU METER LED BAR" driver graph lm3914 spice 20 led VU meter common cathode in audio VU METER 6 VU peak hold LF353 as precision rectifier Examples include the high resolution VU meter and the expanded range VU meter Features n n n n n n n n n n n n Fast responding electronic VU meter, Typical Applications 0V to 10V VU Meter DS007971-1 Notes: Capacitor C1 is required if leads to the, higher device are not used. Text: Typical Applications Extended Range VU Meter (Dot Mode) 16 DS007971-22 This, , LCDs or vacuum fluorescent displays, providing an electronic version of the popular VU meter. Text: scalebar level meter 5-point LED VU scale bar level meter 5-point LED linear scale bar level meter 5-point LED VU scale bar level meter 5-point LED VU scale bar level meter 5-point LED VU scale bar fevel meter 8-point LED linear scale bar level meter 12-point fluorescent display tube VU scale bar level meter 12-point fluorescent display tube VU peak hold level meter 12-point LED power scale dot/ bar level meter 12-point LED VU scale dot/ bar level meter 12-point LED power scale dot/ bar level meter 12ĭD03252 BA695 BA685 BA6104 BA6124/BA6124F BA612S BA6137 BA6144 BA6154 BA684Ä 20 led VU meter transistor VU METER 32 led 50 led VU meter ba3706 16 led VU meter ic level audio meter BA684A SLO 365 R Peak level meter icĪbstract: 20 led VU meter transistor lm3914, lm3915, lm3916 IC lm3916 12v AC to DC CIRCUIT DIAGRAM for led tube lights lm3916 20 led VU meter VU METER LED BAR" driver graph NPN Transistor DRIVER for lm3914 lm3914 spice Q1-Q20: 2SC458, 2SC828,C945,C1815, 45V 0.16 led VU meter Datasheets Context Search Catalog DatasheetĪbstract: VU METER 32 led 50 led VU meter ba3706 BA612S 16 led VU meter ic level audio meter BA684A SLO 365 R Peak level meter ic The current drawn from it depends largely on the number of LEDs that light: it is not more than 160 mA at 10V and 110 mA at 15V If D3 and D4 are red, the circuit may be used as a simple peak indicator, showing when the input signal exceeds a certain value. ![]() The higher the input signal, the more LEDs will light. When the voltage level at the positive input of an opamp rises above that at the inverting input, the output of that opamp goes high and the associated LED lights. Resistors R1 and R12 ensure that the reference voltages are higher than half the supply The non-inverting input of each opamp is supplied with the rectified input signai (D1 and D2), which is also superimposed on to half the supply voltage. The values of these resistors are chosen to give a 5 dB step between adjacent resistors. The inverting input of each of the opamps is provided with a reference voltage derived from potential divider R3-R10. The meter shown in the diagram is based on eight opamps, contained in two Type LM324 chips, which function as comparators. Although there are several ICs on the market with which it is quite simple to construct an LED VU meter, there is, no doubt, still interest in building such a meter from discrete components.
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