One led holds the peak for a while and the other leds are instantaneous. Vu meter with led if you are making a stereo amplifier, or if you own one already, then do not hesitate to add this circuit. Vu meter circuit 40 led electronics projects circuits. The lm3916 the lm3915 is the logarithmic version of the lm3914. Analog panel vu meter driver audio level stereo with peak led indicator board module pcb fully assembled unit board only but without the analog vu meters no meters this is myboard to drive two analog vu meters. Best value led vu meter great deals on led vu meter from. This vumeter reacts to sound fedin the rca jacks at the back of the unit and. Stereo vu meter with 2 x 10 leds dot or bar indicator and an adjustable input.
All i am saying it that the working range of the input of the vu meter circuit must be consistent with the signal you are feeding it. Over threshold led illuminates when input audio crosses the set threshold. Premium stereo vu meters show selectable input or output. Browse over 30,000 products, including electronic components, computer products, electronic kits and projects, robotics, power supplies and more. Within the integrated circuit lm3914 is a voltage range advantage. Spare parts only 2 pcb boards for 120 led stereo vu meter sgvul120. Vu meter circuit lm324 op amp based on this circuit a lot of books on the site saw. If you are driving with an ipod, we have the opposite problem, the level is pretty low. Best value vu meter great deals on vu meter from global vu. Nobsound 32 bit mic sound control level indicator led music vu meter light audio spectrum.
Offers the advantage of fast response compared to older style analogue vu. Easy hook up to a line level low input signal source. If you require help choosing the right product for your needs please call us on 01279 467799 or use our contact form. Package contents include 1 front panel suitable for horizontal or vertical mounting. Stereo led vu meter 2x 10 leds 10v 15v k4305 velleman bausatz. Then an rc discharge time fast enough so that 50hz is still accurate. The sensitivity of each channel is adjustable independently. I have looked all over for a diagram and have found none.
It is designed to cover common carradio output power ranges, but can easily be modified to suit different needs. Circuit needs symmetric 12v power supply because of the lm324 opamp. The entire circuit is wired around ic4017 whose clock input is tapped through transistor bc107. Do not connect the unit to a high power car booster or car stereo, this equipment uses isolated ground connection. You can adjust the input amplitude by using the multiturn 50k linear potentiometer pot1. This circuit senses ac audio voltage supplied to the carradio loudspeakers and displays it as power using a led bar graph, achieving at the same time an attractive visual effect.
Perhaps it is strange how i can control the 64 leds with i o pins. Aug 28, 20 diy stereo vu meter with 80 leds circuit and pcb layout a video response som. Each pcb holds all the leds, the analog and digital segments of the circuit and only handle one audio channel. It would be good to make a vu meter like those on stereos. These audio vu meter have been tested to run on windows 2008 r2 which is the os that i am currently using. Stereo vu meter with 2 x 15 leds dot or bar indicator and an adjustable input. Apr 06, 2020 here is highperformance lm3914lm3915 vu meter circuit projects that can display with 20 leds on stereo or mono with 10 leds for all audio system. All the creative usb sound blaster sound card that i have is able to work with the 5 audio vu meter software that is listed below. May 24, 2012 are you driving the vu meter circuit off the speaker wires, if so, you can expect 20 volt peaks.
Velleman k4305 bausatz stereovumeter 2x10 leds 840121 2. I am used to seeing a vu meter that holds the peaks long enough to see them, about 40ms. Oct 09, 2019 10 leds vu meter circuit using lm3914. With color effect at its disposal, leds became the hot favorites as far as vu meter were concerned, even today amplifiers employ a led vu graph for displaying the music power in an amplifier. Reference voltage pin 6 is low, and the reference voltage divided up. There will be 40 leds, 80 in stereo version, and if 10 ma of current flows through each. That way you can build a stereo vu meter just by using two instances of this circuit which can be mechanically stacked together. The vu meter operates from a single supply as low as 3v or as high as 6v. Feb 25, 2012 this is my another vu meter with 80 led diodes. A vu metre is volume unit vu meter or standard volume indicator svi is a device displaying a representation of the signal level in audio equipment.
This project is a 160 led stereo vumeter, with 80 led per audio channel. Vu meter also serves as a volume measurement device. A small printed circuit board has been designed to allow a stereo version of the power indicator to be built. Vumetre a 20 led et 2 lm3915 astuces pratiques schema. The 12vdc car battery power or car radio antenna output can be used to supply the vu meter.
Oct 06, 2011 i need tons of leds for a massive vu meter. For use with mixing panels, amplifiers, cd players, radios. This 8 led vu meter circuit can be used to display the variation of an audio signal in a group of 8 leds, behaving like a vu meter. Discover over 2645 of our best selection of electric meter three, lcd display lcr esr meter, car humidity. Diy kit not assembled 120 led stereo vu meter sgvul mixed colors. Vumetre a 20 led et 2 lm3915 astuces pratiques avec images. Meter based on two an6884 integrated circuits that ensure a high input sensitivity. It is supplied from the 12 v car electrical system and is suitable for classical cc capacitorcoupled. Schematics in orcad format, postscript format and pdf. Vu meter circuit lm324 op amp based on this circuit a lot of books on the site saw ready vu meter integrated when there is much interest repellent, but this app is also 40 leds use and eagle prepared by the pcb drawing the lack of work is changing writers the same circuit 2 have made a total of 80 led vu meter prepare the project in two stereo operation with all leds illuminated circuit 12v 2.
The spl meter mode shall include switchable a or cweighting filters. Vu meter circuit lm324 op amp based on this circuit a lot of books on the site saw ready vu meter integrated when there is much interest repellent, but this app is also 40 leds use and eagle prepared by the pcb drawing the lack of work is changing writers the same circuit 2 have made a total of 80 led vu meter prepare the project in two stereo. Here is highperformance lm3914lm3915 vu meter circuit projects that can display with 20 leds on stereo or mono with 10 leds for all audio system. Simple led vu meter circuit homemade circuit projects. The maximum supply current at full scale is about 350m c3, r4, r5 and c5, r9, r11 adjust the rise and fall time for the l and r audio channel, respectively, acting as integrators.
Vu meter electronic project kits modules quasar electronics. Sound blaster e1, sound blaster play, sound blaster digital music premium hd, sound. Diy stereo vu meter with 80 leds circuit and pcb layout. Vu meter circuit 40 led electronics projects circuits 320volt. Connect vu meter s ground to your amplifiers ground. Now i am going to instruct how to make a vu meter using arduino with less number of components. Lieferung an abholstation eur 29,73einheit kostenloser versand. Led vu meter circuit diagram using lm3914 and lm358. Capacitor c1 is required if leads to the led supply are 6.
Offers the advantage of fast response compared to older style analogue vu meters. Vu meter uses formula 20logvv0 and power meter formula 10logvv0. Analog vu meter stereo driver audio level with peak. The connection to this kind of amplifier can cause permanent damage to the amplifier or car radio. A vu meter s relatively slow attack 300 ms from infinity to 0 db vu averages out many of the short peaks, resulting in a more realworld expression of dynamics. Lm3915 dotbar display driver experimentalists anonymous. Which wire is the rightone, can be found experimentally. You can use the product filters below to narrow the selection. In one channel is used 10x io lm324, connected like voltage comparator, 40 led diodes and. Maybe the meter could be used as a power meter in a power amplifier. A vu meter is slow by design, as is human hearing, which behaves more like a vu meter than a peaklevel meter.
Then, connect c8 and c2 capacitors vu meter s inputs at your left and right speaker terminals, respectively. This electronic vu meter set is a circuit that high performance and widely popular than 40 years i made a lot of amplifiers. You get pcb fully assembled and tested unit but without the,analog vu meters. The lm 3916 is an integrated circuit ic that takes analog voltage levels and drives 10 leds, lcds, or vacuum fluorescent displays to represent digital voltage levels just like a vu meter. We could use an specific integrated circuit used for vu meters, but we decided to use a readily available integrated circuit. Discover over 750 of our best selection of digital vu meter, analog vu meter, audio led level meter, audio level on aliexpress.
A compact stereo vu meter based on two an6884 integrated circuits that ensure a high input sensitivity. Diy stereo vu meter with 80 leds circuit and pcb layout a video response som. A special input high input is provided, which allows direct connection to a speaker output. This electronic vu meter set is a circuit that high performance and widely popular than 40 years. Linear meter would have been easy to make, but a real vu meter has to be logarithmic. We have also built a volume meter or vu meter, with the help of mic, opamp and lm3914, which glows the leds as per strength of the sound, if sound is low, lesser leds will glow, and if sound is high more leds will glow, check the video at the end. This is a quick howto guide for making a stereo vu meter using the lm3915lm3916. The ruasx4dr was designed for silent switching of audio signals using only solidstate switching circuitry.1520 828 1272 140 352 977 546 92 681 1276 61 1244 634 1089 1235 381 1006 189 422 50 398 1461 1520 606 11 600 1135 574 164 40 233 105 1046 415 1494 1385