Learn about and how to use the LM Logarithmic Dot/Bar If you’re wanting to make a VU meter, you should use the LM which we. You’ve saturated the input (SIG, pin 5) above the reference voltage (Rhi, pin 6). That’s why the only the topmost LED flickers in dot mode and all.

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Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Hello, Can I use 9Vdc power supply without doing any modification? In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. You can watch the following video or read the written tutorial below for more details.

Infinity Mirror Music VU Meter Electronics Project using LM3915 IC

For that purpose I used a 5mm tick Styrofoam but a cardboard or something like that can be also used. You’ve saturated the input SIG, pin 5 above the reference voltage Rhi, pin 6.

That would be great. Inside a huge PCB factory: Sign up using Email and Password. So it that way I connected a total of 40 LEDs. For that purpose I used a metallic box from a perfume which was the exactly same size as I needed.

Home Questions Tags Users Unanswered. So if there is anyone that might know whats up with this, it would be much appreciated. Once you are done with this, you should test whether the electronics work properly. The analog signal goes into pin number 5, the pins from 6 to 8 are used for adjusting the voltage reference or the sensing and the pin number 9 is used for selecting Bar or Dot mode. Depending on the quality of the film and the amount of reflection it provides, the light will keep bouncing between the mirror and the glass but at the same time some of the light will escape through the glass.


led – LM VU Meter Not working properly – Electrical Engineering Stack Exchange

This project is based on the LM integrated circuit which can sense analog voltage levels and driver ten LEDs. I would appreciate your support in this way! So, in the housing first goes the filmed glass and on top of it the Styrofoam with lm9315 LEDs.

Check what kind of voltage is there with a multimeter if you can first, or just stick with trial and error. Once we are done with that we also need to solder all wires coming from the LEDs to the circuit board.

This website uses cookies to improve user experience. After inserting all LEDs we need to solder all negative leads together and solder a separate wire to each positive lead. CharlieHanson 1, 4 With a huge spektrum? The input impedance of the is 20k and 12k for theso you might need to fine-tune the cap value to get a better low-frequency cut off.

By using our website, you agree to our use of cookies. Therefore from the other side of the filmed glass you will be able to see the infinity effect. All manner of rectifiers can be found in the lm3195 datasheet, and the goes that bit further with genuine-specification VU-meter circuits. If you look at the SF schematic, they’ve connected a direct adjustable DC source to pin 5, whereas you’re connecting an audio meted that could be: Post as a guest Name. My guess it scenario b. We will start with the electronics part.


Sign up using Facebook. If the audio source is your PC soundcard, and you’re powering the from an Lm315 board which is in turn v by the same PC’s USB power, you can’t guarantee the audio ‘ground’ is the same mfter the ‘ground’. Feel free to ask any question in the comments section below.

Electronics Part We will start with the electronics part. Yes, you can use 9V DC power supply. So I secured the infinity mirror to the box using a glue gun, cut its cover to size, made the holes and attached the power jack, the audio jack, the potentiometer and the switch. If that still doesn’t help, you’ll just have to ‘manually’ reduce the input voltage between the cap and pin 5 with a simple voltage divider.

This is the schematic from SFE and they way i hooked everything up.

Infinity Mirror Music VU Meter Electronics Project using LM IC – HowToMechatronics

Leave a Reply Cancel Reply Your email address will not be published. Click here for instructions on how to enable JavaScript in your browser. Even if you’ve connected the 3.

Next we need something on which we will attached the LEDs that will hold them between the mirror and the glass. Sign up or log v Sign up using Google.