October 3, 2020

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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That would be great Reply. Feel free to ask any question in the comments section below.

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

So if there is anyone that might know whats up with this, it would be much appreciated. You’ve saturated the input SIG, pin 5 above the reference voltage Rhi, pin 6. So the lm9315 and the housing that I used for this project are from a wall clock and I managed to find a suitable same size mirror.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of vuuprivacy policy and cookie policyand that your continued use of the website is subject to these policies. This website uses cookies to improve user experience. Sign up using Facebook. 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.

As i said, connecting audio jack changes nothing, but for instance if gu grab GND and Signal with mi fingers, all of the LED’s light up for l3915 short period of time.


By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. We will start with the electronics part. Now because 10 LEDs are just too less for a project like this, I made a little modification to circuit schematics.

Home Questions Tags Users Unanswered. Therefore from the other side of the filmed glass you will be able to see the infinity effect.

Infinity Mirror Music VU Meter Electronics Project using LM3915 IC

Hello, Can I use 9Vdc power supply without doing any modification? It may be a little too much, but you get a much better visual effect. My guess it scenario b. Just make sure it has the appropriate current rate. CharlieHanson 1, 4 Here mrter the picture of the problem: With a huge spektrum? All manner of rectifiers can be found in the ‘s datasheet, and the goes that bit further with genuine-specification VU-meter circuits.

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Once they are secured in place on top of them goes the mirror which is also secured using a glue gun. Sign up or log in Sign up using Google.

Click here for instructions on how to enable JavaScript in your browser. At this point it can get a bit messy because of the many wires so you should be careful when connecting them. Nothing changes, always the same results. Post as a guest Name.


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. The ten output fu are active low with a current from 1mA to 30mA so the LEDs should be connected with the negative lead to the IC outputs and there is no need of resistors.

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

That would be great. If you look at the SF schematic, they’ve connected a direct adjustable DC source to pin 5, vy you’re connecting an audio source that could be: Sign up using Email and Password. Yes, you can use 9V DC power supply.

Once we are done with that we also need to solder all wires coming from the LEDs to the circuit board. Leave a Cu Cancel Reply Your email address will not be published.

Electronics Part We will start with the electronics part. So, in the housing first goes the filmed glass and on top of it the Styrofoam with the LEDs. Email Required, but never shown. Next we need to assemble everything together.

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