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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

audio

  1. blueboy

    Phase Shift problem in audio equilizer

    Hello everyone, I am new to filter design and I want to design an audio equalizer. I used Sallen key topology design calculator from: https://www.changpuak.ch/electronics/Sallen_Key_Bandpass_light.php I designed five band bandpass filter having simple low pass and high pass for initial and...
  2. J

    Remove HDMI Audio?

    I wish to remove the audio properties of my HDMI display cables. Is there a way to do this by making an adapter that cuts out certain pins? The problem: I'm having problems with Audio being diverted to my monitors instead of the desired audio device. (Windows 10 has a tendency to re-route...
  3. sr13579

    How to use a TDA7052 IC properly?

    After a massive crash on LM386 I moved on to TDA7052. This is a very good IC so far. I want to make sound boxes and sell them. That is why I want to know more info than datasheet if available. I have some questions though: 1. How to secure the connection to reduce noise? 2. How to protect the IC...
  4. sr13579

    Is it safe to use a 5V-1A USB(Samsung mobile) charger for lm386?

    Hello everyone, A brother from my hometown told me to make a mini amplifier that can pull the power out from a USB charger(or PC USB). I happened to working on a logic gate IC and burned the IC while using a USB(power bank) charger. I want to know is it safe to use a 5V-1A charger to power the...
  5. E

    Is true-RMS meter required for audio signals?

    I know what true-rms is, but I wonder if it is required to measure a real audio signal. With "real" I mean a mix of many frequencies, not just a test pure sine wave. I suppose an average meter should work fine, but I've got no true-rms to compare. Would an average and true-rms meters differ...
  6. A

    volume/output power control using a knob in TAS5424C-Q1

    Hi Folks, It seems that the gain in the IC TAS5424C-Q1 can be controlled using I2C protocol. But I'd like to keep it simple using a hardware (rotatory knob). Is it possible to control the volume and output power using hardware control such as a rotatory knob generally used in car head units...
  7. E

    Class D amplifier for arduino

    I was playing about with transistor amplifiers nd I built this class D amplifier intended for use with the arduino ( or any other microcontroller) https://siliconjunction.wordpress.com/2017/02/28/class-d-amplifier-for-the-arduino/ Thanks Matt!
  8. J

    Z-2300 Generic Logitech Control Pod Help

    Please consider reviewing my Interpretation of this generic control pod diagram, to help me out in understanding the workings of this circuits. https://blog.jseaber.com/wp-content/uploads/2010/04/remoteV100.pdf I'm new to these electronic circuits, and this might be my first time trying to...
  9. vivid

    LED Audio Spectrum Analyzer Circuit

    Here is a Music Spectrum using NeoPixel RGB LED Matrix and ARM microcontroller. I used the online circuit design tool EasyEDA.com to draw the circuit. This link is my competed circuit diagram and PCB, where you can see it very clearly.
  10. CBB9

    Audio Triggered Switch Help

    I'm hoping someone here can help lead me in the right direction on an experiment of mine. In my car I have an automatic starter that includes a wire that when given the 12v negative connection will trigger the automatic starter. What I would like to do have this negative connection activated...
  11. A

    An audio amplifier for beginners

    Hey guys I just uploaded my tutorial on how to build a simple audio amplifier using an LM386 chip. When using the maximum supply voltage it can reach a power output of roughly 1 watt. Hope you find it useful. Schematic <Mod edit: If you have something to share, please post it here. Do not...
  12. P

    Amplifying AC voltage via DC supply voltage

    Hi all, at the moment I'm trying to amplify an AUX-Signal with a 12V DC supply voltage. I tried die setup from here as u can see in the picture below. But all I get is just an annoying noise sounding horrible. For the amplifier I used both the CA3240EZ and the OPA134PA. Maybe my grounds are...
  13. C

    Audio Controlled LED Chaser using Bandpass Filters and RGB LEDs

    Well, I have decided to take on a rather ambitious project to start out my 2016, but I am at a loss on where to start. I know what I want the project to do, and have a decent understanding of what needs to be done, but could use a little guidance in what circuit layouts would work best. I want...
  14. A

    48 Volt Phantom Power Supply with Photo-Schematic. Transformer Question.

    Hey guys, This is my first post and I am happy to have found this website. I am currently working on a project using a PCB and jumper wires to make a 48v Phantom Power supply to be used with multiple condenser microphones. To make a long story short, I found a "mostly" detailed post on another...
  15. willypa

    Technics SU-VX700 main bord repair(help needed!)

    So, I got my hands on this old Technics amplifier but the left channel is all loud crackle even at min volume while the right channel is clean and functional on all speaker settings (A, B, A+B). I inspected the boards and found 4 components completely burnt out. so much so that it was impossible...

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