7 Simple Audio Amplifier using 317IC

Another simple audio amplifier circuit, but this time it uses LM317 regulator IC. The amp can deliver 1W power max and needs only few parts.  This circuit is originally from  vegmatic1966 youtube channel.
schematic diagram of LM317 audio amp

Part List:
C1, C3 - 10uF electrolytic capacitor rated 16V
C2 - 470uF electrolytic capacitor rated 16V
R1 - 470 ohms 1/2W
R2 - 10 ohms 2W
POT1 - 5 kilo-ohms potentiometer
SPK - 8 ohms rated 1W speaker
LM317 - 317 or any similar regulator IC

What to do:
After you assembled the circuit above, adjust potentiometer POT1 until the voltage across R2 is half the supply voltage (around 4.5V). Don't forget adding heatsink in your LM317. Check the polarities and pins of the parts before testing.

Part pinouts:
LM317 pinout


7 comments:

  1. Hello,

    i am representing www.mrosupply.com - industrial goods ecommerce store, extension of a family owned 114 year old business selling motors, electrical components, conveyor belting and related products. In this, we are looking for opportunities to buy inexpensive links from various blogs, websites, etc.. We would like to get a small tiny link on your website, on the homepage preferably. How much would that cost?

    Thank you in advance.
    Regards,
    Yanina Dani
    email: kievforyou@gmail.com

    ReplyDelete
  2. This circuit only serves as a sample, because the audio is horrible. Lm317 is a really good ... regulator..... only regulator ... kkk

    ReplyDelete
  3. what i need to change to put more powerful speakers(with more watts-W)

    ReplyDelete

  4. Thank you cooperative!
    Definitely one favorite post.
    Soon you can quickly download all the crack software
    Please visit!
    I think you will see this software. Visit our website: -
    ===============================================
    Softcracks.Info
    =================================================
    USB Disk Security
    Audio Amplifier Pro
    Start Menu X
    Salview
    DiskDigger

    ReplyDelete