[module/tutorial] Audio Amplifier

386amp layout

Board Layout

 

Often, we need an audio amplifier for low signal devices such as microphone or piezo transducer. This is a simple low power audio amplifier based on LM386, a relatively cheap IC that’s available in most electronic store. Schematic, Part List and PCB design available below.

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Simple White Noise Oscillator [tutorial]

I always wanted to make a white noise oscillator that is simple and powerful using easily found components in Indonesia. I received a schematic from a friend of mine Lintang Kenalirangkaipakai (he didn’t create it, he found it from the internet) and give it a try to see how it sounds. I have seen this schematic when I’m surfing the internet, however I never give it a try or maybe I was too lazy :P. The schematic is very simple, only using several part that in total cost you less than Rp.10.000,- and you can get it in any electronic store in your city. Since I like it, I thought I share it along with a PCB design, EagleCAD board and schematic files and layout so anyone can use it. Or you could just prepare your breadboard (like I did) if you’re not convinced with the sound on the video and want to check it out on yourself. :)

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