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. :)
Part List:
- IC LM386
- 2N3904 (transistor)
- 10K potentiometer
- 100K potentiometer (i used 250K and it’s okay, 100K is more recommended tho)
- 10K resistor 1/4 or 1/2 Watt
- 0.1uF (104) capacitor
- 10uF capacitor
- 220uF capacitor
- on/off switch
- 9V battery
- 3.5 mm mono jack audio
Schematic:
PCB board layout:
PCB print (inverted)
Some Pics:
good job sir…. :)