I tried to make a simple boost converter circuit for driving an LED using 555 timer IC, but somehow the output voltage is not increased at all. I suppose that the problem is the inductor I used, since I was unable to find a suitable one (i.e. around 220uH) and I end up using a 33uH.
Can somebody help me to build a 220uH inductor, or help me find a solution regarding the boost converter not boosting?
I am supposed to give around 3V input and get at least 12V output.
The components I used are:
555 IC
IRFZ44N MOSFET
100uF 25V capacitor
1N4007 diode
10k variable resistor
33uH inductor
Schematic source: Et Discover
The circuit diagram used is this. Also note that I used a 20nF capacitor with the 555 IC which, according to diagram, should be 100nF. Is this the problem or the inductor as mentioned?
I suppose that the problem is the inductor i used since i was unable to find a suitable one(i.e. around 220uH) and I end up using a 33uH.
This wouldn't cause your boost converter to "not work" but perhaps not work the way you want it to. Yes, as Warren mentioned, please provide a schematic. Also, it would be helpful to also list some other specifications as well, not just your desired output voltage, i.e. ripple, switching frequency, etc. You've chosen a particular FET and some other components, which indicate that you are looking for more than just a 12v output. \$\endgroup\$