Troubleshooting a Boost Converter Circuit

[NascentOxygen]

The diode that stops the capacitor discharging is missing. It goes between the transistor and capacitor.

 

[David lopez]

i did include a diode in the circuit. i forgot to draw the diode in the schematic. it is a 1n4004 diode. why is the circuit not working?

 

[Svein]

Yes, the TIP36c is a PNP transistor. You have drawn an NPN transistor, and you need an NPN transistor in your circuit (although most circuits use an N-channel MOSFETS these days).

 

[David lopez]

and i put it between the transistor and capcitor.

 

[David lopez]

why won't a pnp transistor work?

 

[Svein]

why won't a pnp transistor work?

Since the polarity of all electrodes are the opposite of an NPN transistor. See http://www.learningaboutelectronics.com/Articles/Difference-between-a-NPN-and-a-PNP-transistor .

 

[davenn]

and i put it between the transistor and capcitor.

The right way around ?

redraw you circuit