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Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
Ya, not sure. All I know from a single spike test is that every time it spiked over my multimeters 500V limit.
Apparently they are called Yellow Medium Inverters. And can run 4, 6, and 8 watt flourecent lights. Found a Tutorial on them, same size and stuff, running a larger 24 inch one blacklight.
Well, the boost converter's voltage gain is limited. By it's own components not being mathematical ideal. They work with self induction. A current pulse creates a magnetic field in/around the coil which, when the current drops collapses, inducing voltage in the coil. *theoretically*, without load this voltage should be infinite. But as there cannot be an energy jump, the resistance of the coil and any other component involved will slow the collapsing speed of the magnetic field and thus be limiting current and voltage you get.
Registered Member #1696
Joined: Sat Sept 13 2008, 06:01PM
Location:
Posts: 21
I've build the converter, and it works great:) it charges my capacitors 21,4 times faster than the converter inside a disposible camera:) but, the variable resistor (I know the word for that in English, sorry) doesn't effect the voltage. it just keeps charging :S and the led doesn't burn when the capacitors are charged to a certain voltage. what am I doing wrong?
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
voyagerscout wrote ...
I've build the converter, and it works great:) it charges my capacitors 21,4 times faster than the converter inside a disposible camera:) but, the variable resistor (I know the word for that in English, sorry) doesn't effect the voltage. it just keeps charging :S and the led doesn't burn when the capacitors are charged to a certain voltage. what am I doing wrong?
Your lucky. I never see my led go on, it hits 30 volts and goes very slow. Testing it on a 9V battery, and I don't know whats wrong :( 8V over the + - of the 555, like 4V in the 10nf capacitors, 2 over the 1nf. Why :( Cant pass 30V, doubled checked the paths, not resistors yet, and the pot i checked. :(
Registered Member #1696
Joined: Sat Sept 13 2008, 06:01PM
Location:
Posts: 21
I tried a 9 v battery to, it charged to 45 volt, and stopped:P but, I thought, maby 9 V isn't enough to make the 555 chip work, or something like that I hooked the boost converter up to a 12V adapter, and it worked:) my advice is, try an adapter ;)
Registered Member #91
Joined: Thu Feb 09 2006, 03:03PM
Location: The Netherlands
Posts: 45
9 V is probably enough to get the circuit working, but the current you can draw from a 9 V battery before the voltage drops significantly is very limited.
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Kipmans wrote ...
9 V is probably enough to get the circuit working, but the current you can draw from a 9 V battery before the voltage drops significantly is very limited.
Dead-on. There's a reason I set the voltage to 12V despite the circuit being battery operated, after all it draws around 3A. 9V alkaline batteries can only supply around 0.5Ahours, which means 3A for 10mins. And that's not even taking the internal resistance of the battery into account.
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Boost Converter 4.5VDC-330VDC
