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DC to DC converter

Hi ppl, for electronics A level coursework i am hoping to build a DC to Dc converter to use to power high power leds. As far as i understand it will convert DC to AC, use PWM to alter the current out, and then convert this back to DC giving a constant current out. These are available in devices (known as buckpucks) but for my coursework i hope to build a similar thing on Breadboard. This is really a question for the engineers and if they could give me some advice on anything to do with this it would be great! Thanks ppl

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if ur using it for high power leds then i would suggest to use a max756 switch mode converter. or if you what you could use a 555 timer as pwm and a pot to controle to frequecy and duty cycels of the pwm and use that as a base to drive a transistor/mosfet. have the right vlaue inductor. if you need a really smooth output then add an LCR to the circut to smooth out output ripple hope this helps :)
guyfrom7up9 years ago
just use an IC, some only require like 2 capacitors and a resistors. You could use a vol;tage multiplier
This is really a question for the engineers - You didn't ask any question;-)

Cheers,

Pat. Pending
drummer ian (author)  Patrick Pending9 years ago
haha sorry pat, im just really looks for suggestions on how i would do it not using ICs! seems little info out there on the www about it to make one that has constant current but without using ICs
drummer ian (author) 9 years ago
bump:P
Did My links help any ?
Goodhart9 years ago
Well, here are the basics concerning simple DC to DC conversion... I hope it helps.