Hello dear friends,
Any one can suggest a practically proven and simple 3v or 3.7v to 5 vold dc booster circuit.. please help me. thank you
The circuit is simple, what is complex is the implementation. The layout is crucial that is why so many home made systems fail.
You are better off buying one.
Like one of these, with or without displays.
Seems like you already have one, it certainly did boost the title to all caps...
But a simple boost circuit is just to buy one 
http://www.aliexpress.com/item/5pcs-lot-MT3608-2A-Max-DC-DC-Step-Up-Power-Module-Booster-Power-Module/32382378663.html
WHY ? (do you need one? What are you trying to do?)
septillion:
Seems like you already have one, it certainly did boost the title to all caps...
lmao.. (seriously... I laughed out loud!) lol
Too much work to make my own. I just buy mine from Polulu.
raschemmel:
WHY ? (do you need one? What are you trying to do?)
i am asking there is any circuit to do ourself...i did it once by using juke thief but the ckt is little bulky with inductor, i wish little more small ckt..i am doing a project with a gas sensor.. its working voltage is 5v and i have 3.7 Li polymer batter so need to boost the voltage before given to gas sensor and controller
ecworks:
i am asking there is any circuit to do ourself...i did it once by using juke thief but the ckt is little bulky with inductor, i wish little more small ckt..i am doing a project with a gas sensor.. its working voltage is 5v and i have 3.7 Li polymer batter so need to boost the voltage before given to gas sensor and controller
You'll find that it's cheaper (and easier) to buy one ready-made on eBay than it is to buy the parts and make your own.
ok friends..thanks for your reply, and thanks for your valuable time to help me