Hey here's another OT question from me. I'm working on a gas saving device that uses a float switch and solenoid valve, but both work at 24v and the car runs at 12v. I've done some searching, but haven't found anything specific to those voltages. I was hoping that you guys could point me in the right direction. If you guys can point me to a forum that deals with general electronics, please do. I'll, then, save this forum for my FX posts.
Thanks,
Matt
wouldnt the charge pump over at geofex be able to double 12v to 24v?
sure someone will provide the link.
there is a link under power supplies or something at GGG
I probably wouldn't try it with a MAX1044. The data sheet recommends a maximum input voltage of 10V and a pretty small input current.
I don't think there are any charge pumps that would be able to handle the kind of current that you'd need.
Phillip
I know the ICL7660S charge pump can handle a 12V input and gives just under 23V output, but I doubt it would be able to handle the kind of current you'd need. I might be wrong though, the datasheet is online at the Intersil website IIRC. I started using them because they're easier to source in the UK than MAX1044s and have the same pinout and boost option.
Forget about using a 1044 or 7660. Google around for voltage doublers (buck & boost), if you need lots of current you can use an inductor based one. I don't have the links handy but there's tons of them out there. Since you're not dealing with audio frequencies, your options open up immensely.
Here's a link to get you started:
http://www.hills2.u-net.com/electron/smps.htm
Quote from: cdForget about using a 1044 or 7660. Google around for voltage doublers (buck & boost), if you need lots of current you can use an inductor based one. I don't have the links handy but there's tons of them out there. Since you're not dealing with audio frequencies, your options open up immensely.
cd, could I safely get 18v from a 9v supply with the MAX1044 as per the
article ?
I need 18v for an Ibanez Flanger which EATS 2x batteries !! :shock:
Also for a Mutron III+ so it will be in its own small enclosure.....
Thanks,
Marty.
( sorry for the hi-jack ! )
Quote from: MartyMartQuote from: cdForget about using a 1044 or 7660. Google around for voltage doublers (buck & boost), if you need lots of current you can use an inductor based one. I don't have the links handy but there's tons of them out there. Since you're not dealing with audio frequencies, your options open up immensely.
cd, could I safely get 18v from a 9v supply with the MAX1044 as per the
article ?
I need 18v for an Ibanez Flanger which EATS 2x batteries !! :shock:
Also for a Mutron III+ so it will be in its own small enclosure.....
Thanks,
Marty.
( sorry for the hi-jack ! )
Depends what your current needs are. IIRC a 1044 can output 20mA. If you need more than that, you'll have to parallel two 1044s, or try a different circuit.
I tried looking around but I couldn't find anything appropriate.
Thanks for the info guys. I got the stuff in today and hooked up a universal dc converter. They actually only need about 9v so I think I should be fine. I was surprised, though, that there isn't much out there that will double the 12v.
Thanks again,
Matt
try this DC-DC converter (http://www1.jaycar.com.au/productView.asp?ID=KC5358&CATID=&keywords=dc+dc+converter&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=) kit (which is basically a fancy-shmancy switch mode power supply)
There should be other similar products out there.
You find them in the funniest places... I found a 5-9V DC-DC converter on an old Intel LAN card at the local junk recyclers!
Quote from: MartyMartQuote from: cdForget about using a 1044 or 7660. Google around for voltage doublers (buck & boost), if you need lots of current you can use an inductor based one. I don't have the links handy but there's tons of them out there. Since you're not dealing with audio frequencies, your options open up immensely.
cd, could I safely get 18v from a 9v supply with the MAX1044 as per the
article ?
I need 18v for an Ibanez Flanger which EATS 2x batteries !! :shock:
Also for a Mutron III+ so it will be in its own small enclosure.....
Thanks,
Marty.
( sorry for the hi-jack ! )
You can indeed. The whole reason I first checked out the ICL7660S (Maplin sell them pretty cheap) was to put a charge pump into an old Ibanez FL-301. Works fine too. There's a vero layout in my gallery for a voltage doubler.