View Full Version : Li-po Reciever Pack


ICEMAN96
06-13-2006, 05:39 PM
Can You Use A Lipo With A Voltage Reducer For A Reciever Pack.it's Alot Less Weight.

ta_man
06-13-2006, 06:02 PM
Someone where I race has done exactly that using the Novak Servor Regulator (or whatever Novak calls the thing). He used a 2C LiPo pack.

tamiya_kid_ta04
06-14-2006, 12:30 PM
thats accualy a really good idea!!

DynoMoHum
06-14-2006, 02:48 PM
There are also voltage reducers available... Most likely there is a voltage increaser available too, where you could use a single LiION/LiPo cell too, I haven't looked that closely for the step up option, but it more then likely exists.

MIKE VALENTINE
06-14-2006, 03:48 PM
DynoMoHum long time, most of the dc to dc voltage increasers need an external power source. Which makes them almost useless for r/c cars. Unless you have beeter luck then I did searching for them. If you find any please let me know.

DynoMoHum
06-15-2006, 04:35 PM
There are most defintely things that will do it, without external power other then the LiPo... I know because I've been busy with anohter hobby where this kind of thing has come up... (portable data storage devices)...

In these PSDs they sometimes operate a 5 volt hard drive based on a single 3.7 volt internal LiPo cell. So, I know for sure the devices are there... I've been playing with ones that go the other way, for other reasons... but I'll search and find something that will go from 3.7 to 5... Texas Insturments has a bunch of stuff, often you can get stuff that requires only a extra capacitor and a resistor to make it work, etc... You can even get free samples if you ask nicely... :) Typicaly these devices can be purchased at electronics resellers for in the neighbor hood of $5 to $10...

I may not get to it this week, but I'll find something in the next few days, or early next week and report back.

DynoMoHum
06-16-2006, 01:33 PM
Here is a Texas Insturments Power module that will do the job...

http://focus.ti.com/docs/prod/folders/print/ptn04050c.html

A single resistor will set the voltage output... set anywhere from 5 to 12 volts where the output is at least .5 volts higher then the input Puts out up to 2.5 amps... It requires a couple 100 micro farad capacitors as well.. It cost about $10 to $15 wholesale... You can buy it for $15.50 if you only want one... $12 if you buy a 100, etc...

https://www.em.avnet.com/pns/home/0,1662,CID%253D0%2526CCD%253DUSA%2526SID%253D0%252 6DID%253DDF2%2526LID%253D0%2526BID%253DDF2%2526CTP %253DPNS,00.html?ref=https://emwcs.avnet.com/webapp/wcs/stores/servlet/RemoteAdvancedSearchView?langId=-1&storeId=500201&catalogId=500201&manufacturerPartNumOperator=EQUAL&manufacturerPartNum=ptn04050cah&manufacturerOperator=EQUAL&manufacturer=TIS

I have not yet examined ALL the fine print in the design sheet, but it should be fully capable of making 5 volts output for a receiver and/or servos from a single LiPo cell...

LARCGuy
06-16-2006, 04:21 PM
Anyone have a lead on small/lightweight 2 C Lipo pack to use?