voltage drop

diode · Post by **diode** » Sat Aug 07, 2004 9:36 pm

I've got a 12 volt battery, a UPS battery, and several EL sequencers I'd like to drive off it.

The sequencers have a small port in the side that lets you supply voltage. 9V, 500 milliamps.

So the trick is, how do I drop the voltage off the battery to supply these units? I can solder, have a smattering of electrical theory. Just don't know the quick answer.

D

bellboy · Post by **bellboy** » Sat Aug 07, 2004 11:04 pm

i think there is a regulator maybe an LM 7909 check on google they're easy to use (no load or external ckts) i think they'll handle 800 mA but don't quote me. bellboy

sgrunspa · Post by **sgrunspa** » Sat Aug 07, 2004 11:26 pm

bellboy is right. you need a voltage regulator. if you go to www.digikey.com you can find everything, including data and spec sheets on all the parts which usually have a wiring diagram.

if you look for voltage regualtors, you can sort by voltage and current. they should cost about 50 cents to a dollar.

Bob A · Post by **Bob A** » Sun Aug 08, 2004 12:57 am

You may not need to drop the voltage. All the controllers I have for EL wire that have a nine volt plug or ask for 9 volts also work on 12. Infact some of them recomend using 8 AA batteries vs 1 9 volt. Check into this. They will be brighter with the 3 extra volts,

Bob A

diode · Post by **diode** » Sun Aug 08, 2004 8:09 am

Bob A wrote:You may not need to drop the voltage. All the controllers I have for EL wire that have a nine volt plug or ask for 9 volts also work on 12. Infact some of them recomend using 8 AA batteries vs 1 9 volt. Check into this. They will be brighter with the 3 extra volts,

Bob A

Cool. That's what I wanted to know.

D

MrChevere · Post by **MrChevere** » Sun Aug 08, 2004 10:50 am

I've read EL works at higher voltage but just doesn't last as long. 5 years instead of 10, but it is brighter.

voltage drop

voltage drop

a voltage regulator

look in digikey