A 13.8V DC power supply

[SeanHatch]

How would I make this? I would like to make it from 3 9V batteries, so how can I get it down to 13.8V, can I just use resistors or am I going to need a transformer or voltage regualtor.

Thanks

 

[Skyknight]

Why don't you use two of those batts in series and use a zener diode? :idea:

 

[Skyknight]

Here it is my idea

[Hey! I can't attach any drawing :evil: (And I wanted to)]

Can anyone tell me how I can't add an attachment here, but I can do it in other posts? What I'm doing wrong :?: :?

 

[SeanHatch]

If you can't figure out how you can just email me your idea at

htmlguider@yahoo.com

 

[Skyknight]

I've already done it. Didn't you receive it? :?

 

[SeanHatch]

Yep thanks

 

[Sebi]

Skyknight, You can attachment into projects/ideas forum... see below.

 

[bogdanfirst]

why do you need 3 batteries? i think that 2 are enough....this way you can reduce from 18 to 13.8 you can use a LM317 regulator....