Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Can a 12V adapter be made variable?

Status
Not open for further replies.
O

Onedesign1

Newbie level 1
Joined
Apr 6, 2010
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Melbourne FL
Activity points
1,287
Dumb question...sorry... but I'm wondering if a 12V DC wall adapter can me made variable with a 5k or 10k pot at the 12V end? So still plug it into the 110V wall outlet and add a pot at the 12V end to make it variable. Will this work? Ideally I'd also like to limit the voltage to 10V. Thanks in advance.
 

Most unlikely, you can't change a fixed power adaptor, but you can add a simple voltage regulator (google for LM317) and have the output voltage adjustable from, say, 1.5V to almost 9V (assuming the input is 12Vdc) .. see attached picture ..

Rgds,
IanP
:D
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top