12v Step-down?

[CCinPA]

In looking around a bit... I believe "step-down" is the correct term.

12v automotive application. I need an adjustable "???" to step-down between 12v and 9(ish)v. Help?

 

[Tha fios agaibh]

You didn't spicify amperage but;
Look at a lm7809 for 9v, or a lm317 for variable.

 

[duke37]

The 7809 or LM317 wil do about an amp and may need a heat sink.

You can get switch mode buck convertors which are more efficient (less heat) and can provide higher currents. They may be a bit dirty and produce noise on radios.

 

[CCinPA]

Update: Need a solution with lead-wires. Heat-sink? Noise would be a problem for the automotive project.

 

[davenn]

Update: Need a solution with lead-wires

what specifically do you mean by that ?

 

[davenn]

12v automotive application. I need an adjustable "???" to step-down between 12v and 9(ish)v. Help?

search eBay for DC-DC BUCK Converters .... there's a zillion of them for a few $$ each

 

[CCinPA]

search eBay for DC-DC BUCK Converters .... there's a zillion of them for a few $$ each

"There's the wrong-way... And my-way" (SC)

I checked eBay... Looks very promising... Thanks!