step down module

OK, It just arrived. a little smaller than the size of a 9 volt battery. has holes at each corner for a wire, in/out, + -. nothing to adjust it??
bumpy

Forgot I also use one of these to limit voltage to my dashboard gauges:


http://www.amazon.com/DROK-Waterproof-Converter-Adjustable-Transformer/dp/B00C0KL1OM/ref=pd_rhf_se_s_cp_4?ie=UTF8&dpID=41xGfo3wV7L&dpSrc=sims&preST=_SL500_SR135%2C135_&refRID=10ENJ494V9G94XARBD72

The original mechanical voltage limiter was susceptible to RFI, and 7x as expensive to replace.

Now the gauges do not swing with input voltage changes, but now I've got that issues resolved too.

Bumpyroad wrote:
I guess then it can sort of stabilize the voltage?
bumpy

Not 'sort of.' It does.

Bumpy
Watch the Amps and Watts rating, this was probably ordered for a specific purpose not whole house

I use something similar as a trickle state charger to maintain the engine batteries

And another one as a voltage regulator in the gauge console to keep a steady voltage on my gauges

It used to be when I turned on the running lights, the fuel gauge went down and the temp gauges went up, because supply voltage changed

I use one on a Fan that does not like battery charging voltages. It has the voltage display. I set it at 11.2 volts, When battery voltage drops to 12.3, then it cannot maintain that 11.2 volts.

Seems to be a 1.2 volt overhead

I bought two others without display , some 2 for 3 dollar special on Amazon, slow boat from China. Much smaller, leads need to be soldered. They remain unused

mchero wrote:
In the front of my rig, where the entertainment stuff goes I have both a router and External hard drive (for DISH). Both are 12VDC devices.
Connecting directly to 12VDC house battery voltage the voltage can vary from -12VDC up to & possibly past 15VDC!
If I add a DC to DC converter I can set the output voltage & it "should" stay at that set voltage if the 12VDC power fluctuates it "should" keep it at the set voltage, e.g. 12.5VDC. If I equalize the batteries (15+VDC) both the hard drive and router should ONLY see 12.5VDC.
Thus the need to a DC to DC converter.

Hope this helps others.

thanks, I guess then it can sort of stabilize the voltage?
bumpy

In the front of my rig, where the entertainment stuff goes I have both a router and External hard drive (for DISH). Both are 12VDC devices.
Connecting directly to 12VDC house battery voltage the voltage can vary from -12VDC up to & possibly past 15VDC!
If I add a DC to DC converter I can set the output voltage & it "should" stay at that set voltage if the 12VDC power fluctuates it "should" keep it at the set voltage, e.g. 12.5VDC. If I equalize the batteries (15+VDC) both the hard drive and router should ONLY see 12.5VDC.
Thus the need to a DC to DC converter.

Hope this helps others.

To prevent cheap leds from burning out?