Thread: is this safe for the 701L?

to be on the safe side i'd always run it from the PSU.. or use a regulator.

i might as well get a regulator for a couple of bucks to protect my 240 dollar screen.

If you find a "regulator for a couple of bucks", please let us know where to buy one.

Originally posted by tejesh83
If you find a "regulator for a couple of bucks", please let us know where to buy one.

dude, regular old linear regulators are usually under a buck for 1.5A 12v

I thought linear regulators only work as step down voltage regulators. To have regulated 12V, I would need about 15V or higher. If the input voltage dropped below 15V, the output voltage would be unregulated. In my car, I see 11-12V with the engine off and 13.5V with the alternator, so the regulator would have no effect. Finding a regulator that operates with 13.5V may do the trick.

Also, what about the other extreme, where the input voltage will spike past the input voltage range. Do these cheap linear regulators have load-dump protection from overvoltage transients?

I was under the impression, that a linear regular would fail under both conditions and was thus a poor choice for automotive application. But if you know where I can find with 12V input and load-dump protection regulator for under a buck, I would really appreciated a link to the datasheet and somewhere to buy it from. I've tried digi-key, but I havent found anything yet.

Thanks.

you didn't look hard enough on digikey...

but anyway linear regulators are step down, but most screens will operate with a little less than 12v, so a 1.5v drop to 10.5v(car off) would likely be fine, and 12v(car on)

Originally posted by GingerPrince
That's why you build your regulator circuit to include a fuse, transient voltage supressor and reverse current protection diode.

price now $5 or less