FU$&*ING idiot Volt light.....

[daveismissing]

This guy will make you anything you want:

http://www.mcnallyelectronics.com/digital_boost_gauges.htm

[$1987 GN$]

If you can solder here you go. Just use some good parts and multi turn pot.
Pretty basic want.
About 5 bux of parts the box or led will cost the most.


AJ___

[SuperSix]

What will that circuit do?

[earlbrown]

It looks like an adjustable idiot light based off of voltage.

[$1987 GN$]

Was away.
Correct Earl.
Oh adjust the variable till the led turns on when the battery voltage drops to your required level.

AJ___

[earlbrown]

I've never seen a zener diode used like that in the voltage divider.

 What's the benefit of doing that instead of a normal resistor on both sides? Current consumption?

[$1987 GN$]

Basically turns the op to a comparator.

AJ___

[earlbrown]

I built a differential thermostat two winters ago to control my homemade solar heating system.


After I got it built (and buggy as hell) I learned that you should use op-amps for comparator circuits instead of comparator chips. GRRRRRRRR


Teaching myself electronics is more harder than learning how to keep a keep a factory ECM in tune!

[Steve Wood]

If you would try tuning in F sharp instead of D flat, that ecm would come around in no time

[earlbrown]

I haven't taught myself about cheeses yet. I can't tell a sharp from a flat from a chedder

[daveismissing]

Well, the comparator is faster and cleaner, it just has open collector aka single ended outputs. If you buffer the signal it works ok.
   

[daveismissing]

http://tinyurl.com/cheezeswow