come someone give me a link to a 5v 2-3 amp linear voltage regulator. i need one on a breakout board. all i can find is dc -dc converters. i know how to assemble the regulator but im trying to find this on a breakout board. thanks
2-3Amp linear regulators are last century.
Why can't you use a buck converter (that doesn't get hot), like everybody else does.
Leo..
LM350K and a really BIG heatsink. Oh, breakout board. Never mind.
Wawa:
2-3Amp linear regulators are last century.Why can't you use a buck converter (that doesn't get hot), like everybody else does.
Leo..
im using a buck converter right now but i think i have some noise coming from the buck converter and it causes my sensor to vary making it not so precise. im not sure if a resistor-capacitor filter will condition the voltage and keep out the high freq noise from the buck converter.
Just saw your other thread.
Maybe you should have asked this there, so you don't have to inform the readers again.
You might be jumping to conclusions here.
Trying to fix things without knowing the exact reason causes frustration and wastes time and money.
Maybe you should power whatever you think is causing it with a lab supply first, before building an expensive dinosaur.
If... the switching supply is causing it, you might want to add an LC filter to your switching supply.
Had a quick look at your other thread(s), but I didn't see any wiring diagram.
That might be the most important part in getting help.
In all those posts I see solutions handed out, but nowhere I see the problem being analysed.
Leo..
You can also increase the current capability of a linear regulator by adding one or more power transistors:
http://www.reuk.co.uk/wordpress/electric-circuit/high-current-voltage-regulation/
http://www.rason.org/Projects/vreg/vreg.pdf
ReverseEMF:
You can also increase the current capability of a linear regulator by adding one or more power transistors:
Note that this also needs a higher transformer voltage, to compensate for the extra dropout voltage.
And a larger heatsink.
Leo..
Without knowing where the noise may/may not be coming from, or even what is being affected and by what degree, this is pointless.
What sensors? What other mains equipment is in the tank with the sensors? What kind of tank, metal or plastic? What is the deviation of the sensor you believe is in error? How far is the uC from the sensors?
I dare to say that using software to draw the wiring is not the only way to do it :-).
Myself I am hand-drawing them. I still have to post one drawing in my thread about wire management. I will do it asap.
The LM723 is the traditional device for rolling your own specialized regulator using an external pass transistor.
For instance: http://www.circuitstoday.com/30v-3a-adjustable-regulator-using-lm723
Actually I just came across the LM338 5A regulator. http://www.ti.com/lit/ds/symlink/lm338.pdf
Or you can use LT1085 3A 7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators from Analog Devices
http://www.analog.com/media/en/technical-documentation/data-sheets/108345fh.pdf
Hi,
I don't think anyone has asked, WHAT are the sensors?
How are they connected to the power supply and your Arduino?
What model Arduino?
What is the application of your project?
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
Can you post a picture of your project so we can see your component layout?
Thanks.. Tom.. 
notsolowki:
im using a buck converter right now but i think i have some noise coming from the buck converter and it causes my sensor to vary making it not so precise. im not sure if a resistor-capacitor filter will condition the voltage and keep out the high freq noise from the buck converter.
You don't need 2A for sensor, use separate voltage regulator for it