EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: cobbler on November 16, 2015, 12:39:16 am
-
Hello, thanks for the great videos and blog. Have learned so much. I searched the forum and could not find an answer regarding working on multiple completely projects simultaneously.
I have built a few ardruino projects and they are going well. I have three projects going in parallel each with their own breadboard and ardruino, Is it possible that a HP power supply with 5v can be used on all three projects simultaneously. I am really interested in this for prototyping. I don't want to keep unplugging the power supply everytime I switch to working on a new project.
And I am also considering this for future products where I will need more than 5v or 3.3v.
Is that why Dave has 500 PSU's in the background of his videos :)
Also any other tips for working on multiple projects simultaneously?
Thanks in advance for any advice on working multiple things without constant unplugging and replugging as I switch gears.
-
By "HP power supply" do you mean an old HP bench power supply? Or a PC power supply that's been modified?
Both will work for what you want. The PC power supply is almost better since you can't forget you left project A plugged in then twist the knobs for project B, potentially blowing something up; the 5V rail will always be around 5V.
-
ok thanks.... I was talking about a hp bench ps. so even if multiple devices are pulling on the same 5v rail it will not impact the voltage integrity?
-
Providing it does not exceed the current rating or the current limiting you set on the supply then of course it will work perfectly :-+
Now the current limit you set - that is very useful when powering up individual projects for testing or faulty boards - that's when you want the isolation of a dedicated supply and not share it.
-
Providing it does not exceed the current rating or the current limiting you set on the supply then of course it will work perfectly :-+
Now the current limit you set - that is very useful when powering up individual projects for testing or faulty boards - that's when you want the isolation of a dedicated supply and not share it.
Ok thanks ::)
-
So you want to leave powered up projects you are *NOT* working on at the moment scattered across your bench? Bad Move - one stray wire clipping or dropped component or tool later and you havea fair chance of blowing one or more of them up.
OTOH if you have a soak test bench or shelf, then powering multiple projects on long term test from the same 5V PSU makes sense, but add an inline fuseholder for each with an appropriately rated fuse.
Anyway, what's the big deal with having to plug in two banana plugs when switching projects?
+1 for having one supply per project for actual bench testing.