Metal sheet with breadboard

Hi All,

I've got this breadboard from circuit specialists

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and when I opened it, I found a sheet of metal inside of exactly the same size as the board. The package doesn't say anything about its purpose. Can anybody advise me of the purpose of that? Some sort of ground plane? EMI reduction?


Reply to
M. Hamed
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Sure put it under your proto board and try connecting it to various grounds. It might help a bit. When you start to see a lot of pick-up noise try putting your whole circuit inside a metal box.

George Herold

Reply to

"M. Hamed"

** AC supply frequency *electric* fields ( not magnetic) are almost everywhere inside a premises - ie the world is full of hummmmmmmmm. AC electric fields induce AC voltages on the conducting parts of a circuit by capacitive coupling.

However, such electric fields are easily defeated by surrounding any circuit sensitive to the frequencies involved ( 50/60 Hz plus harmonics) with a conducting surface ( ie a metal box) * tied * to the common or "ground" of that circuit.

Short of a complete metal enclosure - a sheet of metal placed under the circuit you are working on does a pretty fair job too. So the makers of that breadboard have kindly supplied you one to use.

When you connect your circuits up to a scope you will soon see what the idea is all about.

.... Phil

Reply to
Phil Allison

I used to have a solid steel sheet ground plane under the test bench. It can make a difference or two.


Reply to

It's to mount it on. Clean it well, and peel&stick the breadboard to it. Then go to the local DIY store and pick up some adhesive rubber feet. You should be able to take it from there. ;-)

If it has countersunk holes, that's for flathead screws, to attach it to threaded feet, a power supply box, a whole test/development station, or whatever.

For standalone, it also acts as a bit of ballast so your board doesn't slide all over the table. ;-)

Cheers! Rich

Reply to
Rich Grise

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