can anyone help please?

[dudewheresmybass]

hi... er
basically what the title says!

i know i'll need 4 jack sockets, and a DPDT switch as well as a box, but that's about it!

Any help much appreciated!!

cheers

[BOD2]

If you mount it in a metal box, then you can connect all of the earths from all 4 jack sockets to the metal casing and then ignore the earth contacts on the jacks - they will all be connected together. If you use metal jack sockets then the action of screwing them to the metal box will do this.

I think this diagram should do the job.

[attachment=6451:Looper.jpg]

Looper switch earthed using metal box.

[dudewheresmybass]

that's great mate,

cheers

[dudewheresmybass]

i just got hold of some tpdt switches, however i can't work out which way up to wire it.

is there any way i can tell which way up it (the switch) goes?

Edited April 1, 2008 by dudewheresmybass

[BOD2]

[quote name='dudewheresmybass' post='167617' date='Apr 1 2008, 01:41 PM']i just got hold of some tpdt switches, however i can't work out which way up to wire it.

is there any way i can tell which way up it (the switch) goes?[/quote]


Is that TPDT (as in Three Pole Double Throw with 9 contacts on the switch) ?

Are there any markings on the poles of the switch (other than just numbers) ?

Do you have a multimeter at all ?

[Dread Bass]

Hey im working on making one of these too im using the design from here:

[url="http://www.beavisaudio.com/techpages/PedalHacker/index.htm"]http://www.beavisaudio.com/techpages/PedalHacker/index.htm[/url]

I have no experience of electrics or anything but im having fun

[dudewheresmybass]

"Is that TPDT (as in Three Pole Double Throw with 9 contacts on the switch) ?"

that's it!

"Are there any markings on the poles of the switch (other than just numbers) ?"

No numbers, no markings apart from a small indent on one side of the casing.

"Do you have a multimeter at all ?"

Yes I do!

[BOD2]

You can check what the switch does with a multimeter.

With a 3PDT (or TPDT) switch you can think of the 9 contacts as 3 rows of 3 contacts like below

1 2 3
4 5 6
7 8 9

In one state, the poles are connected as follows -

4 to 1
5 to 2
6 to 3

When you operate the switch the poles are connected as follows -

4 to 7
5 to 8
6 to 9

So what the switch does is changes the connections to the middle row (4, 5, 6).

The only problem you have is that with 9 contacts the switch is symmetrical when viewed so you can't tell if you looking at it as shown above, or the other way round as shown below

7 4 1
8 5 2
9 6 3

So what to do is take the switch and with your multimeter check between the leftmost middle contact ("4" in the diagram at the top of this post) and the contacts above and below ("1" and "7" in the top diagram).

If the multimeter shows a connection then you're looking at the switch as shown at the top of this post. If you don't get any connection, turn the switch through 90 degrees and try again. You should get the connection this time.

Now draw a diagram of the switch, showing where the indent on the casing is, and put the numbers on your diagram.

Sorry this seems long-winded - it's quite simple really !

[dudewheresmybass]

that's great -
the indent is at the top with 1,4 and 7 down the left sie

cheers!

[Steve_K]

Wow - who knew a Talent Boost pedal was so easy to make!