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Speedy11(at)aol.com
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 Posted: Wed May 10, 2006 9:20 am Post subject: How to wire switch |
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I need to attach multiple wires to a rotary switch so as to make an engine
monitor display indications from three inputs. As I look at the switch, I'm not
sure how to connect the wires to the tiny connections on the back of the
switch. I know which places to make connections, just not how to mechanically
connect.
I'm wondering if there are fast-ons that are that small or if I'm supposed to
simply solder the wires to the little connections?
A photo of the switch is at http://www.rv-8a.net/electrical.htm.
Help anyone?
Stan Sutterfield
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recapen(at)earthlink.net
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| Posted: Wed May 10, 2006 9:42 am Post subject: How to wire switch |
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The connectors have holes in them...I pass the wire through the hole, twist it back around itself and solder....
The twisting back is optional - holds it in place while I solder........
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recapen(at)earthlink.net
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| Posted: Wed May 10, 2006 10:02 am Post subject: How to wire switch |
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I would also throw a chunk of clear heatshrink tubing on it after.......
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frank.hinde(at)hp.com
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| Posted: Wed May 10, 2006 10:35 am Post subject: How to wire switch |
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Yes just solder those Stan. Remember to "tin" the wires first and then
solder together....Using a short piece of heatshrink over the joint
would be perfect.
Frank
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brian
Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA
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| Posted: Wed May 10, 2006 10:59 am Post subject: How to wire switch |
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Speedy11(at)aol.com wrote:
| Quote: |
I need to attach multiple wires to a rotary switch so as to make an engine
monitor display indications from three inputs. As I look at the switch, I'm not
sure how to connect the wires to the tiny connections on the back of the
switch. I know which places to make connections, just not how to mechanically
connect.
|
Ah, the evil wafer switch. Nasty things those. We hates them forever.
(As a kid I built my own ham and test equipment and would end up wiring
up switches like that with as many as five wafers! It taught me patience
and to take extra care to get things just right the first time. The
first time you have to remove and rewire a wafer switch makes a real
believer out of you.)
Wire and solder is the short answer but there are some other
considerations. If you only have to attach one wire per terminal it
isn't too bad. Two is a pain. Three is impossible. If you have to attach
as many as three wires to a terminal you might want to consider bringing
your connections out to a connector and attaching the rest of your
harness there. A small circuit board is a possibility as well.
Attach all the wires to the switch and then use some kind of connector
or knife splices (on second though, forget the knife splices) to connect
the switch to the rest of your harness. It will just make things a lot
easier to work on later when you need to remove the wafer switch to
clean it or replace it.
Also, my experience is that the terminals on the switch are almost
always oxidized and won't take solder very well. Find some way to clean
and burnish the terminals before putting your wires on there. Failure to
do is it asking for a poor solder joint and failure later. Clean and tin
the terminals then use a solder-sucker to pull off the excess solder.
That will leave a good tinned terminal that will let the solder fully
wet the joint.
Good luck and have fun.
Brian Lloyd
brian HYPHEN yak AT lloyd DOT com
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_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery |
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dennis.glaeser(at)eds.com
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| Posted: Wed May 10, 2006 11:11 am Post subject: How to wire switch |
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Stan,
Those are solder tabs. My process steps would be:
1) slide a piece of shrink tube on the wire (and push a good couple of
inches away from the end)
2) strip the end about 3/8" to 1/2"
3) bend a hook in the bare wires, and hook it in the hole on the tab on
the switch
4) squeeze the wires flat against the tab
5) solder
6) slide the shrink tube over the tab
Bob probably has pictures on how to do this somewhere on his website...
Dennis Glaeser
I need to attach multiple wires to a rotary switch so as to make an
engine monitor display indications from three inputs. As I look at the
switch, I'm not sure how to connect the wires to the tiny connections on
the back of the switch. I know which places to make connections, just
not how to mechanically connect. I'm wondering if there are fast-ons
that are that small or if I'm supposed to simply solder the wires to the
little connections? A photo of the switch is at
http://www.rv-8a.net/electrical.htm. Help anyone?
Stan Sutterfield
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nuckollsr(at)cox.net
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| Posted: Thu May 11, 2006 7:35 pm Post subject: How to wire switch |
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At 03:08 PM 5/10/2006 -0400, you wrote:
| Quote: |
<dennis.glaeser(at)eds.com>
Stan,
Those are solder tabs. My process steps would be:
1) slide a piece of shrink tube on the wire (and push a good couple of
inches away from the end)
2) strip the end about 3/8" to 1/2"
3) bend a hook in the bare wires, and hook it in the hole on the tab on
the switch
4) squeeze the wires flat against the tab
5) solder
6) slide the shrink tube over the tab
Bob probably has pictures on how to do this somewhere on his website...
Dennis Glaeser
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Didn't have one . . . but it's a good idea. Went to the junkbox
and dug up a switch . . .
http://www.aeroelectric.com/Pictures/Switches/Rotary_Soldering_2.jpg
I used to "hook" the wires through terminal holes but after a lot
of years of working with solder-assembled hardware . . . particularly
surface mounted stuff, I found it just as reliable to tack solder
as shown. Use 63/37 electronic grade solder. I strip the wires 1/8",
tin both surfaces at the joint and tack-solder the wire to the
terminal. It's not difficult to get as much or more solder cross-section
in the joint as wires which yields plenty of mechanical strength
and reduces probability of damaging the switch with any attempts
to get a mechanically secure joint before soldering.
The REALLY nice thing about tack-soldering is when it's time to
replace a worn switch (or move a mis-installed wire) you can slit
the heatshrink with a sharp xacto knife and just hit the joint
with a hot iron to detach the wire with a minimum of stress on
the relatively fragile switch terminals.
Bob . . .
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Speedy11(at)aol.com
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| Posted: Fri May 12, 2006 2:05 pm Post subject: How to wire switch |
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Thanks to all who responded. I will follow your instructions, all.
Stan
Do Not Archive
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