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Old 15-05-2018, 06:55 PM   #1
oncomin5torm
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Default Mimic Board switches

Hi

As you can see from the above picture I have installed the switches (can be removed easily though) to the mimic board.

I need to wire up the common return to the centre peg (correct term?)
I am a little lost how to do it, I have 16/0.2mm wire and 24/0.2mm, I was to believe a common return should be a larger wire but it is quite big for these mini switches.

Any advice would be great.

Also where do I make the common wire go to? or does it just end at the last switch? same for the point motor common return, where does that go to make the circuit?
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Old 15-05-2018, 07:08 PM   #2
Steve M
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Presumably they are for your point motors?

You just need to link the centre tags in a ‘daisy-chain’. I have done this in the past using quite thick wire and with careful soldering there is enough space. Tin the wire and terminals first as you don’t want to have the iron on the terminal too long - it will melt the switch body.
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Old 16-05-2018, 08:29 AM   #3
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The technique for soldering closely spaced pins such as on ICs depends on which hand you hold the soldering iron. If you are right handed start at the leftmost pin and work your way to the right soldering each pin in turn, this method ensures you cannot unsolder the previously soldered pin with the back of the irons tip. If you are left handed the technique is the opposite way.

I agree with Steve regards pre-tinning the wires, it enables you to hold the wire against the pin and simply add heat to remelt the solder to complete the joint.

Richard
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Old 16-05-2018, 08:31 AM   #4
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Thanks for the tips.

I've managed to get it all sorted out now.
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