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how to install a killswitch with lanyard? The one with the "key that, when pulled out, stops the motor?


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rickharris6 years ago
A 1/4 inch jackplug and socket Wired so the plug shorts out the socket. Works if current is low.
Jack plug and socket can also make an interesting rotating slip ring arrangement for light power or signals.
What motor are you using? How big? What supply?

Rickharris' idea is a clever and cheap solution. Here aer some links to some 4mm plug/socket pairs suitable for his idea:

4mm socket: http://uk.farnell.com/spc-technology/spc15179/test-jack-combination-insulated/dp/1185814

4mm banana plug to fit: http://uk.farnell.com/deltron/550-0100-01/plug-4mm-black-10a/dp/1101101

Though, if you are installing this for safety purposes, you probably want to stop the motor as quickly as possible too, right? In which case shorting the terminals of it and disconnecting power has a braking effect, like used in an H-bridge motor driver.

If you like this idea better, it can be achieved with a few relays controlled by microswitch (or Rick's idea) as the killswitch. Your choice of relays will be affected by the motor you're using, let us know and we can make some suggestions.


lemonie6 years ago

Tie the lanyard to the spark-plug lead, if you fall off it should kill the engine...

L
Jayefuu lemonie6 years ago
Ahhhh. I was thinking electric motor :)
Jayefuu6 years ago
What motor are you using? How big? What supply?

Rickharris' idea is a clever and cheap solution. Here aer some links to some 4mm plug/socket pairs suitable for his idea:
4mm socket: http://uk.farnell.com/spc-technology/spc15179/test-jack-combination-insulated/dp/1185814
4mm banana plug to fit: http://uk.farnell.com/deltron/550-0100-01/plug-4mm-black-10a/dp/1101101


Though, if you are installing this for safety purposes, you probably want to stop the motor as quickly as possible too, right? In which case shorting the terminals of it and disconnecting power has a braking effect, like used in an H-bridge motor driver.

If you like this idea better, it can be achieved with a few relays controlled by microswitch (or Rick's idea) as the killswitch. Your choice of relays will be affected by the motor you're using, let us know and we can make some suggestions.


caarntedd6 years ago
Do you have the switch? If you are looking for one try "dead man switch".
Install it with the instructions that generally come with such items, and wire it up the way the instructions say to. If you want to MAKE that killswitch, I'd recommend a normally closed reed switch (or hall switch, its the one that reacts in the presence of a magnet) inside whichever thing you're trying to kill near where the tip of the killswitch key will be, wire it up in series with the main power supply (or have it do so via relay or transistor), and glue a magnet on the top of your "key".