gblast123 wrote:A key switch? on a DIY bike ? I can't afford an A2B.. and most bikes sold in cheapo kits, like mine, had no separate power switch on the controller.
On CrazyBike2, I just used an old keyswitch I found in a junk box, originally from a Briggs&Stratton something-or-other according to the key, so it cost me nothing. I wired it up to the "ignition" wire on the controller (the thin red power wire, rather than the main power wire). Then I installed the switch into my hollow steerer tube on the handlebars, using foam tape around the switch to hold it in place.
On DayGlo Avenger, I used a cheap Chinese keyswitch donated to me, and I wired it directly in series with the actual power to the Lyen 6FET controller. The switch is probably a $10 item at most, and isn't very great quality, but it hasn't failed yet, despite the loads I am putting thru it, up to 30A or higher momentary peaks and 4-8A constant. I would actually recommend only using it like I did the one above, to cut the "ignition" wire.
You could even use the keyswitch off of an old computer case--lots of "generic" computers used to have a keyswitch with electrical contacts built in, that can easily be removed from the case an mounted on the bike. A portion of the casing can be cut off around the siwtch, and used to make the mounting plate, if necessary. Even nowadays some computer stores still sell separate keyswitches to add on, and some cases sold by Antec and the like also have them installed, but there are so many old computers laying around as trash that it's easy to find one that has the switch...harder to find one with the keys still with it, though, unless they were left inside or as many old Compaqs came--with the key on a ring on the fan exhaust grille.