isn't 2A enough? http://www.gatewaycatalog.com/cgi-bi...348&type=store
Originally Posted by jasl90
Could you forego a relay and just use an industrial grade moment-micro switch?
Last edited by JZXJ; 04-10-2012 at 06:35 AM.
2A would be fine most of the time. My biggest concern w/ a 2A relay would be longevity.
A freshly charged battery would kick out 4.2 volts which means that I'd hit the 2A limit with a 2.1 Ohm atty. A Cisco 1.5 would push it all the way to 2.8A.
I'm by no means an expert, but I've always been advised to select a device w/ double the amps rating of what you expect to need. Since a 5A or 6A relay is simply too big that's not an option.
As momentary switch... I've never seen a tack switch rated more than 50mA. The larger 3A momentary switches are either ugly as hell and stick out too far, or too expensive.
If I could find a good deal on something like this, I'd be all over it...
Have you consider a snap-action switch? Miniature snap-action switch - Wikipedia, the free encyclopedia
They're my favorite switch type - Digikey sells hundreds of them that handle high amperage, they have a satisfying click and they are cheap. The only issue is finding a button to activate it - you can use your imagination though. I've used the actuator from a tactile switch to a pin from a shelf hook: http://www.homedepot.com/webapp/wcs/...5f%2d100544240
Just hit that pin with a hammer and it pops right out - makes the perfect button for a snap-action switch.
Now you're talking!
Saw some 5A versions on eBay for $2.
May have to go ahead and pull the trigger.
YOu could take the airbags and seatbelt out of your car too, but I wouldn't recommend it.
Originally Posted by slimest
While the MOSFETs in the eGo boards usually fail in the open/off mode (when they fail), they have been know to fail in the closed mode. I'd want to have the additional protection of the PCB myself, just in case.
Li-ION is normally only 1C discharge. If you want more you need LIPO. You can get up to 60C now days but are more volatile. Mostly used in RC for a Ton of power.
Tags for this Thread