Recent content by Trumpet

magudaman, Agree, you are right, cordless tools of the last few years operate brilliantly for what they are designed to do making very usable alternatives to corded drills and are very reliable when used under typical site use. Read of lots of those motors being burnt out when mixing...

Slick..... :D http://www.youtube.com/watch?v=y8abvlYHK3Q

Knuckles, Another type of thermostat that might be of interest - rod thermostats used in water heaters/immersions - will easily take the current, are light and the metal rod will measure an averaged temperature throughout the pack and thety are variable trip temperature and pretty cheap. Min...

Knuckles, I think it works so well because you are probably using good quality cells that are in good shape - nimh is pretty damn rugged, just susceptible to damage due to incorrect charging - their inverse voltage profile at full charge being the culprit. Whilst all the cells are in good...

Zapat, I think a lot comes down to personal preference and how far you want to go with a protection scheme like this. What you have said about a cluster makes sense. The heat build-up will nearly always be greatest in the middle of a pack - so that is the obvious place to put one trip. Then...

ZapPat, That is why you use a separate charging feed - another positive lead dedicated to charging - say with 3 cut-outs per string (at 25mOhm each) charging at 2A will create a voltage drop of 0.15V, as long as it is consistent (which it will be pretty much) it won't affect the charging...

Found these equivalents. Might even get some samples + postage. :mrgreen: Baozhu Electric Applianes Co. http://www.thermtector.com/probig.asp?id=1 Maximum contact ratings10K(4A/12VDC 3A/24VDC 3A/120VAC 2A/250VAC) Opening Temperature 30~155℃ <-------------------- Lower temp range...

I like this idea, nice and simple, real simple and reliable - it is the thermal condition that causes the problem and this solves it simply . I have some expensive chargers but still don't trust them, some have thermal monitoring, some don't, even when they have there is only one sensor. This...

Have been following Mark W's build and have gone for Avids myself (still building) as easy retrofit, well rec'd brake and prefer a non-hydraulic brake. http://endless-sphere.com/forums/viewtopic.php?f=6&t=1533&p=21702&hilit=+jamis#p21702 What size disk are you using? 203mm looks a must with...

I built a simple resistive force sensitive throttle out of one of these.... Edit - oops wrong link... this is right http://www.robotshop.ca/home/suppliers/Phidgets/phidgets-force-sensor.html Gutted the mechanicals of a momentary switch, and mounted both in a plastic box so that the momentary...