Recent content by JRitt

I built a pack from 2 yr old lipos that were in Defib battery packs (never discharged). The pack is 10s 7p (37v~14ah) because the cells were only rated for 2c discharge. The bike has a cheap 20" 500w ebay kit and it works great. I have no idea how far it will go but he rides it daily in our very...

I'll buy a clamping rear torque arm in 3/8" thick today. weld in replacement clamping rear dropouts in 3/8" would be good also

Yes they are 12v. I just got mine in yesterday and tested them with a 9v transistor battery and the look good. I also saw an LED running/brake light designed for trailers at the local O'Reily's auto. I am picking one up this weekend. EVassemble also has a nice switch assy for turn...

I just bought 2 of these led flashing amber light sets. They seem bright enough and at $13 including shipping for both they are worth a try. http://cgi.ebay.com/ebaymotors/2x-Car-22-LED-Amber-Strobe-Emergency-Flashing-Light-TR-/400161777423?pt=Motors_Car_Truck_Parts_Accessories&hash=item5d2b80270f

First test on my bike I am building I was going down a 13% grade hill ~30mph with the brakes on and the cheap front tire blew (I now have marathons on it). I managed to ride to the bottom with light rear braking and stoped to walk it 1mi back to the house. I still need to replace the front wheel...

Just let her get far enough ahead that she will not see you turn into the bar

Any place that sell computer components (even radioshack)

I believe the police would pull you over and write you a ticket for blinding low flying aircraft

The pump in that unit only draws .12a so its probably going to move ~30gph free flow. I would not want to go with any pump with less than 60gph free flow.

I used to water cool overclocked computers and there are small 12v pumps that can move over 300gph while drawing ~24w. and some that draw as low as 10w moving 100gph. the below site also has radiators sized from 80mm square to 120mm x 360mm...

The biggest problem with a (standby) UPS is they take up to 50ms to transfer power from mains to battery. Most computers (ie. Dell, Acer etc..) use a cheap powersupply that will not keep power going to the computer for more than 15-20ms. There are 3 solutions to this problem. 1) buy an on-line...

It really helps that I'm the guy who replaced them. Can anybody point me in the direction to get a BMS?

I already have a TS 72v 20ah pack for my bike. I was thinking of using this charger. http://cgi.ebay.com/Universal-Smart-2-0A-Charger-36V-37V-Li-Ion-Battery-/250642725494?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item3a5b787a76

I picked up 10 free 2 yr old battery packs (4s3p panisonic CGR18650C) that have been kept fully charged and cycled probably less than 10 times. The packs have a built in BMS and a state of charge indicator that reads full on all of them. They came out of defibrillators that by regulation have to...

I am waiting for my 5305 motor but I have the 72v 65a controller and the 72v 20ah Lipo (1.440whr) battery charged and ready. Photos will be posted after the first check ride.