Recent content by Swordman

Here's a thread on the Long Wheelbase recumbent I built a couple of years ago. It's still pretty much the same but I built a new battery box back in March and went to 3 Milwaukee V28 tool batteries in parallel. I now have over 2000 miles on it and it is still going strong...

Have a look at this thread: http://endless-sphere.com/forums/viewtopic.php?t=233&start=0

The model I selected can sense currents up to 100 amps unidirectional. It says it can survive 5x overcurrent conditions. The internal resistance is 100 micro ohms. Here's a digikey link: http://www.allegromicro.com/datafile/0755-100.pdf I've had it up to 26 amps which is about all my system...

Thanks. I figured I'd start out by making a printed circuit board of the easy part and then move on to the more complicated part once I got this working.

Ok. I have completed the schematic and printed circuit board layout for the sensor unit. I also have created home made circuit boards for the sensor unit using the toner transfer method. The toner transfer method worked well considering this was my first attempt. Attached are some pictures...

It could also be where in the circuit you hooked the meter up. I'm hooking mine between the battery and the controller. If you hooked it on the controller-motor side, you would get a lot of pulses instead of a constant voltage and that could be causing your problem. One of my first tests...

Thanks, I hope to have it working totally some day. I had the same experience you did. I set up a breadboard in the house here, got it working with a low current draw, and then said, hey this thing works I think I'll build a prototype. So, I built the prototype, put the prototype on the bike...

Hi all, I'm getting closer. I just got back from trying a real-world test. Seems to work fine. I got hung up for a while on figuring out why my voltage and current readings were not stable when I went from my breadboard system to my on-bike prototype. I created a sensor unit and connected...

As promised, only a week late, the new and improved Sport Utility Recumbent. $8 Wal-Mart toolboxes can hold a lot of stuff.

Thanks for the compliment. I originally had lead acid batteries above the bottom bar but changed it when I went to NiCad since the battery is so much smaller. I really like everything down low on the bike also. As long as the bike is, it's not like I didn't have plenty of room. :) I...

Thanks. It doesn't have all the features of the drain brain. I chose not to implement the regen stuff. I just don't really think you gain that much from regen. Plus, both my bikes have freewheels, so I don't get regen. I may add a cyclometer function in the future. Bike computers are like...

Hopefully I'll get there. Right now I actually need to have one that I can test on my bike. Not sure about a $$ figure at this time. The printed circuit board will be the most expensive part. I'm gonna do a proto board first and then move on to a printed circuit board.

The meter is set up with four pages, each one may or may not have subpages. The pages are ride, measure, review, and set. The measure page has a subpage that shows volts, amps and watts, and a subpage that shows amp hours and watt hours. The review page has a subpage that shows voltage low...

Mathurin: Thanks. I think it is turning out well myself. knightmb: I'll make a better video in the future and may post it to google video then. This one is a first attempt and the quality is not so great at the end. I may sell them in the future, but right now I actually have to get this...

Ok, Attached is a video showing the meter in action. Software is basically done and I have 1.5K to spare out of 8K total. Just getting started on the prototype hardware. I've realized that I need a smaller tip for my soldering iron and that my soldering skills have either deteriorated over...