Recent content by John500

It must be 30 years ago we first heard the term "Cash Flow Scam" It started on TV and then rapidly spread as the internet evolved. Find a supply of a popular item and with an LC (letter of credit) get a locked in price for a large quantity. Get the cash up front, sell the item for your cost...

Without a BMS, how will you monitor and balance that battery? Can you get at each cell?

8A is .5HP and will push a bike very nicely on the flat. I find the work you fellows are doing on the altermotor very exciting. It may not be 99% efficient, but it is one hell of a bang for the buck. If you can design an inexpensive controller that will reduce the field V as the rpm of the...

Not having looked at the BMS circuit, I made the incorrect assumption that the 70mA was shunted to ground. WRONG, the current is shunted across the cell to the next, to the next etc. NOW I get it, but I have a real stupid question? Why don't we parallel charge with a 3.9V (or other precisely...

Is this 70mA per cell or total current? I have found 3 cells .3V low so I am balancing the pack right now. Thanks; John

The stator I showed is junk and has been replaced. My camera batteries went dead so I did not get a picture of the repaired alternator, which was sitting beside it. I am just checking around for an inexpensive source of large alternators for other fellows. After I complete my current project...

Widodo; I took my camera this morning, but only got one shot before the batteries were flat. Spare set of batteries were for wife's camera and did not fit. Overall length is 46cm. Weight @ 55KGs. Sorry for the imperial tape. Could not find metric tape this morning.

If a relay is used to connect the controller, it will only require a tiny bit of power when on. When off, no drain will happen.

I wrap a rag around the fan and clamp the rag with vise grips. Then use an air impact wrench to rattle the nut off. Put a few drops of penetrating oil on the night before? NOT WD-40, real penetrating oil. 50-50 mix of Acetone and Automatic transmission fluid works better than most expensive...

Isn't that 200A controller limited to 22V? http://tinyurl.com/2ds5ncd http://cgi.ebay.com/200A-Brushless-Motor-Speed-Controller-RC-Accessory-ESC-/150428455513?cmd=ViewItem&pt=Radio_Control_Parts_Accessories&hash=item23063c1259

That noise from your video is sooo familiar. I think you need a washer behind the fan to keep it from hitting the case?

You are 100% correct. I am a newbee and as I live on a steep hill, I was interested in the max torque of a Star to get me home on my first build. I was hoping to not have to change to 20" wheels from 26" if I could figure out how to get the torque and gearing correct for my application. If...

IIRC Star (WYE) 1.6 X torque of Delta? Edit; I found many references by searching "delta, star, torque" Here is one; "To get a suitable gear ratio, I think you would have to either do a two stage (complicated and less efficient), get an even smaller sprocket (getting hard to find), lower...