Recent Posts

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Coffee Shop / Re: bicis de monta?a el?ctricas
« Last post by Tom Cole on June 21, 2019, 12:40:35 pm »
Thanks for sharing!
Coffee Shop / bicis de monta?a el?ctricas
« Last post by alanstwart on June 18, 2019, 09:19:33 am »
?No te arrepentir?s si te pasas a una mtb el?ctricas! El mercado de las bicis de monta?a el?ctricas est? en plena ebullici?n. Multitud de marcas, tanto conocidas como otras menos populares, est?n invirtiendo una gran cantidad de recursos en esta tecnolog?a. El resultado es que ya mismo se pueden adquirir unos modelos incre?bles. Desde bicis muy especializadas a modelos m?s vers?tiles, desde las car?simas a unidades m?s asequibles, hay un mont?n donde elegir.
Product Showcase / Wattcycles Tube Battery Version 2.0
« Last post by Tom Cole on August 13, 2017, 11:05:38 am »
So this is almost ready.  I've redesigned the tube battery to make it smaller, lighter, less expensive, and with a slightly longer range.  Oh and this one look cool because the outer case is transparent!  That's right, you can see the actual cells!

Basically, a change in battery chemistry allowed me to switch from a 10s4p to a 10s3p due to an increase in capacity and amp output.  The idea of the design is still the same, but reducing the total cells from 40 to 30 means an approximate 25% decrease in diameter, weight, and cost, yet the capacity is theoretically 5% greater!

The reduction in cell count means that each layer of the battery has two fewer cells, so I was able to rearrange them to fit in a smaller diameter CLEAR thick walled PET tube.  This tube is a little more expensive than PVC, but the "cool factor" payoff is worth it.

I've finished the main design including wiring up the BMS and I am about to do some burn-in testing before closing everything up.  While out riding the other day with it, I popped a rear tire and rode 2 miles on a flat rear tire at 17 MPH without pedaling!  The battery and the wiring did not overheat, so I'd say initial tests are very promising.

Here's a pic with the new battery on the bike and the previous version on the floor.
Coffee Shop / CNC machine I built
« Last post by Tom Cole on February 01, 2017, 02:36:22 pm »
I thought some of you might like to see this.  It is called a "Mostly Printed CNC" because all the plastic parts are 3D printed.  The files needed to print the parts are FREE! The metal rails are plain cheap 3/4" emt conduit.  The electronics can all be bought inexpensively online if you can configure them yourself or for a little extra from the machine's designer. I bought most of my electronics and tool bits from him to support his development efforts.

Here is a video of mine:

Ride, Trail, and Club Announcements / Phenomenon Trail - Ft Gaines, GA
« Last post by Tom Cole on December 20, 2016, 10:12:39 am »
This is a 4 mile paved running/hiking/biking/golf cart trail that goes from the lodge parking lot at George Bagby state park to the East Bank public use area (Corp of Engineers) parking lot just north of Fort Gaines, GA along the beautiful Lake Walter F .George (aka Lake Eufaula).  It is mostly flat and fairly shaded.
Ride, Trail, and Club Announcements / Chehaw Trail - Albany, GA
« Last post by Tom Cole on December 20, 2016, 10:07:26 am »
Chehaw Park in Albany, GA has a great 11.25 mile MTB trail.  The trail has several loops that allow shorter rides.  I have ridden this trail with my ebike and although I pedaled most of the time, there were several instances where I was very happy I had a little help when I needed it.  Cost to get in the main park is $3.21 including tax and I think the trail is well worth it.
The park also has a camping area, BMX track, AWESOME playground and a wild animal park built by Albany's own Jim Fowler of "Wild Kingdom" fame.
In The News / New Battery Tech: Five X energydensity @ one-fifth the cost
« Last post by Tom Cole on December 05, 2016, 06:17:54 am »
Product Showcase / Re: Teasers of a battery I'm designing.
« Last post by Tom Cole on November 04, 2016, 08:00:46 am »
This project is done and available here for free:
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