Search found 494 matches

by Solcar
Jul 11 2020 6:45am
Forum: E-Bike General Discussion
Topic: My situation explained
Replies: 12
Views: 128

Re: My situation explained

MikeSSS, For lessening the side load I was thinking that the side of the friction roller shaft opposite of the drill could have a bearing, or a seperate roller shaft supported by bearings on both sides that the output shaft of drill turns, similar to that Stanton. I don't plan on using the drive sys...
by Solcar
Jul 11 2020 12:20am
Forum: E-Bike General Discussion
Topic: My situation explained
Replies: 12
Views: 128

Re: My situation explained

Hi, the situation is that I have about a 200' rise in about 3000' riding run. [...] Even if it's just a 5mph rate going up the side of the road, that's ok. I reckon how I'd do it is with a little geared hub motor (like Q128 48V 201rpm) run at lower than specified voltage, but full current. At 36V, ...
by Solcar
Jul 11 2020 12:10am
Forum: E-Bike General Discussion
Topic: My situation explained
Replies: 12
Views: 128

Re: My situation explained

Markz, I was thinking about a hub motor kit. The hub might be too wide for the rear dropouts. The bike has an aluminum frame which indicates counter to spreading the dropouts. It would be important for me to have a 20" wheel with a geared hub motor in it that has the freewheel cluster and that fits ...
by Solcar
Jul 10 2020 10:47pm
Forum: E-Bike General Discussion
Topic: My situation explained
Replies: 12
Views: 128

Re: My situation explained

Lol. I was liking the way a moderately hard rubber roller was doing when I did some preliminary testing on that last friction drive project.
by Solcar
Jul 10 2020 8:58pm
Forum: E-Bike General Discussion
Topic: My situation explained
Replies: 12
Views: 128

Re: My situation explained

Cool. Earlier I was thinking of getting a Ryobi brushless drill to try to do it with. Your input adds impetus to that idea I was considering using a drill as the basis of a friction drive.
by Solcar
Jul 10 2020 8:19pm
Forum: E-Bike General Discussion
Topic: My situation explained
Replies: 12
Views: 128

My situation explained

Hi, the situation is that I have about a 200' rise in about 3000' riding run. I need to get up that with only light pedaling, because that's all I can do. My legs are too old after all these tough 57 years. I was working on a friction drive project that might have worked but these hills are steeper ...
by Solcar
Jul 06 2020 7:24am
Forum: General Discussion
Topic: "Spin Cycle"
Replies: 0
Views: 59

"Spin Cycle"

https://hackaday.com/2020/07/06/the-spi ... to-e-bike/

/hackaday.com/2020/07/06/the-spin-cycle-washing-machine-motor-converts-10-speed-to-e-bike/

I'm quite impressed. The flat wide motor should help a lot to provide needed torque and reduce RPMs.
by Solcar
Mar 12 2020 2:16pm
Forum: Items for Sale - Used
Topic: [sold] Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA
Replies: 16
Views: 1373

Re: Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA

Thanks - sold I'd feel better going through things like that by private message. The home is in distressed shape. The parts and the workshop nature of the house are the things I wanted to mention in the thread. I think the parts and equipment combined are pretty evenly worth what the house is, all t...
by Solcar
Mar 12 2020 12:10am
Forum: Items for Sale - Used
Topic: [sold] Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA
Replies: 16
Views: 1373

Re: Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA

It has about 50 square feet of work bench. I guess that is a main thing about it. The usefulness of the workshop increased a lot for me once I had gotten the oscilloscopes. That was when my passion for power electronics began to get some design results. I combined measuring on actual circuits using ...
by Solcar
Mar 10 2020 2:57pm
Forum: Items for Sale - Used
Topic: [sold] Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA
Replies: 16
Views: 1373

Re: Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA

I really want to sell the whole real estate property. I think the price can be pretty good for the buyer.
by Solcar
Mar 10 2020 12:37pm
Forum: Items for Sale - Used
Topic: [sold] Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA
Replies: 16
Views: 1373

[sold] Parts-stocked analog electronics workshop house with some former ebike projects on site in S. OH USA

*sold* Fixer-upper to be rehabilitated in a relatively private location. It's stocked full of mechanical and analog electronics parts. Included are three CRT oscilloscopes, former self-designed home-made ebike drive units and controllers, a lot of MOSFETs in factory tubes, plus a lot of other things.
by Solcar
May 30 2019 10:47am
Forum: E-Bike Non-hub Motor Drives
Topic: Friction Drive Project
Replies: 5
Views: 2470

Re: Friction Drive Project

I decided to revive my low power friction drive project. I've removed the first mechanical gain stage. The increased motor windings loss should be offset by lower mechanical loss. The drive roller now is about a 2" rubber instead of a 2½" hard polyurethane one. The increased loss from the normally e...
by Solcar
Feb 12 2018 9:15am
Forum: E-Bike Non-hub Motor Drives
Topic: Friction Drive Project
Replies: 5
Views: 2470

Re: Friction Drive Project

Well, thought it would be good to update on the outcome of the project. It didn't work because the losses were too great. The greatest loss seems to have been from pressing the roller into the tire, even though I used a 2½" diameter one. I wouldn't want to use different tires besides the regular bud...
by Solcar
Aug 06 2017 7:36am
Forum: E-Bike General Discussion
Topic: 2nd Bike w TSDZ2 assistance, this time to help with injury
Replies: 35
Views: 2948

Re: 2nd Bike w TSDZ2 assistance, this time to help with inju

RTIII, I have used a notion that I heard quite a long time ago, that the main thing to consider in the sizing of a bike is that when seated, the feet should be able to reach the ground. That is with only the toes being able to reach and still be flat on the ground, but that is the only part of the f...
by Solcar
Jun 18 2017 2:01pm
Forum: E-Bike General Discussion
Topic: Can a 10W 5ohm resistor take 100V for 3 seconds?
Replies: 27
Views: 2719

Re: Can a 10W 5ohm resistor take 100V for 3 seconds?

Are the results affected by different ohm of different resistors? If for example I use a huge resistor with 5ohm vs 10ohms etc... A 10 ohm resistor draws less current than a 5 ohm. The battery internal resistance is somewhat constant, however. I see it is internal resistance rather than infrared th...
by Solcar
Jun 17 2017 8:25pm
Forum: E-Bike General Discussion
Topic: Can a 10W 5ohm resistor take 100V for 3 seconds?
Replies: 27
Views: 2719

Re: Can a 10W 5ohm resistor take 100V for 3 seconds?

Why not use an incandescent light bulb as an infrared source
by Solcar
Jun 17 2017 5:23pm
Forum: E-Bike General Discussion
Topic: Can a 10W 5ohm resistor take 100V for 3 seconds?
Replies: 27
Views: 2719

Re: Can a 10W 5ohm resistor take 100V for 3 seconds?

Inwo wrote:
Solcar wrote:5 Ohm resistor connected to 100v
Good answer.

Who are these guys. :)
Thank you
by Solcar
Jun 17 2017 4:27pm
Forum: E-Bike General Discussion
Topic: Can a 10W 5ohm resistor take 100V for 3 seconds?
Replies: 27
Views: 2719

Re: Can a 10W 5ohm resistor take 100V for 3 seconds?

5 Ohm resistor connected to 100v
by Solcar
Jun 17 2017 3:47pm
Forum: E-Bike General Discussion
Topic: Can a 10W 5ohm resistor take 100V for 3 seconds?
Replies: 27
Views: 2719

Re: Can a 10W 5ohm resistor take 100V for 3 seconds?

I'm just going to give my answer without looking at the others, so my perspective is fresh.
P = V²/R

= 100²/5

= 10000/5

=2000w

I think that your resistor will burn out before three seconds at that power level since that is 200 times the power rating.
by Solcar
Jun 06 2017 10:42pm
Forum: E-Bike Non-hub Motor Drives
Topic: Friction Drive Project
Replies: 5
Views: 2470

Re: Friction Drive Project

A lot of problems in life have been keeping me from working on the charger/controller unit. However, since I had the car battery jumper devices, I decided to place their outputs in parallel and try out the friction drive using the old 12v lead acid battery-powered controller powered by them instead....
by Solcar
Jun 06 2017 9:39pm
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 5776
Views: 491467

Re: new eZip motor

I hope they hurry with the overcoming aging. It just occurred to me we have another option concerning dual driving a rear wheel. I just remembered that two freewheels can be placed on the pedal (right) side of a wheel hub. One way is two normal freewheels can be squeezed onto the same side of a thre...
by Solcar
Apr 28 2017 8:12am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 5776
Views: 491467

Re: new eZip motor

About loose female spade connectors, often pliers can be used to squeeze them carefully, so they will go on tighter. Squeeze them when they are off of the terminal and try them on, trial and error. If the result is too tight, they can be opened up some with a knife blade.