Drop bar controls set up

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abecrizer   100 mW

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Location: USA, Back Waters of Northern CA

Drop bar controls set up

Post by abecrizer » Jun 09 2016 3:08pm

Hello I am trying to figure out the best way to set up my e-bike controls (throttle, brake sensors, lcd screen) on a road bike with drop bars.

I am wondering if folks can post pictures or descriptions of what they have done so I can get ideas for best way to do it.

I currently have bunch of the stuff taped to the stem until I can figure out a good enough plan to make redoing the handle bar tape worth it.

For info on my bike see:
https://endless-sphere.com/forums/viewt ... =3&t=81087
E-bikes aren't for people who like bikes, they are for people who like zip ties.

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leew   100 mW

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Re: Drop bar controls set up

Post by leew » Jun 09 2016 3:17pm

If you want to mount a twist throttle to the tops of your drop bars you could use a divisible drop bar such as the van nicholas bars http://www.vannicholas.com/componentsde ... ntelements
Building: Quest XS E-45, 3854Mpge (imp) (estimated) at 25mph.

__NATE__   1 µW

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Re: Drop bar controls set up

Post by __NATE__ » Jun 09 2016 3:18pm

this is how i did it:

http://imgur.com/a/UpXlZ

Raged   1 kW

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Re: Drop bar controls set up

Post by Raged » Jun 09 2016 6:56pm

This is how I did mine :

Focus Black Forest 29er - MAC10T 14S Lipo - 50km/h, 50km range. (dead)http://endless-sphere.com/forums/viewto ... 91&start=0
Cube Reaction 29er Cyclocross BBS02 http://endless-sphere.com/forums/viewto ... =6&t=70549

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motomech   1 GW

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Re: Drop bar controls set up

Post by motomech » Jun 10 2016 5:54am

A number of years ago, a member here ran a short cable from the frt. shifter to a throttle ASM (maybe a thumb) that was in a sm. bag.
It was so long ago that, unfortunately, I don't remember his name.
Motomech

'03 Rocky Mountain Edge 2WD 260 Q100H frt and Ezee V1 rear 2 Elifebike 20A & 25A 9-FET controllers 12S/10Ah Multistar Lipo rear 4Ah Turnigy frt Luna Cyclops Extra lite Alex 24DM rims, Crazy Bobs run ghetto tubeless. 25 mph. Mean Well HLG-320H-54A
https://endless-sphere.com/forums/viewt ... =3&t=83430
'07 GT Idive 4 4.0, Q100C 201 14S LiPoly elifebike 9-FET 20A controller. 23 MPH.
https://endless-sphere.com/forums/viewt ... 4#p1378484

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dogman dan   100 GW

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Re: Drop bar controls set up

Post by dogman dan » Jun 10 2016 6:36am

It kind of sucks that the industry still hasn't really come up with throttles and e brake handles made for drop bars.

There are brake switches that install in line on the cable, but where to get them and how they work I don't know.

I'd like to see a tiny trigger throttle, that could mount on the bottom of the drop bar, rather than a twist or thumb twist.

Meanwhile, I continue to suggest converting the bike to a flat or low rise MTB bar. Many riders use the top of drop bars 90% of the time anyway.

If you still want low ish, riser bars upside down.

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dogman dan   100 GW

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Re: Drop bar controls set up

Post by dogman dan » Jun 10 2016 6:47am

Just saw this, on another thread today.
Drop bar throttle adapter.jpg
https://endless-sphere.com/forums/viewt ... =3&t=81086

abecrizer   100 mW

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Location: USA, Back Waters of Northern CA

Re: Drop bar controls set up

Post by abecrizer » Jun 10 2016 9:26am

Thanks guys, you have given me somethings to think about.
E-bikes aren't for people who like bikes, they are for people who like zip ties.

Raged   1 kW

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Re: Drop bar controls set up

Post by Raged » Jun 10 2016 10:36am

dogman dan wrote:It kind of sucks that the industry still hasn't really come up with throttles and e brake handles made for drop bars.

There are brake switches that install in line on the cable, but where to get them and how they work I don't know.

I'd like to see a tiny trigger throttle, that could mount on the bottom of the drop bar, rather than a twist or thumb twist.

Meanwhile, I continue to suggest converting the bike to a flat or low rise MTB bar. Many riders use the top of drop bars 90% of the time anyway.

If you still want low ish, riser bars upside down.
The other option was 3 waterproof small buttons wired up with some resistors in a voltage divider setup. Button 1 would be 2.5v, button 2 would be 3.5v and button 3 would be 4.5v (max throttle). Much smaller, cheapish and you could position them anywhere or have 2 buttons placed in different spots for full throttle.

I was going to wire something up, but found my setup works fine and decided riding around was more fun...
Focus Black Forest 29er - MAC10T 14S Lipo - 50km/h, 50km range. (dead)http://endless-sphere.com/forums/viewto ... 91&start=0
Cube Reaction 29er Cyclocross BBS02 http://endless-sphere.com/forums/viewto ... =6&t=70549

abecrizer   100 mW

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Posts: 41
Joined: Oct 19 2015 10:30am
Location: USA, Back Waters of Northern CA

Re: Drop bar controls set up

Post by abecrizer » Jun 10 2016 1:25pm

Ok cool, I get what you are saying Raged. That is beyond my electrical sophistication but I am sure I would learn a lot figuring it out. (or I could
ask my engineer brother how to do it, struggle to understand what he is talking about, ask too many questions to the point he will build it so I will
stop bothering him.)

I also considered a throttle without a return spring like I have now, so you set a power level and leave it, but with a push button switches
to connect the circuit in convenient places on the flat and near the brake levers.
In other words, Set the throttle, but no voltage returns to the controller unless you press either of the two buttons. If you need it to stop you just let the
spring loaded buttons go...

Your bike looks really cool by the way Raged.
E-bikes aren't for people who like bikes, they are for people who like zip ties.

Raged   1 kW

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Re: Drop bar controls set up

Post by Raged » Jun 11 2016 9:26pm

abecrizer wrote:Ok cool, I get what you are saying Raged. That is beyond my electrical sophistication but I am sure I would learn a lot figuring it out. (or I could
ask my engineer brother how to do it, struggle to understand what he is talking about, ask too many questions to the point he will build it so I will
stop bothering him.)

I also considered a throttle without a return spring like I have now, so you set a power level and leave it, but with a push button switches
to connect the circuit in convenient places on the flat and near the brake levers.
In other words, Set the throttle, but no voltage returns to the controller unless you press either of the two buttons. If you need it to stop you just let the
spring loaded buttons go...

Your bike looks really cool by the way Raged.
To give you a head start...

There's 3 wires for throttle.

+5v
Signal ( depending on your controller, the range is between 1.5v for min throttle to 4.5v max throttle )
GND

So you wire a resistor and button in a voltage divider setup between the 5v and gnd so that the outvoltage for signal is your desired throttle voltage.

eg... to get 3.3v out to signal :

Image

have more switches in parallel and change the r1 resistor to adjust the voltage out ( or use a small trimpot to fine tune ).
Focus Black Forest 29er - MAC10T 14S Lipo - 50km/h, 50km range. (dead)http://endless-sphere.com/forums/viewto ... 91&start=0
Cube Reaction 29er Cyclocross BBS02 http://endless-sphere.com/forums/viewto ... =6&t=70549

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