REVIEW: QR-E 250W ELECTRIC BOOSTER BICYCLE MOTOR AND B60i AND B70 BATTERY

[blueberry]

So allow me to show my ignorance. If the Qiroll switch is normally open couldn't you just put a simple in-line on/off switch in series with a normally closed brake cut off switch and avoid having to use a NOT gate (I'm not sure if there are normally closed brake cut off switches but I've read that there are)? Would have to know what wires route to the throttle vs mode switch. I don't think that I'd do this myself but Tuono brings up an interesting Q.

I think that would work, if the brake cut off is actually a mechanical switch. The ones I've seen are hall sensor based, but there probably are all kinds out there.

 

[blueberry]

It's easy to experiment on the wires, just get a spare micro-usb cable and strip it to bare wires on one side. Black one is usually ground, and then can figure out which of the green and white ones are throttle vs. mode change/regen by connecting each to the black one and seeing what happens.

 

[EMGX]

Thank you blueberry. I'm not interested in a brake cut-off myself but I dislike the S2 control so I'm going to see if I can make my own. Ordered a 6ft braided USB micro and a couple momentary push button switches that should arrive sometime today. Plan is to put one button on each handlebar grip where index fingers can actuate and see if I like that setup better.

 

[EMGX]

The DIY switch that I posted above works with same functionality as the stock S2 control. If I like it I'll leave it, if not I might try lever actuation momentary micro switches instead of push buttons or one lever actuated for the "throttle" and a push button for the "mode" selector. Easy and inexpensive.

 

[R2D2]

The DIY switch that I posted above works with same functionality as the stock S2 control. If I like it I'll leave it, if not I might try lever actuation momentary micro switches instead of push buttons or one lever actuated for the "throttle" and a push button for the "mode" selector. Easy and inexpensive.

@EMGX, can you share what kind of switch you used? I might want to do the same thing. The S2 switch is too bulky and not comfortable on the handle bar.

I'm still trying to find a good position to mount my motor. The current setup keep rubbing off the rubber tape. I tried some grip tape (not 3M) and the grit are rubbing off too. I tried on both bikes and it was the same. Jason from Qiroll tole me to move the motor closer so it's more straight-up. I can probably do that on my Bike Friday but not on the Birdy.

 

[EMGX]

I just bought what was convenient off of Amazon, two pack of stick on push button momentary micro switches. There are a couple sellers of the same product for $10 or less. Not waterproof, the lever switches that I may or may not try depending on how I like the current setup are even less expensive and waterproof rated.


One of the many available lever action micro switches that I may or may not try, depending.


I had the same poor experience with the stock friction tape and a few brands of grip tape (including 3M safety walk and Gorilla). Sanding belt has worked well with no noticeable evidence of wear or slippage on reasonably appropriate tires for the Qiroll, YMMV.

 

[EMGX]

@EMGX, can you share what kind of switch you used? I might want to do the same thing. The S2 switch is too bulky and not comfortable on the handle bar.

I'm still trying to find a good position to mount my motor. The current setup keep rubbing off the rubber tape. I tried some grip tape (not 3M) and the grit are rubbing off too. I tried on both bikes and it was the same. Jason from Qiroll tole me to move the motor closer so it's more straight-up. I can probably do that on my Bike Friday but not on the Birdy.

BTW, nice bikes and I'm envious that you had the foresight to buy a Pro instead of Mute, wish I had.

Edit: I took a small ride with the DIY actuator and like it. As a bonus the braided cable is somewhat stiff unlike the floppy OEM so routing is neater.