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eBike brake light?

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Easy-X
Formerly known as
HardlyDavidson



Joined: 08 Mar 2019
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PostPosted: 13:52 - 15 Mar 2019    Post subject: eBike brake light? Reply with quote

Hey guys,

I was thinking of wiring up a brake light and possibly indicators.

Any thoughts?
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Honda Rebel, Fazer 600, Keeway Superlight 125, 50cc turd scooter, 1500W ebike (stolen)
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 14:47 - 15 Mar 2019    Post subject: Re: eBike brake light? Reply with quote

I'm guessing it's not fully road legal.

That being the case, you might want to question if you want to make it more obvious what it is.
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Easy-X
Formerly known as
HardlyDavidson



Joined: 08 Mar 2019
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PostPosted: 15:34 - 15 Mar 2019    Post subject: Reply with quote

at 1500W and >30mph probably not Razz

Mmmm, that is a point I was thinking on. Also, the DVSA spec for mopeds is that indicators are optional so probably good to follow on from that logic.

So, just a rear light wired into the battery yes but brake light as well?
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Honda Rebel, Fazer 600, Keeway Superlight 125, 50cc turd scooter, 1500W ebike (stolen)
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 15:48 - 15 Mar 2019    Post subject: Reply with quote

You can register it as a motorbike to make it legal.

Though it's easier if it's 1000W or under.

I can see the utility and have thought about similar.

But I can also see the downsides.

How about a brake light and indicators to go on a helmet, if you wear one? Makes it less obvious.
(Not sure if such things exist - I've 'invented' them in the past, so sure others have too Smile .)
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Ste
Not Work Safe



Joined: 01 Sep 2002
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PostPosted: 15:59 - 15 Mar 2019    Post subject: Reply with quote

You can get lids with indicators and brake lights built in, aftermarket stick on ones must exist and I might do some looking on Google later.
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Easy-X
Formerly known as
HardlyDavidson



Joined: 08 Mar 2019
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PostPosted: 03:46 - 16 Mar 2019    Post subject: Reply with quote

I've had a dig through my parts bin and found I bought a bicycle rear light with indicators ages ago. A tiny little Chinese made thing, controlled by a wireless switch clipped to the handlebars.

Probably sensible to stick with that rather than draw attention to the thing Smile As it is I have to slow down as not to embarrass the smaller cars Very Happy
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Ste
Not Work Safe



Joined: 01 Sep 2002
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PostPosted: 16:46 - 02 Apr 2019    Post subject: Reply with quote

Lidl are selling lids with brake lights and indicators.

https://www.lidl.co.uk/en/MiddleofLidl.htm?articleId=21302&ar=6
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GettinBetter
Derestricted Danger



Joined: 20 Jun 2019
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PostPosted: 15:13 - 20 Jun 2019    Post subject: Reply with quote

HardlyDavidson wrote:
at 1500W and......


I recently built my own Li-on battery pack, utilizing the original casing. I managed to get 126 x 18650 cells in it (14S9P) 58.8V@31.5Ah. I also put in a fan for cooling triggered by three 50 degree thyristors mounted along top & uses a BMS.
I haven't got as far as lighting yet, as I haven't thought through the charge/discharge plus voltage dropping issues, and how to do it nicely.
So far I bought some lighting kits off fleabay
https://www.ebay.co.uk/itm/Bike-Lights-Set-USB-Rechargeable-Waterproof-Front-Bicycle-Lights-Headlight/293071083719?hash=item443c65d8c7:g:YxAAAOSw7aNcyVVS[/url]

I have dropped the 50V to 15V for the cooling fans, (also fitted in the box housing the controller) using this little circuit..
https://www.ebay.co.uk/itm/10A-DC-DC-6-5-60V-to-1-25-30V-Adjustable-Converter-Step-Down-Module/143020349715?hash=item214cad5913:g:DkQAAOSwVRxb83Td
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Easy-X
Formerly known as
HardlyDavidson



Joined: 08 Mar 2019
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PostPosted: 17:36 - 20 Jun 2019    Post subject: Reply with quote

Forgot to update: yes I now have working night-time lights (front and rear) running off the main battery. Brake levers now correctly activate the rear 2 stage lamp. Optional ebrake only via push button and flashing rear indicators.
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GettinBetter
Derestricted Danger



Joined: 20 Jun 2019
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PostPosted: 19:03 - 20 Jun 2019    Post subject: Reply with quote

HardlyDavidson wrote:
... I now have working night-time lights (front and rear) running off the main battery.


Nice one, what did you use to drop the voltage, or are they connected to outputs from the controller? I've seen controllers with outputs for lights, so I presume they're 12V or maybe 5V USB , Laughing the options are amazing, oh and are they LED/CREE/etc.

Quote:
Brake levers now correctly activate the rear 2 stage lamp.

Cool my brake levers have micro-switches to cut out the power when braking (didn't yours), although seeing as the PAS doesn't seem to work (as I don't need to pedal), maybe they don't either. Will check tomorrow.

Quote:
Optional ebrake only via push button and flashing rear indicators.
Thanks for the update, its great to hear other people are also interested in these machines.
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Easy-X
Formerly known as
HardlyDavidson



Joined: 08 Mar 2019
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PostPosted: 20:40 - 20 Jun 2019    Post subject: Reply with quote

My controller has a switchable 48V output for the lights. Both the front, back and indicators can take 24 to 54V (built in regulators I guess) and are just off the shelf Chinese tat.

The brake light was a bit harder. I re-wired the original switches to go through an opto-isolated 5V relay to activate the brake light whilst still retaining the original motor cut-out function. (You can steal a 5V supply from the throttle cable.)
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