Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Discuss Creating brake light for a bicycle in the Science and Space area at ElectrciansForums.co.uk.

Tags:
Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. mothrat1980
    Offline

    mothrat1980 New EF Member

    Location:
    United Kingdom
    Hi,
    I've just joined the forum and hoping someone can help with what I am looking for.
    I'm looking to design a circuit for my bicycle that will cause my rear light to illuminate when I pull on the brake lever. The way I would like to do this is to have a circuit is place that will cause a reistance in the cicuit to keep the light at a slightly lower level of illumination, and when the lever is pulled, the light increases in brightness. I have a very basic knowledge of electronics, so I think it would involve having the resistance decrease when pulled, however I'm not do not know how to have it wired up so when the contact between the lever and the lever housing is pulled the resistance decreases.
    Hopefully my description makes sense and someone can offer advice.

    Thank you in advance.
    David
     
  2. ackbarthestar
    Offline

    ackbarthestar Forum Mentor

    Location:
    A Zoo near YOU
    Generally, a basic lighting circuit requires a energy source, a switch and a load.
    The energy source will be a battery but could be something else such as a small generator.
    The switch will be probably attached to the battery somewhere
    The load is the lamp
    Developing the system would require another switch with either another lamp or a small resistance equivilent to the size of the lamp or slightly larger in parallel with the basic circuit.
    This switch mechanism might be a pressure sensor switch enbedded in the rubber brake lining of a calibre braking system.
    That's a start you can now do the rest......
     
    • Like Like x 2
  3. shaunfriend
    Offline

    shaunfriend EF Member

  4. PEG
    Offline

    PEG Respected Member

    Location:
    Manchester
    Hi,if you are having a switching mechanism anyway,i would not have a resistance running constantly,on the tail light circuit,as this would be wasteful.
    There are many add-on brake light switching designs,some are built in to lever assemblies,which may be simpler,if it is both levers,operating the light.

    As an occasional cyclist,i would say that nobody cares when you brake,but it is turning, which causes abuse and funerals :(
     
    • Agree Agree x 4
  5. ackbarthestar
    Offline

    ackbarthestar Forum Mentor

    Location:
    A Zoo near YOU
    The resistance or separate extra lamp would only become active when the second switch was activated.
     
  6. PEG
    Offline

    PEG Respected Member

    Location:
    Manchester
    Which would mean the brake light was a dimmed version?
    A separate or extra lamp,would be ok.

    I still reckon a weave indicator lamp,or mount/dismount the pavement lamp,would be more use,to the rest of us :rolleyes:
     
  7. Spoon
    Offline

    Spoon Forum Mentor

    Location:
    Lancashire
    Very crude but this video on Youtube may give you an idea...
    There are lots more...
     
    • Like Like x 1
  8. PEG
    Offline

    PEG Respected Member

    Location:
    Manchester
    Never seen anything so elaborate...he never showed the three led's he put in reversed...his leg muscles must be popping,from dragging a brake so he has a tail light as well...and watching that video,has reminded me that me nan's walking stick,needs a castor on the end...
     
  9. Spoon
    Offline

    Spoon Forum Mentor

    Location:
    Lancashire
    It gives the OP some ideas on what to do.
    If I was going to do something similar I would fit the reed switch to the break actuator (or whatever its called) at the back of the bike and stick the battery under the seat.
    I only had a quick look at it as I was off to bed just after I posted it.
    There are lots on YouTube though.
     
  10. Rpa07
    Offline

    Rpa07 3000 posts - only 50554 behind Telectrix! Electrician's Arms

    Location:
    Bristol
    Business Name:
    Ebenezer electrical
    That’s the problem with different braking systems now - when we all had callipers or centre pulls we would use the wheel riM as the continuity to activate our rear brake light.
    Don’t see the point myself, better off making yourself as visible as possible with Hi biz and rear lights. But that’s my opinion as a cyclist.
     
    • Agree Agree x 3
  11. Shoei
    Offline

    Shoei Regular EF Member

    Location:
    nantwich
    Be seen..
    bikehaloa2.jpg
    and if it's a long ride to the next pub..
    2929-8623.jpg
     
    • Like Like x 1

Share This Page

Electricians Directory Post a Domestic Job Post a Commercial Job