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Homemade, with turn signals

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Old 09-15-14, 05:37 AM
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cradom
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Homemade, with turn signals

Mike Fenwick - Bicycle Turn Signals
Looks like an interesting project. Found on Hack-A-Day.
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Old 09-15-14, 12:19 PM
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So delete the other one , why did you double post ..?

https://www.bikeforums.net/general-cy...g-diy-ers.html
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Old 09-15-14, 01:21 PM
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That dude really seriously needs to do two things:

Learn to program microcontrollers

Get some better LEDs - those are extreme weak sauce.
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Old 09-15-14, 02:21 PM
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Originally Posted by ItsJustMe
That dude really seriously needs to do two things:

Learn to program microcontrollers

Get some better LEDs - those are extreme weak sauce.
One more thing...learn to use hand signals.
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Old 09-15-14, 03:06 PM
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Originally Posted by ItsJustMe
That dude really seriously needs to do two things:

Learn to program microcontrollers

Get some better LEDs - those are extreme weak sauce.
Better yet something simple like an LED flasher chip.

But I'd visit the auto parts store for the signal LED. (with something like this 12V flasher)
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Old 09-15-14, 06:47 PM
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Originally Posted by wphamilton
Better yet something simple like an LED flasher chip.

But I'd visit the auto parts store for the signal LED. (with something like this 12V flasher)
That's not really better. With a microcontroller you can do absolutely anything you can imagine. With that, you can blink at 1 hz, and only up to 3 LEDs (though of course you can push it through a mosfet or something).

Also with the microcontroller, you can use PWM to do the equivalent of current limiting rather than using a resistor. This will greatly increase your battery life.
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Old 09-15-14, 07:20 PM
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Originally Posted by ItsJustMe
That's not really better. With a microcontroller you can do absolutely anything you can imagine. With that, you can blink at 1 hz, and only up to 3 LEDs (though of course you can push it through a mosfet or something).

Also with the microcontroller, you can use PWM to do the equivalent of current limiting rather than using a resistor. This will greatly increase your battery life.
If all you need is a blink, a blinker chip requiring no supporting circuitry or programming really is better,
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Old 09-16-14, 10:33 AM
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Originally Posted by wphamilton
If all you need is a blink, a blinker chip requiring no supporting circuitry or programming really is better,
Well, except for the increased battery life you can get with a microcontroller.
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Old 09-23-14, 07:51 AM
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Originally Posted by alan s
One more thing...learn to use hand signals.
From the article:

"and the turn signal has caused cars to slow and allow my lane change on numerous occasions, where before the hand signal indicating my desire yielded no results at all."

Not all motorists (or cyclists) out there also know what the hand signals mean.
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Old 09-23-14, 09:52 PM
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I don't use arm signals because it removes my ability to cover my brakes. Arm signals make much more sense in cars where your ability to brake(and even stay upright) is not affected by the removal of the arm/hand from the steering apparatus.
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Old 09-24-14, 04:42 AM
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Originally Posted by ItsJustMe
Also with the microcontroller, you can use PWM to do the equivalent of current limiting rather than using a resistor. This will greatly increase your battery life.
You need a DC/DC converter circuit to achieve better efficiency, using a micro isn't required for increased battery life.
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