tag:blogger.com,1999:blog-13887692.post5822956825511952108..comments2024-03-13T02:16:08.135-04:00Comments on Cozy Beehive: DIY Electronic Shifting Bicycle Part IIRon Georgehttp://www.blogger.com/profile/18394865788996482667noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-13887692.post-30158209720410033792010-11-05T15:08:51.612-04:002010-11-05T15:08:51.612-04:00That´s a great idea, nothing is wrong you just can...That´s a great idea, nothing is wrong you just can make it better. <br />Congrats!!!!Dexterhttps://www.blogger.com/profile/02923578199179782175noreply@blogger.comtag:blogger.com,1999:blog-13887692.post-45176264793628645542009-12-03T16:18:46.573-05:002009-12-03T16:18:46.573-05:00He's doing it wrong... sorta.. He's using...He's doing it wrong... sorta.. He's using just a servo controller to do this. <br /><br />done right, you'd use a servo motor to drive a worm gear. That gear would drive a pinion that moves the derailer. Worm gears don't accept back torque. That means power to the servos could be shut down between shifts, and would elmininate parasitic power draw. <br /><br />Also this setup needs a microcontroller, the auduino is a bootloader package for an avr, a fairly high end avr, which is wildly beyond what's necessary for a rig like this. Even a 16f84 could do it :-) <br /><br />I bought a bike a few weeks ago. I'll let you guess what that bike is is being used as a test mule for.Nerobrohttps://www.blogger.com/profile/00871626085093440730noreply@blogger.comtag:blogger.com,1999:blog-13887692.post-68112326803685190532009-11-11T21:18:10.268-05:002009-11-11T21:18:10.268-05:00Lachlan : I think you have the gold. This is where...Lachlan : I think you have the gold. This is where the power of microcontrollers come in.Ron Georgehttps://www.blogger.com/profile/18394865788996482667noreply@blogger.comtag:blogger.com,1999:blog-13887692.post-2812777363079330662009-11-11T00:09:08.183-05:002009-11-11T00:09:08.183-05:00Power consumption may be an issue, but this sort o...Power consumption may be an issue, but this sort of project really sounds like it would be well suited to include an <a href="http://www.arduino.cc/" rel="nofollow">Arduino</a> for processing duties. I note there is a <a rel="nofollow">servo control library available</a>, which should take care of some tricky programming.<br /><br />Having some sort of programmable control unit would no doubt make lots of other cool stuff possible. Some Di2 type features; Auto trimming of front derailleur, time changes to match the shift ramps, overshift slightly, etc.<br /><br />Anyway, nice work Norbert.Anonymoushttps://www.blogger.com/profile/16339865381830575501noreply@blogger.comtag:blogger.com,1999:blog-13887692.post-14413383645848385452009-11-10T23:23:34.563-05:002009-11-10T23:23:34.563-05:00"In German, the verbs are at the end of the s..."In German, the verbs are at the end of the sentence, so you never know what the bastards are up to until it's too late" I like what he has been up too. He has mad skills.Jaredhttps://www.blogger.com/profile/09741727415736471911noreply@blogger.comtag:blogger.com,1999:blog-13887692.post-18324385386595501992009-11-10T22:41:41.034-05:002009-11-10T22:41:41.034-05:00Crazy German mad scientist stuff. I LOVE IT!Crazy German mad scientist stuff. I LOVE IT!Yokota Fritzhttps://www.blogger.com/profile/04808661100114872654noreply@blogger.com