Lazarus -
Made me Google, here's another :
Motorcycle traffic light switch - April 22nd, 2008
http://rsinventionlab.com/archives/126
Quote:
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Modern Traffic light work mostly on either timers ( to control traffic), or isolation loops(to “sense” when a vehicle is present). Isolation loops are great for cars because the metal of the car disrupts the resistance of the loop, telling the traffic light that it should change. Motorcycles however do not have enough metal to “interrupt” the signal. Here’s how I changed all that for my bike trips. ...
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CarloSW2