Unfortuneately, others could not. Tired of rear-end repairs, Bob designed an automatic flasher that uses a pressure sensor in the brake line to measure the pressure applied to the brake pedal. The sensor output controls the rate of a 555 multivibrator chip, which in turn drives a high-power MOSFET in series with the brake lights. The harder Bob brakes, the faster his brake lights flash, and hopefully the harder the people behind him brake.
|Brake Warning System Parts List|
|Amt||Part Description||Allied Part #|
|1||Capacitor .001 muF||852-1145|
|1||Capacitor 10 muF||852-5683|
|1||Capacitor 1 muF||852-5677|
|2||Resistors 221 KU||296-0024|
|3||Resistors 100 KU||296-0011|
|1||Resistor 100 U||296-0007|
|1||Resistor 332 U||206-0031|
|Additional parts required: transport vehicle with brake lights|
For Bob Walter's complete instructions on how to build a brake warning system, go to http://www.designnews.com/contents/pdf/gadget102504.pdf.