i cant really describe the project we're supposed to do..
but we had to make a small car (an object with wheels-2 at the back and 1 in the front) with a pilot lamp
everytime the wheel travels 1/2 of its circumference (circumference of the wheel) the pilot lamp turns on..if it goes full cycle, then it turns off..then if it goes 3/2 it goes on again..
but when the mini car stops, the light doesnt turn on too..
can someone explain how to do that.?? i dont know how to relate the turning of the wheel to the lamp..we also need at least 2 thyristors to do that..i guess it has something to do with the firing delay angle and conduction angle but i really dont know where to start..it is to be submitted 1 week from now..please..help

 

Hall effect sensors; 555 timers - just to get you started. I don't have much time to devote to this right now however!

 

i have read about 555-timers..my prob is i dont know how to connect it to the wheels.!

 

hey.!! thanx..but everytime the wheel stops, the half turn 'marker' of the wheel changes..does it matter.?? thanx thanx thanx