POWER SUPPLY and TIMER

Published:2013/6/21 2:58:00 Author:muriel | Keyword: POWER SUPPLY and TIMER | From:SeekIC

The power supply circuit provides power to the track and has a 12 volt power source for the 555 timer IC that controls the waiting time at each end of the track. NOTE: The circuit does not know when or how fast the train is moving, therefore the timer's cycle times must also include the time for the train to travel along the track in either direction. For example it the train is to wait for 30 seconds at the end of the track, the timer will be set for: The time to travel to the end of the track + 30 seconds.The reversing switch on the power pack itself is only used to set the initial travel direction of the system or to 'switch ends' if the waiting times are not equal. The calculator at the following link can be used to determine values for resistors R1 and R2 and capacitor C1. (LM555 - Astable Oscillator Calculator)



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