Hi everyone.
Im new here so be gentle.
Also new in playing with circuits and for my first project I would like to recreate something similar to this:
http://www.sailsafely.com/photo_and_guide.htm
Im not looking to steal his design, just have an interest in learning circuits and figured I could create something usefull as I do.
Its a simple device that short handed sailors use so they dont hit anyone else (you need to sleep sometime).
You set a time, and it counts down from that. Everytime you look around you reset the unit and it starts again. Once the time expires a quiet beep sounds for 30 seconds to remind you to look around. If you dont hit reset once the beeping cycle ends a loud buzzer or horn is sounded until reset is hit.
The easist way I can see to create it is as follows:
I havent purchased anything yet so a nudge in the right direction to get me started would be helpfull.
Thanks
Gary
Im new here so be gentle.
Also new in playing with circuits and for my first project I would like to recreate something similar to this:
http://www.sailsafely.com/photo_and_guide.htm
Im not looking to steal his design, just have an interest in learning circuits and figured I could create something usefull as I do.
Its a simple device that short handed sailors use so they dont hit anyone else (you need to sleep sometime).
You set a time, and it counts down from that. Everytime you look around you reset the unit and it starts again. Once the time expires a quiet beep sounds for 30 seconds to remind you to look around. If you dont hit reset once the beeping cycle ends a loud buzzer or horn is sounded until reset is hit.
The easist way I can see to create it is as follows:
- Two timers that both start when power is on. The first one lasts the desired time interval (in various periods from 5 to 20 minutes). The second one lasts the same interval plus around 30 seconds.
- When Timer 1 ends a quiteish beep (similar to a watch beep) is emitted until reset button is hit
- When Timer 2 ends a loud horn or buzzer sounds until reset button is hit.
- When reset button is hit the process starts all over by resetting both timers.
I havent purchased anything yet so a nudge in the right direction to get me started would be helpfull.
Thanks
Gary