Circuit design for traffic light operation? - youth wire helmet
My church has a light for the construction of youth. We wire them as a stopwatch ... If you are the lights green power for 8 minutes, the yellow light turns on again for 2 minutes, then the red lights come on. I do not know what kind of bulbs you are using a traffic light standard (AC or DC, V, W, etc.) and we try to keep the switch box to / cost of the circuit to a minimum. Suggestions?
Wednesday, January 20, 2010
Youth Wire Helmet Circuit Design For Traffic Light Operation?
2 comments:
This can be) very well done with 3 (Standard Range) Time Delay Relay (green, red, yellow.
When closing a power switch, the normally closed by the light yellow and red light NC, coil around the green light to stimulate (and then neutral). Are activated, the coil of green light (setting min) 8. During this time, the current goes through the relay contact normally open 8 minutes before energizing the green light and neutral.
The yellow relay coil is connected through the green and red NC NC. When both the green green spool normally closed contacts close, energizing the relay yellow. The relay will remain activated yellow min for 2nd The yellow light will be connected through the relay contact normally yellow lights during this time.
The red relay coil is connected through the normally closed contacts green and yellow contacts are closed as a rule. When closing the times Yellow tube Yellow Now normally closed contacts, energizing the Red RealY. The development of beef to remain in power as long as you want. The red light will be connected through the network NO, that is activated during this time.
Then you start the green and so on ....
All tours depart from a power source through contacts, through the coils (or light) and neutral.
As lights, shop lights adapted to the environment. If you do not get a table lamp, use the waterproof fire. When you off on the power LED, s, the work of the less electricity, light or 110VAC good. Make sure that you have the necessary relay for the power you use.
I also enjoyed the answer's rezef. The purchase of a programmable controller is a cost effective option, although the need to minimize costs, quickly ruled out as an option, especially when it must invest time to learn how it works. The logic is exactly the same as I said earlier. Inittiating communication between your computer and the control is problematic. You must also have some knowledge of programming logic.
Eh!Relays are simple, easy and cheap pot. And in the 21st Century still in use.
I enjoyed reading the response Bruz, I remember to do things than in my student days. However, it is a nuisance, and is 1950!
Why not try a small PLC (PLC)? These are small inexpensive devices that are programmed very easily (not really have a graphical programming interface, you'll have no trouble) they learn and are relatively inexpensive, under $ 200. If you want to buy the 3 timers, you will not see much of the price difference.
A quick search on Google showed me this model:
http://www.electrodepot.com/al10mra.htm
What sells for $ 149 and has a display on the device, so not even that programming on a PC contact, but it could in this case, you must use the software for $ 39 and requires cable $ 59
Another result is a model for Eaton's $ 93:
http://www.factorymation.net/s.nl/it.A/i ...
But the software is expensive ($ 99). The cable is 13 U.S. dollars. This requires the software and computer with the program.
Another here:
http://www.plccenter.com / ProductDetail.a ...
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