Turn on suggestions Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
Search instead for
Did you mean:
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page
- All Forum Topics
- Previous Topic
- Next Topic
- «Previous
- 1
- 2
- Next»
Traffic light project for Multisim
Solved!
Go to solution
Traffic light project for Multisim
brett1405
Member
04-25-201105:01 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
Hello, I am trying to design a working traffic light for both N/S and E/W sides of traffic (i.e., six lights). I will build it later, for real, using the Elvis II breadboard. I have been looking around at other schematics on the web, I have drawn many of these on Multisim and none of them work. It also needs to be a U.S. traffic light, as the ones in the U.K. are different. I have tried many different combinations, with the 555 timer and the 4017 decade counter, but I don't know how these components actually work. I need help. The simplest circuit would be better, I know, like some kind of RS flip-flop or JK flip-flop (?). I don't know how these components really hook up together or how I am supposed to get the timing right, where the red and green on opposite times will stay on for a required time, like 15 seconds for demo purposes, and then go to yellow on the side the green was on for 3 seconds ( after the green goes out and the red stays on with the yellow) and then it flip-flops to green and red on the other side for 15 seconds. I don't know how to go about this. A good example would be very helpful. Thank you, brett1405
Solved!Go to Solution.
1Kudo
Message 1 of 14
(22,673 Views)
Reply
Re: Traffic light project for Multisim
Vacrow
Member
04-27-201110:30 AM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
Have you thought about using a PIC?
1Kudo
Message 2 of 14
(22,649 Views)
Reply
Solution
Accepted by topic author brett1405
Re: Traffic light project for Multisim
brett1405
Member
Author
04-28-201102:47 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
Thank you for your reply, but I have the circuit working finally.
I might need your advice in upcoming projects though, as we will be building it with a microcontroller very soon. Thank you, brett1405
0Kudos
Message 3 of 14
(22,632 Views)
Reply
Re: Traffic light project for Multisim
GarretF
NI Employee (retired)
05-02-201107:22 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
There is also a sample circuit in the Educational version of Multisim that implements a traffic light on a FPGA. Click File > Open Samples...then browse toEdu\PLD Sample Circuits\Traffic Light State Machine.ms11.
Garret
Senior Software Developer
National Instruments
Circuit Design Community and Blog
If someone helped you, let them know. Mark as solved or give a kudo. 🙂
1Kudo
Message 4 of 14
(22,593 Views)
Reply
Re: Traffic light project for Multisim
brett1405
Member
Author
05-02-201109:41 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
I didnt get help from any one on here. Also, I dont have Multisim 11. Why mark it as solved, I was the one who solved it and i say so in my post.
0Kudos
Message 5 of 14
(22,583 Views)
Reply
Re: Traffic light project for Multisim
Crebble32
Member
09-14-201111:57 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
Hi -
I am trying to build the same type of circuit in Multisim and am unable to get any simulation to run. The error keeps saying my "timestep is too short", which I have no idea what that means... Do you have anysuggestions? I wasn't able to find the sample circuit in my Multisim versionfor the traffic light either.
I have what looks like a mess of a circuit and I don't even know where to begin to trouble shoot it...
Final Circuit2.ms10 266 KB
0Kudos
Message 6 of 14
(21,914 Views)
Reply
Re: Traffic light project for Multisim
brett1405
Member
Author
09-15-201107:28 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
I'll have to take a look at that file and get back to you and see if I can help. I have a design, but it's kind of complicated to do on Multisim, but i'll take a look at yours anyway. I'll send you the design if I can't help you with yours.
0Kudos
Message 7 of 14
(21,891 Views)
Reply
Re: Traffic light project for Multisim
brett1405
Member
Author
09-15-201107:29 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
I also built the design on a prototype board using IC chips and LED's and it works really good.
0Kudos
Message 8 of 14
(21,890 Views)
Reply
Re: Traffic light project for Multisim
brett1405
Member
Author
09-15-201107:33 PM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
One more thing, when u run the Multisim circuit error check, like u did and got the "timestep too small" error, that usually means your 555 timer is set up incorrectly (i e, you didnt use the right combination of capacitors and resistors, or you got some wiring messed up somewhere).
1Kudo
Message 9 of 14
(21,890 Views)
Reply
Re: Traffic light project for Multisim
Crebble32
Member
09-16-201111:33 AM
Options
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report to a Moderator
Thanks so much! I'll adjust resistor/cap values to see if perhaps its a lack of voltage flow getting to my LEDs.. Initially when I built just the simple 555 circuit I was able to get it to work and light an LED ok, however I couldn't get my frequency where I wanted it... it was either too fast or too slow.
I appreciate you checking it out for me! Thanks again!
0Kudos
Message 10 of 14
(21,873 Views)
Reply
- «Previous
- 1
- 2
- Next»
- All Forum Topics
- Previous Topic
- Next Topic
