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Mini Intersection
Well finally, here's a shot of the mini intersection I made for a computer hardware class back in high school. I [url=http://www.galleryoflights.org/mb/gallery/displayimage.php?pos=-4749]mentioned[/url] this a while back but haven't actually gotten around to pulling it out and taking a picture of till now xP. 

The lights are controlled using the parallel port on the computer. The program I wrote for it included a simple graphic which showed which lights were on using the computer screen along with controlling the lights. 

If I remember correctly the program cycled through the two traffic phases unless the left turn was activated by pressing a button on the circuit board on the top left (the circuit board also had the resistors for the LEDs). This added in a left turn phase by flashing the green ball on the light with the "Advanced Green When Flashing" sign. 

The streetlight (a silver shoebox lol) used a white LED and was only for show, I believe it ran off a 9V battery and was separately switched. Oh and the poles are made from copper tubing while the arms are made from wood skewers. The traffic lights are supposed to be 8-8-8s with backplates and was made using cardboard, LEDs, and yellow electrical tape. 

See below for the circuit diagram:
[URL=http://i560.photobucket.com/albums/ss50/joseph_125ON/Meta/80b2bc16.png][IMG]http://i560.photobucket.com/albums/ss50/joseph_125ON/Meta/th_80b2bc16.png[/IMG][/URL] 
(Click to enlarge)
Keywords: Miscellaneous

Mini Intersection

Well finally, here's a shot of the mini intersection I made for a computer hardware class back in high school. I mentioned this a while back but haven't actually gotten around to pulling it out and taking a picture of till now xP.

The lights are controlled using the parallel port on the computer. The program I wrote for it included a simple graphic which showed which lights were on using the computer screen along with controlling the lights.

If I remember correctly the program cycled through the two traffic phases unless the left turn was activated by pressing a button on the circuit board on the top left (the circuit board also had the resistors for the LEDs). This added in a left turn phase by flashing the green ball on the light with the "Advanced Green When Flashing" sign.

The streetlight (a silver shoebox lol) used a white LED and was only for show, I believe it ran off a 9V battery and was separately switched. Oh and the poles are made from copper tubing while the arms are made from wood skewers. The traffic lights are supposed to be 8-8-8s with backplates and was made using cardboard, LEDs, and yellow electrical tape.

See below for the circuit diagram:

(Click to enlarge)

Misc_Tags_MED.JPG MTO_IMG_1946_M.JPG 347V_P5215333.JPG P8032355.JPG COL_CIMG_0702.JPG
File information
Filename:347V_P5215333.JPG
Album name:joe_347V / Misc. Lighting Pics
Keywords:Miscellaneous
Company and Date Manufactured:347V Electric
Model Number:TEJ-4M1 Project
Wattage:Low
Lamp Type:LED
Filesize:146 KiB
Date added:May 22, 2012
Dimensions:1024 x 768 pixels
Displayed:89 times
Color Space:sRGB
Contrast:0
DateTime Original:2012:05:21 23:58:43
Exposure Bias:0 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:1/80 sec
FNumber:f/3.7
Flash:Compulsory Flash
Focal length:6.8 mm
ISO:100
Light Source:Unknown: 0
Make:Olympus Imaging Corp.
Max Aperture:f/3.5
Model:SP600UZ
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=11745
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Comment 1 to 9 of 9
Page: 1

streetlight98   [May 22, 2012 at 10:44 AM]
Very clever work! Do you have a pic of it in action?
rjluna2   [May 22, 2012 at 06:17 PM]
At one time, I did build a digital TTL logic with the 555 timer for two direction traffic signal lights using appropriate color LEDs when I was a teenager back in the late 1970's/early 1980's Very Happy
joe_347V   [May 22, 2012 at 08:09 PM]
Thanks, I unfortunately don't have a pic of it in action though since my current computers don't have parallel ports on them anymore Sad . I built a self contained controller before, using a 555 timer, 4017 counter and some relays but it was only for a single signal head.
streetlight98   [May 23, 2012 at 10:01 PM]
There is one.
joe_347V   [May 24, 2012 at 09:00 PM]
Hmm, I don't get it. Razz
streetlight98   [May 24, 2012 at 10:33 PM]
Cuz rjluna2 asked why there weren't any street lights at the intersection. Razz
joe_347V   [May 24, 2012 at 11:42 PM]
Oh, I see Laughing anyways the only reason I made a shoebox was because a mini cobra would take too long to make out of sheet metal. Razz
streetlight98   [May 25, 2012 at 12:07 AM]
Well a shoebox is a street light is it's lighting a street. Razz I suppose you could make a boxy streelight like a M-250A2 or Unidor. Laughing The only light-up lights i've made were four LED lowbays, two powered off 2 AA batteries, the thrid off it's own 2 AA batteries, and the last one powered off it's own 2 AA batteries. You can see one here The one in the link has a full-sized Poland Spring water bottle cap from the earliest "Eco-Shape" bottle while the other three use the current low-profile Poland Spring water bottle caps. I needed to use the bigger sized bottle cap for the one in the link because the LED was too big for the small cap unlike the three others which have very tiny little LEDs. I personally think the other three with the low profile caps (or lenses as that's what they're used as) look better. I'll post a pic of one of those...
rjluna2   [May 25, 2012 at 12:34 AM]
@Mike: I designed the logic circuit and actually built the circuit with the appropriate circuit with 6 LED's with the breadboard and wires Razz

Back then, I didn't have formal training. But, with my father and the Don Lancaster's TTL Cookbook [Paperback] training, I was able to build the required circuit. I didn't get a formal training until I attended the Digital I class at Summer 2010 at the University with my Computer Engineering major.

Comment 1 to 9 of 9
Page: 1