Buy DIY Traffic Light Kit. 4-way Stoplight with Red, Yellow and Green

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Keep in mind this is a kit, you will need some skills in soldering (or at least the willingness to learn). It took me a couple of hours to put this together, and this was the first time I've done one of these kits in a long...long time. Once up and running, all the lights are timed perfectly. The only thing I can't figure out is how the speed control works. Very cool little desk prop.

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I bought this to build as a Christmas gift, with very little previous knowledge in soldering. With the instructions given and a little bit of a practice soldering this was a very easy project. Easy as pie as long as you take your time.

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This was the first kit my 9 year old soldered. There are many pieces in this kit, but most are diodes and resistors, so it is relatively easy. The main drawback of this kit is that the quality of the PCB (board) is very low. That's where my 30+ years experience in soldering came in... I had to jumper one lead, and solder over a few others before it started to work.

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This was very easy to build while following the supplied instructions. Moderate soldering skills will be required, however you are going to be satisfied with your results. The potentiometer allows for varied speeds of light changes allowing you to use the traffic light in various methods. As described and cleaver and fun to build.

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My experience thus far with soldering electronic projects consists of completing three projects when I was in high school (approx 20 years ago) and then completing three more projects recently. My solder joints look ugly but they work well. Therefore I consider myself something of an advanced beginner at soldering but not quite at the intermediate level!

This project was a good match for my skills. It required creating about 120 soldering junctions on a somewhat cramped board. Fortunately, the board was pre-treated with that solder resist coating that helps keep the solder just in the spots where its supposed to go. That made the work a lot easier and I didn't end up creating any solder bridges.

The board and all of the components are included along with sparse but fairly easy to understand directions. There were no missing parts. You will need to supply your own solder, soldering iron, 9 volt battery, and wire snips. There was no troubleshooting guide included but fortunately (and unusually) for me, the project worked well on the first try. I estimate that it took me about five hours to complete the project and I found it good value for the money.