It is good for practicing soldering because, You want your led's to fit flush to the PCB.Which takes extra time and technique which is great for practicing ! So your work looks good ...

Built this kit in an afternoon, easy build so beginners can do it. Follow instructions on QR code. USB to DC power cord was bad, shorted. Replaced and it works as intended. Kinda boring as kits go, just blinks LEDs in pre determined pattern. Fun though.

Most of my students hadn’t used a soldering iron before so this was a good project for them to learn thru hole soldering. They were very proud of them selves when done The circuit uses bjt, leds, digital TTL ic and 555 time so it’s not hard explain to first class students.

This is a well put together kit with a good printed layout to work fromThe parts are listed at one side and properly noted on the photo reproductions of the printed circuit boardsThe circuit is relatively simple and as printed on the sheet very easy to followI should note that there must have been a change in the design as there were more LEDs than were actually required by the design

Fun product for beginners. Although I found one of the LEDs was reversed so check all items with a multimeter before soldering. Good working practice anyway!

This was a fun kit that my kids didn’t succeed in getting to fully work( she got the center lights to flash). It did improve her soldering skills so I view that as a positive. The transistors are not marked well and she had to reverse solder some connections. Over all the learning on this project was great as she had to reheat solder to remove some pieces which we didn’t know was possible and probably the reason it didn’t fully work as intended.

What's weird is that the outermost ring of lights (the furthest one from the center on each line) only light up on alternate cycles. When I power it on, everything works exactly as intended for one cycle, including those outermost lights. On the second cycle, everything works perfectly except those lights. They light up on the third cycle, fifth, etc. They don't look brighter or dimmer, they don't flicker weirdly, and they don't do anything else to indicate that anything is wrong with the board, the components, or my soldering job.So I guess there's something wrong with one of the ICs, either the IC itself or my soldering.Anyway, even if I was shipped a faulty IC and I technically received a faulty product (although I'm inclined to believe that it's my fault, or the IC was damaged in shipping), it's still a 5 star product. I got the soldering practice, I powered on the device, it confirmed that all my "joins" or whatever were good (except maybe on one of the ICs, if that is indeed the cause of the odd behavior). Great stuff.Also, the instructions could be a little more verbose. I did watch some YouTube videos to get everything figured out. But that's fine.

The circuit design and board is really good, to the point I hardly needed to refer to the instructions, the solder pads are quite small so a fine tip is required, I did this in an evening but I'm too impatient to make it last, there's a LOT of soldering due to the amount of LED's, I found it easier doing 1 row at a time otherwise it gets messy.I had a bit of a game soldering the negative LED leg onto the tiny pad, I would advise adding some flux to make it easier but I managed without.In theory you don't need a multi-meter as the amount of resistors makes sense, though the odd single one was a little confusing, if you follow the instructions and fit the rest then there's only one place left for it to go which is: R1.It works a charm and the little potentiometer lets you vary the speed of the animation, the USB cable option made it easier than faffing around with 4 x AA batteries so I didn't solder the holder (I'm a poet!).The list of uses once it's finished:123Nope I can't think of one but it was really fun to put together and see it working.A great value kit with a ton of parts.

Worked a treat, got me soldering componants nice and quickly in no time. The board is quite well laid out and has various parts that range from easy and tricky to solder in place. The final product looks nice enough, and runs off of the included USB power cable, although this is more for practice than the actual finished piece so its not exactly all that functional just a bunch of blinking lights that you can adjust the speed on.

All parts were included. My grandson was learning to solder with this kit and it held up to his learning. Sometimes he stayed on the contacts a little longer than I would have preferred but the circuit board held up good. Instructions were somewhat less that clear but we made it through. I'm an experienced kit builder so figuring things out wasn't to hard. First time kit builders may have trouble unless they have some help because of the poor instructions.

If you Google proper orientation of LEDs on circuits you will find numerous locations that say the conventional orientation is the Cathode or shorter lead always goes in the Square Hole. See attached photo of conventional LED orientation.But this Kit is apparently very non-conventional, you had better put the flat side of the LED which denotes the Cathode side in the round hole and or the long lead or Anode in the square hole.Read on if you want to know my nightmare with this Non-conventional LED kit.I looked at the diagrams on the one and only sheet of paper instructions and decided to put the anode in the square hole. I had installed 6 of the 8 rows of LEDs and got tired and quit for the day. Next day I decided to google proper orientation of LEDs and found numerous explanations saying the Cathode always goes in the square hole and the anode in the round hole. I wanted to cry, because I had installed 57 of the 73 LEDs wrong. So I thought what the heck, this will give me practice de-soldering and see if I can keep from ruining the traces on the board, while trying to de-solder and clean the holes.One whole day later, I had all of the LEDs out, the holes clean of solder, LED leads clean of solder , but cut since they had already been installed and soldered. No long lead to indicate Anode lead.I began re-installing the LEDs, the conventional way, with the Cathode in the square hole this time. Since the legs were now the same length, because I cut them after installing them the first time, it was hard to see the flat sides of these LEDs which would denote the cathode side, but turning them numerous times in my fingers and dropping them numerous time I thought I had them all correctly oriented.I completed the job and only two lights would flash. I took a close look at those two LEDs and decided I had installed them with the Anode in the square hole and the cathode in the round hole. It is really hard to see that flat side on some of these cheap LEDs! I took those two out and turned them around, but did not solder them since they fit really snug, with a little solder left on the leads and in the holes. Plugged in and no lights flashing. Pulled those two light out and stuck back in with the Anode in the square hole and they flashed. None of the other LEDs did anything because I had installed all of them the conventional way. I then went back and looked at the One and Only terrible sheets of instructions and decided, they do indicate the positive side is on the left which when holding the board so you can read the writing on it would put the anode on the left and in the square hole. Just as I had initially started out doing.Did I try to take all 73 LEDs out again? I finally one day did. Since I now had all the circuitry finished, The capacitors, resistors, transistors and IC installed. I could plug the device in and check each LED location with an LED and they would flash. Some had been ruined during the de-soldering process so I threw them away. Also all the traces On row 6 and the last traces no longer worked at all. I had just enough LEDs to install all but row 6 and the last tow.Once all LEDs were installed. The device worked fine except I did not have row 6 or the last row.Would have been five stars except for very bad instructions and the non-conventional orientation of the LEDs.

Ok

I am a complete novice when it comes to soldering and electronics, so I bought this kit along with a couple of others to practice my soldering technique in advance of a larger (more expensive) soldering project that I can't afford to mess-up. There are a lot of tiny components with this kit and the practice is helping me become a little more steady with the iron and solder, and also helping me learn new ways of placing everything together while soldering the joint.The instructions aren't perfect and have a typo, but it's pretty easy to spot and if you look at the pictures online and read the component list. I had to Google some terms such as "anode" to get the correct polarity on the LEDs, but it's all part of the learning experience. I've attached a color copy of the instructions, which make it a bit easier to follow. The typo is in the first step - The 1K ohm resistors need to go to the R1, R11--R20 pads. This is verified in the component list.Searching for "eqkit lsd-73" will get you the PDF instructions.