As a kid, back in the 80s and 90s, I used to get Elenco electronic kits from my Dad and Mom as presents. I had them all, the Digital Roulette (K-25), the Space War Gun (K-10), the Pocket Game Dice (K-28) and many more. Even a few robot kits. Then I discovered lasers and all I could talk about for months was getting the brand new Class II Laser Kit (LK-1).
Of course lasers are dangerous and so both my parents said no, responsibly. I continued to pester them and a deal was struck: I write a report on lasers, about their history and safety, and they would buy it for me. So I went to the library, studied up on lasers, wrote the report, and in 1992 I got it. I was so happy I couldn't believe it.
Well, as chance would have it, I lost the instructions and we put off building the kit for a while. Then the whole thing got forgotten and packed away, lost to me for about 15 years. I found it about 5 years ago while I was moving and surprisingly everything was in mint condition. The instructions were still lost and so I checked the internet every year seeing if the schematics would pop up but they never did.
You see the board has no markings and I didn't have a full parts list, only the parts in the box. So the best I could do would be to reverse engineer the circuit, something I'm not great at. A picture would have helped tremendously but I couldn't even find one of those. Finally I tried looking at the Way Back Machine for even the smallest clue but only found this:
With all hope lost I finally decided to write Elenco for help, hoping that they had the 20 year old plans in their archive. I probably should have tried that first but it never occurred to me. Well wouldn't you know they sent me a PDF of the schematics and instructions the very next day! Suddenly I became a 12 year old again, giddy with excitement. So here I am ready to make a 20 year old dream come true and build that laser kit I begged for as a kid.
So if you're ready then come watch me build this old kit and bring my laser to life!
Step 1: Safety, Tools and More!
Second, the power supply can be dangerous if you use it without the laser connected. Make sure you are careful with the power, you may get hurt. Or shocked. Anyway, pay attention.
If you're going to make one of these you'll need these tools to begin:
- Soldering Iron
- Damp Sponge
- Safety glasses
- Needle nose pliers
- Wire Cutters
Attached are the original instructions and a scan of the educational pamphlet I filled out as a kid. Even though Elenco discontinued this kit in the late 90s I still want to point out that this is their kit and their material. I've included it here in good faith and as documentation for others that may find their own kit hiding after 20 years and want to build it:) Don't be a jerk and try to pass it off as your own stuff. That's my disclaimer.