I Made Electronic Clocks with my Son

It’s always a challenge to find things to do with a teenager just going through his first year at college. What could ye ole dad provide that more interesting than his new experiences with friends, classes and living away from home? So it was with some trepedation I reached out to Zach and asked if he’d be interested in taking a soldering class with me at MakeIt Labs, the makerspace I’ve been frequenting the last two years or so.

The class was presented as a 3 hour introduction to soldering techniques and best practices. The lab would provide all the tools needed (soldering iron, tools, solder, and other bits), as well as the parts to build a nice little LED clock. This isn’t a ‘here’s your parts, you figure it out’ event, it was a guided walkthrough of basic technique, pitfalls to watch out for, and detailed instructions on assembly. Sounded like a great way to learn how to solder, as well as something we could do together.

“Sure Dad, sounds great. Lets go!”

So I signed for the class, and on Saturday Zach and I headed up to the lab and settled in at our stations.

Each of us had our own kit, consisting of about 30 parts, a printed circuit board, red retro LED displays, and a powersupply. The workstations were well supplied with a very good soldering iron, solder, wire snips, flux, needlenose pliers, board holder, and other small tools. Zach and I, along with 6 or so other students, got started. I had some experience soldering, having done lots of drone builds that require a fair amount of soldering work, but nothing this detailed, and certainly not mounting components on a PCB. Zach had none at all.

Our instructor had prepared well, with a full presentation on what we were going to do, what tools we’d be working with, and basics of how to use the materials and follow the instructions. After a 15-20m introduction on the hazards we should be careful for (“Soldering irons are hot, mmkay? They make other things hot too. Be careful!”) we got started. The first couple components were dirt simple. Just jumper wires across the board. After that we moved on to more and more detailed things, culminating in mounting the socket for the CPU and installing the chip. Through it all, Bill, our instructor, was patient, detailed, and obviously an expert on the subject. He answered all questions professionally and patiently, and, along with lab assistant John, helped the students when problems came up, or simple inspected work to make sure it was going okay.

Finally, after 2 hours of assembly, we were ready to test the boards out. Bill used one of the lab bench power supplies, and one by one, each student brought their board up, and it got powered up. Zach’s worked on the first try, showing bright glowing red LED digits ticking away time perfectly. Mine, of course, didn’t, and we quickly discovered 3-4 bad solder points. I went back to my bench and fixed these, and my clock came to life as well.

The kits were from a standard hobbyist supplier, and were meant for student workshops like this. they didn’t come with mounting hardware, so before the class started, Bill and John thoughtfully used the labs laser cutter to make some acrylic display mounts. A couple screws, standoff posts, and acrylic plates later, and lo, we had a lovely, hand built, LED clock!

The class was a great experience for both Zach and I, and we both had something useful we took away together. Each of us has an identical clock that we made at the same time, together, on a cold day in December.

Thanks MakeIt for providing a great learning environment, thanks Bill for putting together a great class, and thanks Zach for spending a cool day geeking out with his old man.

Repairing Drone XT60 Power Connectors

A quicky post here. I took about a year and a half off drone racing, and I’m just getting back into it for a bit. What has happened during that time is that the community has moved onto to faster, smaller drones. At the moment all I have is my 250mm QAV250 clone, so keeping that flying until I build a new machine is what’s keeping me busy.

The damaged XT60

I went out to fly yesterday with some folks in Waltham, but before I could power up, I noticed my XT60 connector had broken loose on the positive lead. Bad news. That’s not something I can fix in the field. No flying for me!.
Tonight I sat down to repair the power connector, but realized I didn’t have any spares. I tried to reuse an old connector, and… well, melted it into goo. (that’s what’s int he alligator clips in the picture below). I had one other one, and managed to desolder and solder in the new connection without too much damage. I am sort of proud of the fact that I was able to reconnect the power leads, and add 3″ of extra silicone insulated feed wire, and get my shrink tubing in place without much chaos.

All fixed and insulated properly.

Tomorrow I should be able to fly with the MultiGP folks up in Derry, but I know my time with the 250 is coming to an end. I have a new frame and motor and battery setup in mind, but more on that when things get closer. For now, things are packed up and ready to go flying tomorrow!

The Arduino Mini 05 is… well, mini!

Arduino Mini 05
Arduino Mini 05

I’m looking to replace the Arduino Uno in the staff with a smaller controller that will fit in the body of the internal tube. The Mini 05 seemed like the best option… well, received it this weekend, and I have to admit, I’m a little daunted.

On the one hand, it sure will fit in the staff, on the other hand, there’s a lot of very small contact points here. My soldering is pretty crude. I’ll have to put in a header for the USB port first, after that I can probably use a socket, which’ll make connections a lot easier.