I admit it: I'm a total geek. I love electronics, programming, 3D art, vintage Apple hardware, and whisky. I'm always juggling half a dozen projects. I also enjoy documenting it all: my successes, my failures, my experiences... and everything geeky along the way.

Seeed Studio Fusion - $9.90 for 10pcs 2 layer 10x10cm boards


 
 
 
 
 

Large 7-Segment Clock, Part II | Kevin Rye.net - Main

Kevin Rye

Geek Extraordinaire. Yeh, I said it.

Large 7-Segment Clock, Part II

After a 13-day wait, I had my 7-segment LED breakout boards in-hand.

7segbreakout_assembly_0005

They came out perfect.

7segbreakout_assembly_0007

Since I'm not multiplexing the AM/PM LED in code, I need to make sure that only the first digit on the right has the decimal point soldered. I suppose I could cut the trace on the other digit, but it's easier (and cleaner) to just bend the one pin out of the way.

7segbreakout_assembly_0006

Always make sure you remember to cover your LEDs with something before you solder them. I like to use a small sticky pad. Flipping them over to solder the pins on the back is a good way to scuff them up. Trust me, I've done it.

7segbreakout_assembly_0008

It was a very easy build since all the resistors will be on the mainboard. It only took about a minute to solder one of the boards together.

7segbreakout_assembly_0009

I popped it back into my breadboard and reran the wires. It works great, and only the one decimal point is illuminated. Success!

7segbreakout_assembly_0017

I then put the other two together. For the minutes and seconds sections, I went ahead and soldered in the decimal pins since they will not be physically routed on the main controller board.

7segbreakout_assembly_0020

The colon PCBs were trailing behind by a few days, so I had to wait for them to show up. I can't put the wraps on the 3D-printed frame without them. I was very happy to see them when they arrived.

colonPCBassembly_0071

Assembly was a snap. It only took a few minutes to put two of them together. I'm using 470 ohm resistors across the board. It doesn't look like it in the picture, but I think the brightness is comparable.

colonPCBassembly_0081

I just have to wait a few more days for the controller board and I can wrap this one up. In the meantime, it's time to get to work on the 3D-printed frame…

See this project from start to finish:
Large 7-Segment Clock, Part I
Large 7-Segment Clock, Part II
Large 7-Segment Clock, Part III
Large 7-Segment Clock, Part IV