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.


 
 
 
 
 

Upgrading My Old 7490 Clock, Part V | Kevin Rye.net - Main

Kevin Rye

Geek Extraordinaire. Yeh, I said it.

Upgrading My Old 7490 Clock, Part V

Finally! After 2 weeks of patiently waiting, my new PCBs arrived. I was so eager to put them together.

BBA3_7490_RTC_0002

It was a pretty easy build. I popped the shield onto one of my Bare Bones PCBs and it was up and running in no time.

BBA3_7490_RTC_0009

I then soldered the connections to the seconds, minutes, and hours sections...

BBA3_7490_RTC_0011

...followed by the set buttons and power. It works!

BBA3_7490_RTC_0014

I then dropped the clock into the new enclosure and secured it with some hot glue. Before I peeled of the protective film, I wanted to burn it in for a day just to make sure that there were no kinks. If I had to open it back up and remove the guts, I didn’t want to risk scratching the acrylic. The plan was to take the film off when it was totally done.

BBA3_7490_RTC_0024

After I was happy with the performance, I grabbed some rubber feet out of one of my parts cabinets.

7490rubberfeet_0001

I then stuck the feet on, about 1/4” from each corner.

7490finalassembly_enclosure_0003

I then flipped it back over and peeled off the remaining protective film.

7490finalassembly_enclosure_0006

I think it came out amazing. I just can’t believe after all these years that this clock finally looks like something I can be proud to display. I’m really happy with the results.

See this project from start to finish:
Digital Clock 1.0
Upgrading My Old 7490 Clock, Part I
Upgrading My Old 7490 Clock, Part II
Upgrading My Old 7490 Clock, Part III
Upgrading My Old 7490 Clock, Part IV
Upgrading My Old 7490 Clock, Part V