Thursday, April 2, 2015

An SMD 4 digit 7 segment diy display

I was designing an electronic clock to see time easier at night. And while at it, I came up with a nice idea:

Having used a lot of perfboards(dot pcb) to prototype my projects, I thought of a way to make a 7 segment display out of smd leds. Making a segment out of 2 common grounded leds..
I stumbled upon it while trying to determine a nice size for my clock. I drew a mask on perfboard with a marker. Later I redrew it and cut it out:

I soldered on all of the 58 smd leds:

And then used a 0.25mm(30AWG) coated wire to make connections:

That gave me a nice bunch of leds:

All of the segments are connected in the usual matrix style. Every segment is a row and every digit is a column. 
The 12 pin header is configured: A, B, C, D, E, F, G, Dots, D1, D2, D3, D4

I forgot to connect the dots ground. It can be connected to whichever digit as another extra segment.