PCBs Galore 

That UV light is gonna take its sweet time curing anything at 4W, but it's better than nothing. Your best bet to cut costs is search for LED nail lamps that pump out at least 10x more UV. Thanks to gel polish, you can get one for $10 anywhere random crap is sold. I do some printmaking at home, so I bought a 20W UV flood lamp from Amazon.

That's a very elegant looking board Dave! Looking forward seeing it working.

Cannot wait to see the *CMOS Milli Clock* get built! Praying that your pads for the segment displays are going to be bodge wire free!!! And the *Pride Flag* looks like it's going to be awesome too, of course!

Those boards turned out great! Well done

Take page out of Big Clive's Book he uses a UV nail curer for doing nails.

Love the idea of the flag. Great looking clock - are you confident the pins are the right way round? ;-)

That millisecond board looks awesome, the fit on the 7-sement display was very satisfying!

I’ve used the green Chinese solder resist in the past. I’d print the solder mask pattern on transparency film. Clean the pcb thoroughly. Put a dab of the resist in the board. Put a piece of unprinten transparency film on top. Spread the resist around (underneath the film) with a credit card. Thinner is better (but in your case you actually care about the looks). Place the solder mask pattern on top. Put a piece of glass on top to make it lay flat. I would expose mine with two 1W UV leds for 10 minutes. After that remove the film(s). Scrub away the uncurled paint with acetone and q-tips. You can be relatively hard on it. The only problem I had was that sometimes small corners would lift from the pcb. If you removed all visible paint, go over it again. If there’s even a very thin (invisible) layer of paint left, soldering will be very hard (I learned that the hard way). After that give it another 10-30 minutes under the UV. Or leave it outside in the sun. Hope that helps.

all white boards and a load of felt tips, wouldnt look crap at all, going to try it. i am a genius.

Those displays are nice and I totally feel your fear when having to design your own parts. Glad it all worked out and can't wait to see some rainbow boards and custom soldermask work. And I'm shocked that UV lights are still so expensive with all the resin printer owners buying them these days...then again, that might also be why they are so expensive. I know I have a nice selection of 385-415nm wavelength light sources.

Looks an interesting project ,Big Clive uses a nail polish light for the ultraviolet curing.

That 7 segment mount is genius. It popping in felt like the ending of the Truman show where everyone watching was celebrating when he left! Or at least that's how felt!

We're still bummed about the Boston Pride Parade being cancelled for Covid-19 this year, but your PCB Pride flag is very much appreciated. Happy Pride!! :-)

I recognized that flag but now it got amended I see. Cool idea to make a flag out of PCBs.

The black board is really nice looking. I love the idea of the reverse mount for the surface mount 7-segment displays.

That clock is going to look very good

You should have looked at a form of multiplexing the displays to reduce driver count, or just the one µC and a MAX7219 and your away.

Fun projects coming up.

I was actually crossing my fingers for that to pop in... :)

I was a tube for a water filter thats fitted in ponds, and just run it off a battery powered fluorescent lamp. works great for eproms etc. just have to keep it well away from eyes and skin etc.

12:33 COOL that it fits !

Very nice. Just one small thing....shouldn't 'milliseconds' be 3 decimal places?

Brilliant David!

Cool board ! Im interested to see if your touch switches are ok before I " spin " my PCB's !...cheers!

Hi bro can you make a video using the white uv solder mask please?

Those boards look brilliant. Really the price for the components is not all that expensive. Only compared to the dirt cheap aliexpress stuff they are. All in all thats not more than 15 or 20 quid for the whole assembly. Compared to many other hobbies that’s still almost nothing. That‘ll be at least 3 hours of fun. And a good reason to put out another video about it. Which is another 8 hours of „fun“

I used to see Eagle everywhere about 4 years ago, but due to Eagle policies, and KiCAD getting better, it pretty much seams to have disappeared. I like the look of Eagle better, but switching to KiCAD is the better option now that they fixed it up so much - KiCAD 4 years ago wasn't good -.

Long time user of Eagle, I love it, but recently I have finally needed to do a long differential pair for a USB connector. I've avoided needing to do anything with impedance and length matching but finally took the hit for an ESP32 project. Turns out Eagle does not have any tools for paired traces or any impedance calculations at all. Gutted

Measure twice, order once... I should learn how to do that! Btw... could you tell me the LCSC partnumber? Those extra "mounting" pads looks like they would provide some more strain relieve.

Can't wait to see the touch panel. Also, i think KiCad will count a logo as a component so might solve your problem with the led.

WOW Look forward to your PCB Flag!!!!!!!!!!!!!!!!!!!!

Tube, Not Bulb! Bulbs are planted in the garden! Damn, I heard my old teacher yelling that at me!

LOVE that pride flag idea. Can't wait to see it come together.

the m second clock looks awesome i wanna make one haha

You have a centsiecond clock. A millisecond clock would have three decimal places after the seconds. Sorry 😜 It's good though! I wonder if you coulda fooled kicad by placing that LED in one of the cutouts? That's worth an experiment just to see if it runs the gerbers. Failing that, try putting solder mask back over those pads

Just stating the bleeding obvious, but couldn't you have put all the components on the front of the pcb. Then just turn the pcb's around when you get them. Et voila, the components are now at the back, and no led on the front.

All those lovely pcb colours! 🌈

Nice job be good to see the billed

Pride flag crap badge! I heart this so much.

Your 4.096MHz text is mirrored mate :)

Hey, there! If you're looking for an even smaller footprint for ICSP / other things when programming little boards like the ATTiny, I'm currently using the SOICBite footprint by Simon Merret in my project! hackaday.io/project/165917-soicbite-programmingdebug-connector-footprint

You lost me @LGBT