Post your DIY PCBs in this thread
This one took 40 minutes to expose, develop and etch and 3 hours to drill and solder. It sucks not having a CNC router.
Can you spot the bridges? I bet you can't. There aren't any.
Toner transfer on one layer board. One of my first SMD experiments with different trace widths and isolation. Came out so-so. The smaller pads are for 0805 components and the IC was SSOP iirc. Kept this particular one as a reminder to pay attention to avoiding rookie mistakes: can you spot it?
All made from salvaged parts, including the bit of wire on the regulator.
>It sucks not having a CNC router.
that's why I almost always go veroboard, PROTO777, breadboard, or I have the board made by some ebay company.
I'm more than anything impressed by the lack of CNC mills that have come out of the reprap community.
Are there any decent DIY pcb mills out there that are around $200?
Looks really nice OP
I'm still stuck with toner transfer, which is crap since holes start to appear way before the toner runs out, it must be more than half filled to make a good print, at least if fast and quite simple.
You also have to use thick traces just to be sure.
Pic related, a clock I'm making, with two bridges to connect two pins because I forgot to connect them and four more bridges on the top. (1x 8pin IC and 2x 16 pin IC and a 14 pin display at the top)
Not hand made PCB, but self designed and self soldered.
It is a 4 layer PCB, and the circuit is the power stage of a bidirectional DC/DC converter.
Yes, the display section with an automatic brightness control
- make wider traces so you dont damage the glue bond as much
- find better quality boards which are bonded better
- use lower-wattage iron
- pre-tin the copper using a heat gun and solder paste
I tried all of that but I think the board I was using was just shit. I have never had trouble surface mount soldering before but when I did it on a milled board the traces just lifted immediately even with preheating the board and tinning the traces. I'll only photoetch from now on.
Well I had another go at etching today.
Turned out really well.
Here's the first attempt.
And here's the good one.
I've used the exact same procedure, same amount of time under the UV light, same developer, everything identical up to the point of etching where I opted for a stronger mix which turned out great.
Note the bridges -- I fucked up and used transistor footprints that had the C and E legs the other way around compared to the actual components. Whoops. Soldering that was NOT fun under time pressure.
> made the board layout
> drilled, etched etc everything myself
> placed all the components myself
> finish soldering
> program the chip
> displays nothing
> 30 minutes left to hand in the functioning board
Also I found a video from when my group stripped the mask used for the tin plating process after etching.
thermal resistance and reliability, i made a mistake when forgot to bend the regulator leads for alivite the termal cycling but i expect this project to last at least 30 years.
with some backlight and marks at the laser printed sheets, i is a stapler to fix the borders and insert the PCB in between before using a laminator to transfer the toner.
Sure, Here is a pcb I made. I just didnt have the time to fart around with transparencies and laminates anymore. So I just laid out the components and used a special marker to mark what to keep. Once I was happy with everything. I dunked it in etchent.