I am nearing the stage after testing everything on a breadboard where I'm ready to fire up Eagle CAD and start developing my circuit board. This will be my first ever circuit board design. My question now is: Should I design for through-hole or just go straight to surface-mount?
I have a pretty good soldering station (Weller WSM-1), so I think if I use reasonably large SMD components I should be able to hand-solder things with no problem. On the other hand, with through-hole components it would be impossible to not be able to solder them. The board is very basic, with just one ATtiny85, three resistors, a bunch of LEDs, two ceramic capacitors and a 32.768 kHz crystal. The crystal is another point I'm unsure of: Every electronic device I've opened up has these as hand-soldered through-hole, even if the rest of the board is all surface-mount. Why is that? Are 32.768 kHz crystals not available in surface-mount packages?
I would really appreciate any input on helping select the best way to go on the board design (through-hole vs surface-mount). I'm thinking that in the unlikely even that my board becomes popular, having it as an SMD board would facilitate production at a plant that can do automated assembly. On the other hand, I have no idea if through-hole manufacturing would be a cheaper option for certain quantities.