Board v2

A project log for Yet Another Electronic Lampyridae

and I ain't using a '555. Self-organising CMOS ring oscillators are cooler !

Yann Guidon / YGDESYann Guidon / YGDES 07/08/2016 at 03:050 Comments

I tuned the layout, using the experience from the #Yet Another (Discrete) Clock 10TFF module.

For example, I enlarged the pads of the standard parts to ease soldering. Plated holes help soldering too but the larger pads allow more heat transfer.

I reduced the size to 50×20mm to make it easy to manufacture. You can fit 2×8 boards on a 160×100 (Europe) format, or 2×5 on a 10×10mm format.

I added 2 LEDs because they help check the circuit progressively, during soldering.

The schematic is barely changed :

The layout is much better, though:

Hopefully, it is not too intimidating to beginners.

Another enhancement would be to add a Lithium coin cell footprint, to replace the 2 pads for an external power supply.