minDUINO v1.6 Sneak-Peek

I’m getting ahead of myself here but I thought I’d post a quick preview of the minDUINO v1.6 board. The main target here was to accommodate a 28-pin ZIF socket for programming purposes. The 3M ZIF Sockets have a rather larger footprint than a standard IC Socket and therefore, a major redesign was in order to fit it in.

minDUINO v1.6 with ZIF Socket

minDUINO v1.6 with ZIF Socket

In the above Eagle preview, I have added my own custom 28-pin ZIF outline to facilitate arranging the other components around it. I wanted to centralise the ZIF socket rather than have part of it over-hanging the board’s outer edge. Another modification was to enlarge the pads and holes because the ZIF sockets pins are larger than a standard ICs.

As you can see, I have moved most of the supporting components to some degree. The ICSP and Breakout headers are now close to the right-hand edge of the board. I also combined a HC49 type outline with a resonator part since they share similar pitch. You can use either on the board. If a resonator is used, C1 and C2 can be omitted since resonators have the capacitors built in.

The only real compromise I had to make was to delete the bottom right-hand mounting hole. There just isn’t enough room for it. Since these are primarily meant for occasional programming or experimenting, I was content to leave it off. It is a simple thing to put a rubber foot under that corner of the board if necessary.

Once the minDUINO v1.5 boards have arrived and been proven, I’ll order some v1.6 boards and post the design files accordingly.

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