.. do the smd parts (e.g. c2 r2) below the IC socket fit without touching the plastic socket's diagonal frame? P.
The SMD parts do look a bit too close on that.
There will be no diagonal frame, just socket strips. I'll see if the parts can be moved in a little.
.. so you are not going to use the standard dil40 machine (precision) socket?
No, being in the US, I was thinking more like this, comparable design, less expensive.
http://www.dipmicro.com/store/index.php?act=viewProd&productCode=HDR40X1FM
Course if one had a bare board one could populate as desired. Take a frame and cut the middle span for example.
I like the look of these, just gets kind of pricey to use 40 - becomes a $6 socket!
http://www.dipmicro.com/store/0552-2-15-01-11-27-10-0
Pito,
I think you recommende a cap on the 32K crystal - any value recommened there?
Crap. Just discovered that the 20mm battery holder (CR2032) I used from the Sparkfun library is not actually carried by Sparkfun.
Anyone seen either of these in the Eagle Library?
http://www.dipmicro.com/store/BH120591-1
http://www.dipmicro.com/store/BH2025
Thanks
Robert
Those machined headers will probably do fine for the chip although I have never seen them used that way before
EDIT: Just tested on one, seems to work quite well actually.
Crap. Just discovered that the 20mm battery holder (CR2032) I used from the Sparkfun library is not actually carried by Sparkfun.
Anyone seen either of these in the Eagle Library?
Plastic Battery Holder 1-cell ø20mm PC 120591-1 - dipmicro electronics
Coin Battery Holder ø 20mm (CR2025, CR2032) Top Load - dipmicro electronics
Sounds like a job for EAGLE part making
I'll take a look through the libraries I have later and see if anything matches up but it would almost be faster to make a part.
Well, faster for someone more experienced than me! I kind of bumble along, having only done 1 so far. Learned a lot about eagle doing it, but by no means was it a speedy process.
I use the machine header strips all the time. A large # of what I have built so far has used those as a socket for a Promini's, with pins installed in the promini. Dipmicro has the too.
here's one I prepared earlier
if you want any mods just let me know
but it does seem to match the data sheet I found (TYCO 120591-1)
LINK REMOVED AS THE LIBRARY WAS INCORRECT
see post #203 for library Mk II
added link to data sheet
MMCP42, what's the part number for that? I was just about to place an order from Digikey and I can grab one of those for Crossroads to play with.
Well it's two pads either 20 or 26.92mm apart for the ones CrossRoads posted... I wouldn't bother with an actual part atm
skyjumper:
MMCP42, what's the part number for that? I was just about to place an order from Digikey and I can grab one of those for Crossroads to play with.
it's the tyco 120591-1
Thanks! $2.19 each at Digikey in small quantity, in stock.
Thanks guys! Will update my layout tonight. Think I just have 1 or 2 parts left to confirm as being purchasable & I will be ordering material & PCBs.
Figure out solder strategy & template, etc next.
Well, it was an ugly routing to fit those pins, but I got it in!
Looks to me that the 2 top pins are the +/- from the battery and the bottom pin is not connected; the symbol is not marked like that.
Which is that correct? Hopefully the electrical connections as that's what I worked in 8)
Yeah, only a single pin for +, the diagrams are confusing where they show two pins as is splits into two to contact the battery.
Can you fix the footprint to match? I had to show both ends of the battery connected to the RTC's Vbat pin on the schematic to get eagle to let me connect them together, and kludge a via and overlapping wires over the other pin to get it grounded.
Thanks!
Robert