Shane Justice <[email protected]> writes: > I am working up ABS Avbays for my rockets and want to put in mounting > bosses for your boards. I have been trying to mic-out the holes and > hole spacing, but I'm not getting very good repeatability with my > micrometer- I think the hole drill size on the Telemetrum V1.2 is > something like 0.1165 inches_ does this sound right? Hole center from > the edge of the board seems to be 0.125 inches in, on the short > dimension of the board. Vertically, the holes nearest the antenna-end > of the board are also 0.125 inches down from the top of the board. The > hole centers by the screw terminal connector at the bottom of the > board appear to be about 0.4 inches up from the bottom of the > board. Does this match your design notes? > > Any chance you have this documented for your other boards? I'm > thinking of building integrated AvBays for a wide range of body tubes > and designing them to house your boards. Any assistance is greatly > appreciated!
We now have drill templates as an appendix in the manual, or you can find just the templates at http://altusmetrum.org/Documents/ . Keith and I have already talked about adding explicit dimension information to a future version of the templates. For now, for your easy reference, all TeleMetrum versions we've ever sold have the hole positions (referenced to one aft corner of the board) as: 375.00mil 125.00mil 375.00mil 875.00mil 2625.00mil 125.00mil 2625.00mil 875.00mil For TeleMega, the hole positions are: 125.00mil 125.00mil 125.00mil 1125.00mil 3125.00mil 125.00mil 3125.00mil 1125.00mil For EasyMini, the hole positions are: 1375.00mil 675.00mil 1375.00mil 125.00mil 125.00mil 675.00mil 125.00mil 125.00mil For each of these 3 products, the holes are sized for use with 4-40 or M3 screws. And of course 'mil' means thousandth of an inch. My apologies to our international friends, but PCB design tools and processes in the US still mostly work in mils, even though most of the parts we use are now specified in "real" units. ;-) And if you come up with some cool AvBay designs, please share! I've had a couple requests to add some design info and photos of actual bays to the altusmetrum.org site... if you or anyone else want to write up what you're doing in this regard, I'll be happy to make space for it and publish with appropriate credit! Enjoy! Bdale
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