Hi all.. So, I've got a few parts I've added to my own library that I will be using but which were missing from the standard libs.. The latest part I'm trying to add is a Vishay VO14642AABTR which is a surface mount SMD-6 part and the first real one I've not been able to copy from elsewhere. So, all of the tutorials suggest adding the requisite number of SMD pads a particular part needs and then using a calculator & the eagle inspector to place each pad where it needs to be respective to the other pads around it.
So, I used the inspector (the "i" button) to set the pad sizes per the data sheet to 1.52mm x 1.78mm. No problem with that. Each pad center has a spacing of 2.54mm (.1").. The exact distance between pads is .76mm edge to edge and the edge-to-edge gap from one side of the part to the other is 8mm min.
So, I get out the calculator and once I've got one pad at say +2.54 (this would be the right column on the part) on the x-axis then I need to go -10.54 to the left to find the location of the pad on that side of the part (-2.54+-8).. I think that's about right.. Unfortunately Eagle make it hard to verify without changing the grid size.. and I keep forgetting that it likes to measure from the center of the pad with regards to the X/Y position..
It'd be cool to have a calculator that you could punch in the dimensions for each pad and how they're related spacing wise and have it calculate the exact locations within the Eagle grid system so you only have to put them in..
Is this more or less the way that you all do this (by hand)? Any tricks you wish to share? I suspect I'm probably over thinking this..
So, I used the inspector (the "i" button) to set the pad sizes per the data sheet to 1.52mm x 1.78mm. No problem with that. Each pad center has a spacing of 2.54mm (.1").. The exact distance between pads is .76mm edge to edge and the edge-to-edge gap from one side of the part to the other is 8mm min.
So, I get out the calculator and once I've got one pad at say +2.54 (this would be the right column on the part) on the x-axis then I need to go -10.54 to the left to find the location of the pad on that side of the part (-2.54+-8).. I think that's about right.. Unfortunately Eagle make it hard to verify without changing the grid size.. and I keep forgetting that it likes to measure from the center of the pad with regards to the X/Y position..
It'd be cool to have a calculator that you could punch in the dimensions for each pad and how they're related spacing wise and have it calculate the exact locations within the Eagle grid system so you only have to put them in..
Is this more or less the way that you all do this (by hand)? Any tricks you wish to share? I suspect I'm probably over thinking this..