# Hologram Dash - Cellular MCU **URL:** \ **Category:** parts submit\ **Created:** [November 16, 2016, 12:40am UTC](https://forum.fritzing.org/t/hologram-dash-cellular-mcu/2437 "2016-11-16T00:40:41Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Old\_Grey](https://forum.fritzing.org/user_avatar/forum.fritzing.org/old_grey/32/973_2.png) [@Old\_Grey](https://forum.fritzing.org/u/Old_Grey)\ **Post date:** [November 16, 2016, 3:38am UTC](https://forum.fritzing.org/t/hologram-dash-cellular-mcu/2437/2 "2016-11-16T03:38:42Z")
The pins aren’t assigned properly in PCB view. You have circles in copper layer that aren’t assigned, or should be in silkscreen if they aren’t contacts. Assuming that it uses headers to fit on a PCB, there is no top copper layer so it won’t work on 2 layer boards. At 11:00 on this video > [@Part Creation - A very rough how-to](http://forum.fritzing.org/t/part-creation-a-very-rough-how-to/2254): > > You would need a whole series of videos, but this is a quick one to show some tips. This is not a proper guide, just methods to do stuff. karlalhdz and vanepp motivated me to finally work out a screen recorder and put something together. Do you have a datasheet, because the pins aren’t on a 100mil spacing. Something weird with the silkscreen in Gerber export. Export to Gerber and view each layer one at a time on Gerbv [http://gerbv.sourceforge.net](http://gerbv.sourceforge.net) When you assign pins in SCH view use the N,S,E,W selection after you select the graphic. You want connects to connect on pin ends not the middle. Other than that, that’s a pretty sweet BB drawing. --- _[View the full topic](https://forum.fritzing.org/t/hologram-dash-cellular-mcu/2437)._