Add proper WWAN reset circuit using a MMBT2222A NP...
by
Eric Kuzmenko
7 years 2 months
Add proper WWAN reset circuit using a MMBT2222A NPN BJT along with a 100nF cap and a TVS diode, make needed adjustements to the WWAN's SIM card circuit (UIM-CLK and UIM-RESET caps are NC & added 4.7k series resistor to SIM_DETECT_O#), assign the MMBT2222A footprint to KiCad's official SOT-23 footprint (identical to the spec sheet's recommended land pattern)
If necessary, the NC cap pads on UIM-CLK and UIM-RESET can be tested with various values during the first prototype debugging phase.
Add mounting holes to the schematic and assign the...
by
Eric Kuzmenko
7 years 2 months
Add mounting holes to the schematic and assign the associated M2 hole footprint, add fiducial marks to schematic and assign the associated 1mm diameter copper with 2mm diameter solder mask opening footprint, make various visual adjustments throughout the schematic
For better BoM generation, added placeholders for ...
by
Christian Schilmoeller
7 years 2 months
For better BoM generation, added placeholders for SOM, disṕlay, camera, WWAN card and wifi/BT card.
Datasheet links and supplier information can be stored in these new library symbols.
Add FDV301N footprint based on the manufacturer's ...
by
Eric Kuzmenko
7 years 2 months
Add FDV301N footprint based on the manufacturer's given recommended land pattern, use lower ESR 220uF tantalum capacitors in place of previously selected ones, re-export the BoM
Double checked FET footprints to make sure those assigned to the official SOT-23 footprint are correct.
Add AC coupling caps to the HDMI_AUXP/N diff pair ...
by
Eric Kuzmenko
7 years 3 months
Add AC coupling caps to the HDMI_AUXP/N diff pair which were mistakenly left out, fix a couple typos/errors that were made when transitioning to the new top-leve sheet, make the M.2s' I2C RX TX hierarchical signals consistent and clearer
Hopefully all lingering errors have been caught, this will likely be the schematic commit that gets reviewed (fingers crossed).