[IMP] hardware: V 1.2
* Power PAM8406 PVDDR and add bypass caps
* Rework layout for PAM8406 and its passives
* Connect floating VIAs to ground
by
t3ddftw
3 years 8 months
[IMP] hardware: V 1.1
* Reroute 3.3v rail under the PIC24 to prevent ground returns on the second layer from having to take a longer route
* Bring 5v rail to top layer for a short run in order to open the ground return path (to the left of the PIC24)
* Leave pin 3 of the SPKR_OUT connector floating to prevent audio channel grounding on certain models
* Add space between the edge of the analog audio ground plane end and the R/L channel traces
* VIA stitch layers around the ground "bridge" (right above the BlueBus name on the Silkscreen)
* Increase GND bridge to 1mm from 0.75mm
* Increase BC127 pad size to allow more paste to fill the castellations
* Bring RC filter for BC127 closer to power pin
by
t3ddftw
3 years 11 months
[IMP] hardware: Production V1
* Fix issue with silkscreen names
* Add ground VIA
by
t3ddftw
4 years 4 months
[IMP] hardware: Production V1
* Add Fiducials
* Fix bugs with PCM5122 DGND being floating and VCOM not being tied to AGND
* Adjust routing so that all traces intersect at 90 degree angles on different layers
* Adjust traces to not follow the same track on different sides of the board
* Add additional ground stiches
* Improve placement of decoupling caps for superior ground returns
by
t3ddftw
4 years 5 months
[IMP] hardware: Update Varistor wiring
* Improve Schematic drawing for circuit protection
by
t3ddftw
4 years 5 months
[IMP] hardware: Revision D.1
* Remove errant layers
by
t3ddftw
4 years 6 months
[IMP] hardware: Rev D.2
* Remove debug pads
* Reroute Audio pairs from DAC
* Additional Ground VIAs
by
t3ddftw
4 years 6 months
[IMP] hardware: Rev D
* Remove TL064A
* Remove associated passives
* Remove PCM5102 and add PCM5122 in I2C Mode
* Change output filter on PCM5122 for a higher load
* Re-layout the telephone IO components
* Move Logo
* Rev to D
* Add decently sized and plated mounting holes
by
t3ddftw
4 years 6 months
[IMP] hardware: Add Drill Legend & Connect DTR
* Add Drill Legend and Drawing info for PCB manufacture
* Connect DTR pin on FT232RL to PIC24 for terminal detection
* Condense Parts list
by
t3ddftw
4 years 7 months
[IMP] hardware: Rev C Updates
* Ground Shields for USB and S/PDIF
* Wire S/PDIF directly to WM8804 output
* Replace Microphone resistor with 2kohm
* Replace output load impedance resistors on Audio with 110ohm
by
t3ddftw
4 years 7 months