• Updated Neotron Common Hardware (the library of symbols and footprints we use) to v2.0.0
• Updated to KiCAD 7.0.11
• Replaced MCP23S17 DIP with SOIC (#176)
• Fixed DAC output resistor (#177)

Note: This release has not yet been physically built and assembled and so may contain bugs we haven't found yet.

• Split microphone audio / bias (#132)
• Added more GND vias near power vias
• Minor adjustments to schematic labels
• DNF components now not shown on iBOM
• J901 is a header not a socket
• External LED drive is 5V 20mA
• Moved passives clear away from expansion slot legs
• Updated STEP model
• Added new top-down view to README.
• Set BMC part as being STM32F030K6T6 (F031 is unavailable)
• Specify THS7316 as default video buffer (TPF133A and DIO2663 should also work)
• Stitching vias for ground planes, and wider traces between vias and pads

NB: We wrote some assembly instructions after v1.1 was tagged, which you can find here: https://github.com/Neotron-Compute/Neotron-Pico/blob/develop/ASSEMBLY.md

Known Issues

• RGB DAC output voltage is wrong
  • causes dim video picture (400mV max instead of 700mV max)
  • replace R510 R610 and R710 with 585 ohm, or turn the brightness up on your monitor

What's Changed

• Change JLCPCB part number for DAC pull-down (R510 and friends). by @thejpster in #39
• Fix pinout for BMC in README. by @thejpster in #44
• Reworked DC-DC power-on circuit. by @thejpster in #45
• Switch to KiCAD 6 by @thejpster in #67
• Update pipeline by @thejpster in #68
• Go back to how we did actions before. by @thejpster in #69
• Tie CS pin low on CODEC. by @thejpster in #75
• Switch to the 74hc138 by @thejpster in #76
• Power supply updates. by @thejpster in #78
• Remove and ignore the fp-info-cache file. by @thejpster in #79
• Feature/replace rtc by @thejpster in #80
• PCB updates by @thejpster in #85
• Swap to an Adam Tech battery holder. by @thejpster in #86
• LED and Switch updates. by @thejpster in #88
• Change layer stackup by @thejpster in #91
• Flip the debug LEDs over. by @thejpster in #95
• Remove duplicate part nos by @thejpster in #97
• Reworked audio circuit. by @thejpster in #98
• Added a PC Speaker output. by @thejpster in #100
• Draft: Re-work PCB layout by @thejpster in #102
• Replace SD card by @thejpster in #106
• Change 12M audio crystal. by @thejpster in #107
• Center tracks under sockets by @thejpster in #113
• Final 1.0 cleanups by @thejpster in #114
• Move battery by @thejpster in #116

Full Changelog: v0.5.2...v1.0.0

Contributors

What's Changed

• Change JLCPCB part number for DAC pull-down (R510 and friends). by @thejpster in #39
• Fix pinout for BMC in README. by @thejpster in #44
• Reworked DC-DC power-on circuit. by @thejpster in #45
• Switch to KiCAD 6 by @thejpster in #67
• Update pipeline by @thejpster in #68
• Go back to how we did actions before. by @thejpster in #69
• Tie CS pin low on CODEC. by @thejpster in #75
• Switch to the 74hc138 by @thejpster in #76
• Power supply updates. by @thejpster in #78
• Remove and ignore the fp-info-cache file. by @thejpster in #79
• Feature/replace rtc by @thejpster in #80
• PCB updates by @thejpster in #85
• Swap to an Adam Tech battery holder. by @thejpster in #86
• LED and Switch updates. by @thejpster in #88
• Change layer stackup by @thejpster in #91
• Flip the debug LEDs over. by @thejpster in #95
• Remove duplicate part nos by @thejpster in #97
• Reworked audio circuit. by @thejpster in #98
• Added a PC Speaker output. by @thejpster in #100
• Draft: Re-work PCB layout by @thejpster in #102
• Replace SD card by @thejpster in #106
• Change 12M audio crystal. by @thejpster in #107

Full Changelog: v0.5.2...v1.0.0-rc0

Contributors

Changes over 0.5.1

• Tweaks to the BOM outputs, including an HTML format BOM
• Revised voltages for each capacitor, specifying the minimum acceptable
  • Most parts still specify a component that is better than the minimum, because of availability or price.

Known Issues

• #70 DIR pin on 74HC245 is pulled wrong way !!
• #43 Dead short through Q802 when Q801 enabled !!
• #58 SPI Chip-select pins need pull-ups !

Changes over 0.5.0.

• Moved BOOT0 silkscreen
• Moved labels for BMC SWD and UART ports
• Moved some vias near the BMC to improve the ground pour
• Added version numbers to the release outputs
• Added PNG, SVG and STEP release outputs

Tag has -try1 in the name because my first attempt didn't trigger a GHA for some reason.

Known Issues

• #43 Dead short through Q802 when Q801 enabled !!
• #58 SPI Chip-select pins need pull-ups !
• • #70 DIR pin on 74HC245 is pulled wrong way !!

• Replaced SIP resistor array for PS/2 ports with four SMD resistors
• Sent to JLCPCB to assembly.

Known Issues

• #27 Part nos for C901,C902 are wrong
• #38 Pull-down resistor on VGA DAC is wrong
• #43 Dead short through Q802 when Q801 enabled !!
• #58 SPI Chip-select pins need pull-ups !
• #70 DIR pin on 74HC245 is pulled wrong way !!