CHANGELOG.md

Changelog

Unreleased Changes

• None

v2.0.0

• Updated to KiCAD 7
• Reduced size of holes for PSU pins from 1.2mm to 1.02mm

v1.0.0

• Updated to KiCAD 6
• Backported changes from Neotron Pico
  • Split microphone audio / bias
  • DNF components now not shown on iBOM
  • External LED drive is 5V 20mA
  • Two PSU control BJTs are now surface mount
  • Use 200mA Holtek HT7533-1 stand-by regulator
  • Added internal 12V input header
  • K7805-3AR3 control pin is protected with a zener (allows higher input voltages)
  • HDD LED is driven from I/O mux, not BMC
  • Replaced 12 MHz Crystal with JLCPCB basic part
  • Replaced SD Card with Amphenol part
  • Replaced decoupling with single 10uF
  • Added PC speaker output
  • Changed K7805-3AR3 to have ceramic output cap
  • Increased VGA DAC current
  • Replace 74HC245 with 74HC138, plus five LEDS for the now spare pins
  • Adds 6mm switches for power and reset
  • Added internal 5V/3.3V output header
  • Reverse polarity protection on the input

v0.12.0

• Add a second TPF133A but with RGB pins swapped (the channels are identical).

v0.11.0

• Added Expansion Edge connector for making expansion cards.

v0.10.0

• SYS_RESET is pulled down.
• 5V PSU's Ctrl input is now controlled with PNP/NPN transistor pair.
• Added extra explanatory text to BMC page
• Added not on audio sheet about split grounds.

v0.9.3

• Remove audio split ground by joining GND and GNDA

v0.9.2

• Change Audio LR and BCLK pins to be bi-directional
• Also renamed all Audio pins for clarity

v0.9.1

• Swapped BUTTON_PWR and SYS_RESET to avoid DRC issue
• Split PSU and BMC into two separate sheets
• Swapped some pins on the STM32 to make it compatible with more alternatives

v0.9.0

• Changed STM32 pinout to add 4-wire UART and move to SPI bus
• Added some Mouser part numbers
• Marked resistors as 1% where not specified

v0.8.0

• Updated some 5V0 caps from 10V to 16V
• README updates

v0.7.0

• Replaced STM32F0 TSSOP with LQFP-32
  • Has 0.8mm pitch (instead of 0.65mm) so should be easier to solder
• Replaced most of the big electrolytics with 0805 MLCC
  • Takes up less board space

v0.6.0

• Added 3D model for USB header
• Changed main input Inductor to horizontal footprint
• Created footprint for Mornsun DC/DC PSU
• Added header for case power LED
• Changed BMC debug header to standard part

v0.5.0

• Swap BMC from NXP KE04Z to ST STM32F0

v0.4.0

• Added missing part numbers.

v0.3.1

• Fix ERC error when SPI CIPO pins joined together.

v0.3.0

• Added R2R DAC

v0.2.0

• Added RTC sheet

v0.1.0

First WIP draft release.

• Sub-modules added
• Connector fit in ATX IO area tested
• Audio Codec Sheet
• SD Card Sheet
• Ethernet Sheet
• Video Sheet
• Serial Sheet
• CPU Socket defined
• Expansion Socket defined