ColdPlunge_Changelog_v1p33.txt
Cold Plunge v1.33 Change Log:

Main board:
     DNP'd AC zero cross circuit since it wa scausing an issue that prevented STM32 from being updated by OTA
UI board:
     None



Cold Plunge v1.32 Change Log:

Main board:
     Rerouted TX and RX pins to also go to PA9/PA10 to fix DFU/bootloader mode
     	      (did not remove older connections to PC4/PC5)
     Removed Fake zero cross resistor R83 so that it couldn't be inadvertenly placed
     Removed debug button capacitor C30 so that it couldn't be inadvertently placed
     
     Updated revision in silkscreen to 1.32
     Widened all 0.18mm tracks to 0.25mm
     Added pin labeling on top-side for programming header
     Cleaned up 3D model and used more reperesentative parts for 5V buck converter
     Added back G5RL-1A-E-TV8 DC24;G2RL-1A-E-ASI-DC24 as alternates for SPARE and OZONE relays
     	   since this revision will not be UL listed
     Updated Fab Notes to include Jim's comments:
     	     1. Spec'd two different min trace & space
	     2. Call out cleaning PCBA per IPC-610
	     3. Add note minimum 75% barrel fill on thru-hole leads
	     4. Added soldermask color
	     5. Specify TG155 type FR4

UI board:
     None
     


Cold Plunge v1.31 Change Log:

Main board:
     Added double footprint for D11 to accomodate DF10S or MB10S options

UI board:
     None
     


Cold Plunge v1.3 Change Log:

Main Board:
     Widen AC power tracks further, enforce 3mm AC spacing aside from Ozone connector
     Fix compressor current measurement by removing diode, capacitor, and output RC network
     Fix Fan, pump and LED driver stage by lowering pullup resistor
     Add 3rd thermistor input with DNP connector and place NTC (2 external thermistor and 1 on-board chip NTC)
     Remove unused DNPs and delete 2x 0-ohm resistors around relay driver IC1
     Remove RS485 transciever
     Change D11 to DF10S UL-Rated alternative
     Flipped TP1 and TP2 to bottom side
     Remapped pins to place IO's on better CPU peripherals
     	      All ADCs on a single ADC1 with their own channel
	      All PWMs and input timers on their own timer instead of different channels of same timer
	      Button interrupt no longer shared with zero cross interrupt
     Fixed schematic error where I'd mislabeled Ozone as spare and compressor as heater & vice versa
     Added debug header for I2C bus

UI Board: None





Cold Plunge v1.2 Change Log:

Main Board: None

UI :  Seg2/Sel2 on D45




Cold Plunge v1.1 Change log:

Main Board:
     Updated board outline to larger dimensions
     Widen AC power tracks
     Add high-current relay for Heater output
     Add pump current measurement
     Add compressor current measurement
     Switch to single connector for pump
     Fix 10k pullup issue on fan tachometer
     Update zero cross AC load resistors to 5.1k each
     Depopulate RS485 transciever, connect resistors for serial UART
     Substitute localized components where possible
     New connectors with larger spacing
     
UI Board:
     Updated board outline to smaller dimensions
     Place second LED for both temperature display settings
     Place 3rd and 4th LEDs for both heating/cooling display settings
     Depopulate RS485 transciever, connect resistors for serial UART
     Substitute localized components where possible

V1.1 Bringup Notes:

     Found an issue with compressor current sense on Main board
     - Rework plan was written up to allow Ambhor to fix this on V1.1 HW
     - Decided not to implement rework/update on this hardware to help Ambhor stay on top of it
     - Plan to detect ice-over via refrigerant temp as opposed to compressor current
     Found an issue with PWM output drivers on Main board (fan, led, pump)
     - Rework is to R24,21,28,72 from 100k to 5.1k
     Found an issue with Seg2/Sel2 on D45
     - Rework plan was written up to allow Ambhor to fix this on V1.1 HW




Cold Plunge v1.0 Initial release:

V1.0 Bringup Notes:
     Issue with fan tach on main board
     Ambhor said AC power tracks were too skinny on main board
     Zero-cross circuit generated too much heat with 2k load resistors