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===== Adafruit Parts =====
  * [[info:BMP280 Breakout]] Adafruit version
  * [[2012:Adafruit DC Boarduino]] Arduino with Atmega 328
  * [[2012:i2c or SPI Backpack]] 2 wire LCD or relay hookup
  * {{ ::overview_-_adafruit_bmp280_barometric_pressure_temperature_sensor_breakout_-_adafruit_learning_system_2017-07-05_9-13-57_am_.htm |Overview Adafruit BMP280 Pressure Sensor breakout}}
  * [[2012:Adafruit DHT22 Humidity-Temp]] Sensor
  * [[info:DHT22 Humidity Sensor]] from Adafruit
  * [[2012:TV B Gone July 2012]]
  * [[2013:Standard LCD 4x20 March 2013]]
  * [[2015:Red Matrix LED 16x24 Dec 2015]]
  * [[info:TH02 Temp-Humidity Sensor]] sold by Anarduino
  * [[2016:Huzzah Esp8266]] Adafruits breakout and packaging
  * {{ ::overview_-_adafruit_huzzah_esp8266_breakout_-_adafruit_learning_system_2016-12-09_10-22-44_am_.htm |Huzzah Overview & Pin definitions}}
  * [[2016:Huzzah Esp8266 Bootloader]] Adafruits Arduino IDE instrutions
  * {{ ::overview_-_adafruit_ds3231_precision_rtc_breakout_-_adafruit_learning_system_2017-03-26_8-35-32_am_.htm |RTC DS3231 Adafruit Learning}}
  * [[info:Adafruit Powertail 2]] purchased Aug 2014
  * [[Adafruit FTDI to USB Cable]]

===== Connectors =====
  * [[Micro USB vs Mini USB]]
===== Misc Data Sheets =====
  * [[info:All Electronics DC-DC notes]]
  * [[info:Adafruit Powertail 2]] purchased Aug 2014
  * [[info:ESP-12 pinout]] esp8266 LoLin and pins to use Arduino IDE, I2C and SPI definitions
  * {{ ::new_nodemcu_lua_esp8266_ch340g_esp-12e_wireless_wifi_internet_development_board_ebay_2019-03-20_8_36_39_am_.html |NodeMCU esp8266 board}}
  * {{ ::esp8266_pinout_diagrams.pdf |ESP8266 boards pinouts}}
  * [[info:NodeMCU pin numbers for Arduino IDE]]
  * [[Pin Mapping Lolin to ESP-12]]
  * [[info:LM317L Adj Volt Reg notes]] also LM340, LM7805
  * [[info:RA4 Relay pinout]]
  * [[info:FDN337 FET pinout]]
  * [[info:SOT-23 LEDs pinout]]
  * [[info:High Current with 78xx]]
  * [[info:Level translation for mixed 5v and 3v]]
  * [[info:LM2937 for 5v to 3v]]
  * [[info:LM7805L 5v regulator]] pinout
  * [[info:Misc One Wire Temp Sensor tables]]
  * [[info:Chinese 8 Relay Board March 2013]]
  * [[info:Chinese 2 Relay Board March 2016]] 
  * [[info:433 Mhz Transceiver]] Cheap Chinese eBay
  * {{:sn74hc595.pdf|74HC595 datasheet}} from Sparkfun 8/6/2016
  * {{ ::uln2003a.pdf |ULN2003 Darlington Relay/motor driver}}
  * [[MP1584 Dip]] DC to DC converter
  * [[DRV8825 Stepper Driver]]
  * {{ ::nodemcu-v3.pdf |Noce MCU V3 datasheet}}

----

===== Data Sheet Notes =====

  * [[info:433 Mhz Transceiver]] Cheap Chinese eBay
  * [[info:All Electronics DC-DC notes]]
  * [[info:Chinese 2 Relay Board March 2016]]  
  * [[info:Chinese 8 Relay Board March 2013]]
  * [[info:Chinese 8 Relay Board August 2016]] 
  * [[info:FDN337 FET pinout]] 
  * [[info:High Current with 78xx]] 
  * [[info:Level translation for mixed 5v and 3v]] 
  * [[info:LM317L Adj Volt Reg notes]] also LM340, LM7805
  * [[info:LM2596 DC-DC Module]] components mounted on PCB pics, Datasheet
  * [[info:LM2937 for 5v to 3v]]
  * [[info:LM7805L 5v regulator]] pinout
  * [[info:Misc One Wire Temp Sensor tables]]  
  * [[info:RA4 Relay pinout]]
  * {{ ::arduino_-_shiftout_2016-09-04_10-05-15_am_.htm |Serial to Parallel HC595 notes}}
  * [[info:SOT-23 LEDs pinout]]
  * [[LinkNode R4 Relay board]]
  * [[Voltage Regulator Weewooday DC-DC]] 4.5-24V Buck Converter with fixed or variable output

===== Ebay parts =====
  * [[info:BMP280 Barometer]] used in Davis to WiFi gateway Nov 2019
  * [[info:FT3231 RTC]]
  * {{ ::linknode_r4_arduino-compatible_wifi_relay_controller_-_linksprite_2019-06-12_8_51_24_am_.html |}}

===== Steppers =====
  * {{ ::stepper_specification_sheet.pdf |Stepper Data Sheet}} 28BYJ48
  * {{ ::stepper_user_guide.pdf |ULN2003 Data Sheet}}
  * [[NEMA Motor sizes]]
  * {{ ::28byj-48_stepper_motor_pinout_wiring_specifications_uses_guide_datasheet.pdf |28byj-48 stepper motor}}