Assembly variant: Part Value Device Package Description BATT1 AAA-HOLDER AAA-HOLDER AAA-HOLDER BATT2 AAA-HOLDER AAA-HOLDER AAA-HOLDER C1 22pF C-EUC0805 C0805 CAPACITOR, European symbol C2 22pF C-EUC0805 C0805 CAPACITOR, European symbol C3 0.1uF C-EUC0805 C0805 CAPACITOR, European symbol C5 0.1uF C-EUC0805 C0805 CAPACITOR, European symbol C6 0.1uF C-EUC0805 C0805 CAPACITOR, European symbol C7 0.1uF C-EUC0805 C0805 CAPACITOR, European symbol C8 0.1uF C-EUC0805 C0805 CAPACITOR, European symbol C9 50uF CPOL-EUSMCC SMC_C POLARIZED CAPACITOR, European symbol C10 0.1uF C-EUC0805 C0805 CAPACITOR, European symbol IC1 MCP9700 MCP9700 SOT23 IC2 AT25DF512C-SSHN-B SO-08 Serial EEPROM 4K/ 8K , SPI bus IC3 ATSHA204A ATSHA204A SOT23 J1 ICSP M03X2NO_SILK 2X3-NS 2x3 .1" header. J3 I2C TWIG-4P-2.0 TWIG-4P-2.0 J4 Digital TWIG-4P-2.0 TWIG-4P-2.0 J5 Analog TWIG-4P-2.0 TWIG-4P-2.0 LED LEDCHIPLED_0805 CHIPLED_0805 LED (RED) PROG J2 FE05-1 FE05-1 ---!!! Do not solder !!! --- Q1 16MHz CRYSTALCTS406 CTS406 CRYSTAL R1 10k R-EU_R0805 R0805 RESISTOR, European symbol R4 330 R-EU_R0805 R0805 RESISTOR, European symbol R5 10k R-EU_R0805 R0805 RESISTOR, European symbol R6 10k R-EU_R0805 R0805 RESISTOR, European symbol RF1 nRF24L01+ NRF24L01 2X4-2.54MM S1 SWITCH-MOMENTARY-2SIDE_EZ SWITCH-MOMENTARY-2SIDE_EZ TACTILE-PTH-SIDEEZ Momentary Switch (short pusher) U1 ATMEGA328PV-20AU ATMEGA328_SMT TQFP32-08 32-Pin Atmega328 part