BOM - bill of materials (trough-hole version)

Part	Value	Package	Description
R1	2.2kΩ	0207/7	resistor
R2,3,4,5	10kΩ	0207/7	resistor
LDR1	PGM5537	0604/4	light dependent resistor
C1,2,3	100nF	C050-025X075	capacitor
C4,5	22pF	C2.5-2	capacitor
L1	10µH	0207/7	inductor
D1	1N5819	DO41-7.6	resistor
LED1	3mm green	3mm	LED
X1	32.768kHz	TC38H	RTC clock crystal
X2	16MHz	QS	CPU clock crystal
IC1	DS1307+	DIL08	I2C-Bus CLOCK/CALENDAR
IC2	ATmega328p	DIL28	ATmega328p µ-controller
IC1b	8-pin	DIL08	IC socket
IC2b	28-pin	DIL28	IC socket
BAT1	CR1220	CR1220	through-hole battery holder (CR1220)
BAT1b	CR1220-3V	CR1220	3 volt lithium battery
CON1	3-pin	SIL03	pin header to connect the µ-controller and LED board
CON2	vertical µUSB	µUSB-V-B	vertical micro USB connector (type B) with power pins only
CON3	2x3 pin-header	2x3	ICSP, AVR ISP-6 Serial Programming Header (optional)
CON4	5-pin	SIL05	pin header to connect the analogue slider board (optional)
CON5	2-pin	SIL02	pin header to connect the snooze button
CON6	2-pin	SIL02	pin header to connect RX and TX for the serial communication
CON6b	1-pin	SIL01	pin header to connect the GND for the serial communication
S1	momentary	6x6x6mm	momentary tact push button, button shaft length 6mm
S2,3	momentary	6x6x16mm	momentary tact push button, button shaft length 16mm
S2b,3b	cap	6x6	tact push button caps (white)

Part	Value	Package	Description
R1	4.7kΩ	0207/7	resistor
C1-12	100nF	C050-025X075	capacitor
C13	10µF/16V	E2-5	polarized capacitor (radial)
LED1-12	WS2812b	5050	intelligent RGB LED's
CON1,2	3-pin	SIL03	pin headers to connect the µ-controller and LED board

BOM - bill of materials (SMD version)

Part	Value	Package	Description
R1	2.2kΩ	1206	resistor
R2,3,4,5	10kΩ	1206	resistor
R6	4.7kΩ	1206	resistor
LDR1	PGM5537	0604/4	light dependent resistor
C1,15	100nF	1206	capacitor
C16,17	22pF	1206	capacitor
C18	10µF/16V	B 4.0/5.4	polarized capacitor (radial)
L1	10µH	1206	inductor
D1	1N5819	SMA-DO214AC	resistor
LED1-12	WS2812b	5050	intelligent RGB LED's
LED13	3mm green	1206	LED
X1	32.768kHz	TC38H	RTC clock crystal
X2	16MHz	SM49	CPU clock crystal
IC1	DS1307+	SOIC8	I2C-Bus CLOCK/CALENDAR
IC2	ATmega328P-AU	TQFP-32	ATmega328P-AU µ-controller
BAT1	CR1220	CR1220	SMD battery holder (CR1220)
BAT1b	CR1220-3V	CR1220	3 volt lithium battery
CON1	vertical µUSB	µUSB-V-B	vertical micro USB connector (type B) with power pins only
CON2	2x3 pin-header	2x3	ICSP, AVR ISP-6 Serial Programming Header (optional)
CON3	3-pin	SIL03	pin header to connect RX and TX for the serial communication
S1	momentary	6x6x6mm	momentary tact push button, button shaft length 6mm
S2,3	momentary	6x6x8mm	momentary tact push button, button shaft length 8mm
S2b,3b	cap	6x6	tact push button caps (white)
S4	momentary	6x6x6mm-90	90° bent momentary tact push button, button shaft length 8mm