Alarm

bbokser·persuasive_waker·hw/alarm/alarm.kicad_pcb

About the Alarm PCB

Alarm is an open source RP2040/RP2350 PCB design by bbokser, published on GitHub under the MIT license. It is a 2-layer board measuring 71 × 73 mm, with 64 components from 29 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. Other key parts include the SHT40-BD1B-R2, MAX31328NELB+, PEC11S-929K-S0015 and AS1115-BSST. By type, the board carries 18 capacitors, 16 resistors, 8 switches, 6 ICs, 4 transistors and 4 connectors.

It belongs with the displays & leds designs in this gallery.

From the project

An open source hardware alarm clock that can't be snoozed or turned off.

Persuasive Waker is an open source hardware alarm clock that can't be snoozed or turned off. The alarm is deactivated via a remote key fob, which should be placed as far from the user's bed as possible. E.g. in the bathroom.

The KiCad design files are located in the hw folder.

If you just want STLs for printing, they're here.

3. Run the following commands to install all necessary libraries.

Alarm, from the project README — From the project README

Main components on the Alarm

SHT40-BD1B-R2 MAX31328NELB+PEC11S-929K-S0015 RaspberryPi_Pico AS1115-BSST

Alarm bill of materials (BOM)

64 components, 29 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	SHT40-BD1B-R2	SHT40BD1BR2	IC1
1	MAX31328NELB+	MAX31328NELB	IC2
1	PEC11S-929K-S0015	PEC11S929KS0015	IC3
1	RaspberryPi_Pico	RaspberryPi_Pico_Original_SMD	U1
1	AS1115-BSST	QSOP-24_3.9x8.7mm_P0.635mm	U2
1	AS1115-BSST TDCR1060M	TDCG1060M_VIS	U3
1	~	RX480E	A1
1	Si1308EDL-T1-GE3	SOT65P210X110-3N	Q1
2	DMG2305UX-7	SOT96P240X115-3N	Q2, Q3
1	2SC5585TL	2SC5585TL	Q4
1	FFC2B35-24-T	FFC2B3524T	J1
1	975	975	J2
1	M20-7920642R	M207920642R	J3
1	SM04B-SRSS-TB(LF)(SN)(P) SM04B-SRSS-TB_LF__SN__P_	SM04BSRSSTBLFSNP	J4
1	CSS-I4B20-SMT-TR	CSSI4B20SMTTR	LS1
2	RKB2SJK250SMTR LFS RKB2SJK250SMTR_LFS	RKB2SJK250SMTRLFS	S1, S2
6	TL3301BF260QJ	TL3301BF260QJ	S3, S4, S5, S6, S7, S8
1	WP424IDT	WP424IDT	LED1
4	MBR0530	D_SOD-123	D1, D2, D3, D4
1	CM322522-680KL 68 uH	INDM3225X240N	L1

Show 9 more

Qty	Part	Footprint	Refs
4	4.7UF 4.7uF	C_0603_1608Metric	C1, C3, C6, C18
14	1UF 1uF	C_0603_1608Metric	C2, C4, C5, C7, C8, C9, C10, C11 +6
9	10kΩ	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R1, R3, R4, R5, R7, R8, R9, R10 +1
1	0.47Ω	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R2
1	180Ω	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R6
1	14kΩ	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R12
1	1kΩ	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R13
1	47Ω	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R14
2	130Ω	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R15, R16

Alarm design files

The KiCad project lives in the bbokser/persuasive_waker repository on GitHub; these links point at the commit this page was built from.

Alarm: common questions

What microcontroller does the Alarm use?

The Alarm is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the Alarm PCB?

The Alarm measures 71 × 73 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Alarm?

64 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Alarm design files?

From the bbokser/persuasive_waker repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Alarm design in my own project?

Yes, under the terms of its MIT license, which bbokser chose for the repository.

Can I test firmware for the Alarm without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.