HardLabs

Pir trigger

buha·pir-trigger·pcb/pir.kicad_pcb

Pir trigger PCB layout, top view — open source STM32 board by buha

About the Pir trigger PCB

Pir trigger is an open source STM32 PCB design by buha, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 80 × 100 mm, with 111 components from 51 distinct parts.

Its main chip is the STM32L476RETx, from the STM32 family. Other key parts include the MAX44009EDT+T, IRA-S210ST01 and EL817S. By type, the board carries 41 capacitors, 34 resistors, 8 diodes, 7 ICs, 5 switches and 4 connectors.

It belongs with the sensors and iot & wireless designs in this gallery.

From the project

Camera trigger using PIR sensor

Main components on the Pir trigger

MAX44009EDT+TIRA-S210ST01EL817SSTM32L476RETx

Pir trigger bill of materials (BOM)

111 components, 51 distinct parts.

QtyPartRefs
1
MAX44009EDT+T
IC1
1
IRA-S210ST01
IC2
4
EL817S
IC3, IC4, IC7, IC8
1
STM32L476RETx
U1
1
SI2323DS
Q1
2
RE1C002UN
Q2, Q3
2
32 Mhz
Y1, Y2
1
SJ-2523-SMT-TR
J1
1
GDEW027W3
J2
1
SWD
J3
1
UART
J4
1
CR2477 3V Battery
BT1
3
Jumper
JP1, JP2, JP4
1
Jumper_NC_Dual
JP3
1
IML-0688
MK1
5
SW_DPST-KSC931
SW1, SW2, SW3, SW4, SW5
1
1N4148X-TP
D1
7
MBR0530
D2, D3, D4, D5, D6, D7, D8
1
68uH
L1
1
100μF
C1
Show 31 more
QtyPartRefs
2
10μF
C2, C14
2
1μF
C3, C15
2
0.1μF
C4, C16
2
0.01μF
C5, C17
1
1000pF
C6
1
100pF
C7
1
22μF
C8
2
47nF
C9, C12
1
3.3nF
C10
1
22uF
C11
1
100u
C13
7
100nF
C18, C21, C24, C28, C34, C38, C40
2
4.7uF
C19, C31
2
100n
C20, C33
8
1uF
C22, C23, C25, C26, C27, C29, C30, C32
4
12pF
C35, C36, C37, C39
1
0.1uF
C41
1
0
R1
10
10k
R2, R3, R4, R15, R16, R19, R20, R22 +2
2
13k
R5, R8
1
56k
R6
1
680k
R7
2
1M
R9, R10
1
3.3K
R11
6
150
R12, R13, R28, R29, R30, R34
5
100k
R14, R18, R21, R23, R25
1
0.47
R17
1
1K
R27
1
36k
R31
1
2.9k
R32
1
2.2k
R33

Pir trigger design files

The KiCad project lives in the buha/pir-trigger repository on GitHub; these links point at the commit this page was built from.

Pir trigger: common questions

What microcontroller does the Pir trigger use?

The Pir trigger is built around the STM32L476RETx, from the STM32 family.

How big is the Pir trigger PCB?

The Pir trigger measures 80 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pir trigger?

111 components, from 51 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pir trigger design files?

From the buha/pir-trigger repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Pir trigger design in my own project?

Yes, under the terms of its GPL-3.0 license, which buha chose for the repository.

Can I test firmware for the Pir trigger without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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