HardLabs

Serial squid

thestumbler·serial-squid·sch/squid.kicad_pcb

Serial squid PCB layout, top view — open source NXP board by thestumbler

About the Serial squid PCB

Serial squid is an open source NXP PCB design by thestumbler, published on GitHub. It is a 2-layer board measuring 216.7 × 240 mm, with 300 components from 57 distinct parts.

Its main chip is the LPC1769, from the NXP family. Other key parts include the 74HCT4066, SN75176B, MAX3241E, TJA1040 and 74HCT595. By type, the board carries 110 resistors, 69 capacitors, 36 diodes, 28 ICs, 25 connectors and 20 transistors.

From the project

Serial communications hub project for embedded systems development.

The Serial Squid is a serial communications hub, useful for the development and testing of embedded systems projects. It can be operated stand-alone or remotely. True to its namesake, the Serial Squid has eight arms, two tentacles, and a round body. The I/O ports are found on the appendages, and the user interface and other supporting circuitry is found on the head and main body.

Main components on the Serial squid

74HCT4066SN75176BMAX3241ETJA104074HCT595LPC1769FT232RPIC16F1847LM3526-LDP83848MIC39100-3.3MCP1322

Serial squid bill of materials (BOM)

300 components, 57 distinct parts — part numbers from the project's BOM.

QtyPartRefs
11
74HCT4066
U1, U2, U3, U8, U10, U11, U12, U19 +3
2
SN75176B
U4, U5
3
MAX3241E
U6, U9, U20
1
TJA1040
U7
4
74HCT595
U13, U14, U15, U16
1
LPC1769
U17
1
FT232R
U18
1
PIC16F1847
U22
1
LM3526-L
U24
1
DP83848
U25
1
MIC39100-3.3
U26
1
MCP1322
U27
8
2N3904
Q1, Q12, Q13, Q14, Q15, Q16, Q17, Q20
10
DMG1013
Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 +2
1
2N2222
Q18
1
2N3906
Q19
1
12MHz
Y1
1
32.768KHz
Y2
1
50MHz
Y3
3
HDR-1x10
J1, J5, J16
Show 37 more
QtyPartRefs
1
TERM-BLOCK-5
J2
5
BOXHDR-2x5
J3, J4, J6, J8, J15
2
BOXHDR-2x10
J7, J20
3
HDR-1x6
J9, J11, J19
1
HDR-1x9
J10
2
BOXHDR-2x3
J12, J13
2
HDR-1x4
J14, J25
3
USB-MICRO-B
J17, J23, J24
1
MINIDIN6
J18
1
RJ45-MAGS
J21
1
USB-TYPE-A
J22
1
LCD-4x20
DS1
1
BUZZER
LS1
1
SW_NAVI
S1
2
SW_PUSH
S2, S3
2
SW_PUSH_RA
S4, S5
1
SD-SOCKET
XA1
1
CR2032-SOCKET
XBT1
27
LED-GREEN
D1, D2, D3, D4, D5, D6, D7, D8 +19
7
1N4148
D21, D22, D23, D24, D25, D26, D27
2
BAT54
D28, D29
57
0.1uF
C1, C2, C3, C4, C5, C6, C8, C9 +49
1
0.001uF
C7
4
18pF
C10, C11, C12, C13
2
0.47uF
C19, C20
3
10uF
C22, C28, C59
2
1.0uF
C27, C39
11
1K
R1, R38, R56, R65, R66, R67, R68, R72 +3
51
10K
R2, R3, R4, R5, R6, R7, R8, R9 +43
30
220
R11, R12, R13, R14, R15, R22, R23, R24 +22
2
60
R18, R19
1
20K
R42
7
4.7K
R52, R98, R99, R107, R108, R109, R110
4
49.9
R80, R81, R82, R83
1
1.5K
R85
1
100K
R86
2
15K
R94, R95

Serial squid design files

The KiCad project lives in the thestumbler/serial-squid repository on GitHub; these links point at the commit this page was built from.

Serial squid: common questions

What microcontroller does the Serial squid use?

The Serial squid is built around the LPC1769, from the NXP family.

How big is the Serial squid PCB?

The Serial squid measures 216.7 × 240 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Serial squid?

300 components, from 57 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 Serial squid design files?

From the thestumbler/serial-squid repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Serial squid design in my own project?

The repository has no license, so all rights stay with thestumbler. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Serial squid without the hardware?

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

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