HardLabs

Central control unit

RomLab·pcb-system-for-underfloor-heating-v2.0·kicad-v7.0.9/central-control-unit/central-control-unit/central-control-unit.kicad_pcb

Central control unit PCB layout, top view — open source Raspberry Pi board by RomLab

About the Central control unit PCB

Central control unit is an open source Raspberry Pi PCB design by RomLab, published on GitHub. It is a 4-layer board measuring 255.9 × 224.5 mm, with 735 components from 81 distinct parts.

Its main chip is the DS1023-2-20S21, from the Raspberry Pi family. Other key parts include the LTC4231HMS-2#PBF, TPS7B8733QKVURQ1, MCP23S17-E/SP, SN74HCS4075QPWRQ1 and SN74HCS32QPWRQ1. By type, the board carries 275 resistors, 164 connectors, 101 diodes, 89 capacitors, 74 transistors and 32 ICs.

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

From the project

PCB for underfloor heating system

There are here schematics, PCBs, 3D views and Gerber data for devices in underfloor heating system. There are two types folders with version KiCAD 5 and KiCAD 7. The libraries are here.

More information at https://github.com/RomLab/system-for-underfloor-heating-v2.0

Main components on the Central control unit

LTC4231HMS-2#PBFTPS7B8733QKVURQ1MCP23S17-E/SPSN74HCS4075QPWRQ1SN74HCS32QPWRQ1TLP2345TXS0108EPWRPCA9615

Central control unit bill of materials (BOM)

735 components, 81 distinct parts.

QtyPartRefs
5
LTC4231HMS-2#PBF
Analog Devices
U1, U2, U3, U4, U7
2
TPS7B8733QKVURQ1
U5, U6
1
MCP23S17-E/SP
Microchip
U8
3
SN74HCS4075QPWRQ1
Texas Instruments
U9, U10, U11
1
SN74HCS32QPWRQ1
Texas Instruments
U12
16
TLP2345
U13, U14, U15, U16, U17, U18, U19, U20 +8
3
TXS0108EPWR
Texas Instruments
U23, U24, U26
1
PCA9615
U25
10
AOB1608L
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +2
39
PMV213SN,215
Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16 +31
2
YJL2305A
Q17, Q18
10
AOD458
Q23, Q24, Q25, Q26, Q27, Q28, Q35, Q36 +2
2
YJD20N06A
Q56, Q57
11
BXT600P03M
Q58, Q59, Q60, Q61, Q62, Q63, Q64, Q65 +3
15
EBBA-02-C-SS-BU
J1, J2, J3, J4, J5, J6, J7, J8 +7
1
AKZ770_3-5.08-V-GREEN
J12
20
1x4_idc_lsa
J17, J18, J19, J20, J24, J27, J28, J29 +12
10
54601-908WPLF
J21, J22, J23, J25, J26, J35, J36, J37 +2
6
EBBA-03-C-SS-BU
J47, J48, J49, J50, J51, J52
35
95293-101A03LF
P1, P2, P3, P5, P6, P7, P8, P9 +27
Show 61 more
QtyPartRefs
1
DS1023-1-20S21
P4
69
10129380-902001BLF
P25, P27, P29, P31, P32, P33, P34, P35 +61
1
DS1023-1-4S21
P26
2
molex_kk_254_1x02_2.54mm_22112022_vertical
P28, P30
2
95278-101A20LF
P45, P46
1
DS1023-2-20S21
P115
1
DS1021-2-20SF11-B
P116
1
SMBJ12CA-E3/52
D1
3
SMCJ5.0CA-13-F
D2, D3, D4
7
LL-503VC1E-4C
D5, D6, D7, D8, D11, D12, D14
2
STPS1L30U
D9, D10
1
SMBJ24CA-TR
D13
10
LL-504PGC1E-G5-2B
D15, D16, D19, D20, D21, D22, D33, D34 +2
12
STPS160A
D17, D18, D23, D24, D25, D26, D37, D38 +4
9
PMEG40T30EPX
D27, D28, D29, D90, D91, D92, D93, D94 +1
26
SD05-7
D30, D31, D32, D51, D52, D53, D54, D55 +18
10
DS9503_us
D41, D42, D43, D44, D45, D56, D62, D63 +2
10
UCLAMP0501H.TCT
D46, D47, D48, D49, D50, D57, D66, D67 +2
10
SMDA05CDR2G
D74, D75, D76, D77, D78, D79, D80, D81 +2
44
100nF
C1, C2, C3, C4, C9, C10, C11, C12 +36
12
100uF
C5, C6, C7, C8, C17, C18, C19, C20 +4
4
2.2nF
C13, C14, C15, C28
1
3.9nF
C16
4
10uF
C21, C22, C23, C24
1
220nF
C27
23
1uF
C29, C35, C36, C37, C39, C41, C43, C46 +15
10
10R
R1, R2, R3, R4, R32, R33, R34, R35 +2
1
649k
R5
1
7k32
R6
1
11k
R7
1
61k9
R8
4
825k
R9, R14, R19, R55
3
12k1
R10, R15, R20
3
4k12
R11, R16, R21
3
13k7
R12, R17, R22
3
150k
R13, R18, R23
15
100k
R24, R25, R26, R27, R40, R41, R42, R43 +7
3
47m
R28, R30, R60
1
15m
R29
1
100m
R31
24
1k
R36, R37, R38, R39, R64, R99, R101, R112 +16
1
1k02
R48
3
330R
R49, R50, R51
2
150R
R52, R53
1
1k6
R56
1
2k74
R57
1
32k4
R58
67
10k
R62, R63, R68, R69, R70, R71, R72, R73 +59
1
2k21
R67
10
576R
R94, R95, R102, R103, R104, R105, R133, R134 +2
10
1k8/0.5W
R96, R97, R106, R107, R109, R110, R137, R138 +2
10
NC (10k)
R98, R100, R108, R111, R113, R115, R141, R142 +2
9
250R
R127, R128, R129, R254, R255, R256, R257, R258 +1
55
10R/0.5W
R130, R131, R132, R162, R163, R164, R165, R166 +47
6
1k15
R203, R204, R205, R206, R207, R208
2
T910Y
R229, R231
2
0R
R230, R232
4
210R
R233, R237, R238, R242
4
390R
R234, R236, R239, R241
2
100R/120R
R235, R240
10
NC (100R)
R266, R267, R268, R269, R270, R271, R272, R273 +2

Central control unit design files

The KiCad project lives in the RomLab/pcb-system-for-underfloor-heating-v2.0 repository on GitHub; these links point at the commit this page was built from.

Central control unit: common questions

What microcontroller does the Central control unit use?

The Central control unit is built around the DS1023-2-20S21, from the Raspberry Pi family.

How big is the Central control unit PCB?

The Central control unit measures 255.9 × 224.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Central control unit?

735 components, from 81 distinct parts. The full bill of materials is listed on this page.

Where can I download the Central control unit design files?

From the RomLab/pcb-system-for-underfloor-heating-v2.0 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Central control unit design in my own project?

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

Can I test firmware for the Central control unit without the hardware?

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

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