EasyEDA User rodyne
rodyne
Public Project: 17 Footprint Package: 59 Likes: 29 Favorites: 25 Views: 15660

RPI GPIO Motherboard Rev 5

1 year ago  

License: Public Domain

Status: Complete

PT100, Raspberry Pi
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This project reads 4 x PT100 temperature probes and controls 8 relays (4 heating and 4 cooling) the board mounts a Raspberry Pi which it provides filtered power for and acts as an I2C slave device for the RPi to control, advanced monitoring of the RPi activity will allow a full reset of the RPi should it become unresponsive.

The analog side is based on the Microchip AN687 design with an analog multiplexor to select the PT100 channels. Two precision calibration resistors are also integrated in to other channels in the mux allowing automatic temperature calibration down without any manual calibration at around 0.3 degC (errors due to variations in channel on resistance in the mux)

The system is Completed and tested.

Please see attached documentation and firmware

Copies also at rodyne.com

Schematic Version 5

Schematic Version 5

PCB Version 5

PCB Version 5

Attachments

FilenameDownload
RPI Temperature IOl Board R5.docDownload
RPI Temperature IO Board.X.zipDownload

BOM

IDValueQty.PackageComponentsManufacturer PartSupplierRS-OnlineSeeedStudio
12N70029WSOT-23Q1,Q2,Q3,Q4,Q5,Q6,Q7,Q8,Q9
21N40018SOD123D1,D2,D3,D4,D5,D6,D7,D8
3PWR10805L7
4LM2576HVS-5.0NOPB1TS5BU9
5150u1CD127 12*12MM BOZL8
6hot1Screw Terminal 5mm 5PU1
7cold1Screw Terminal 5mm 5PU3
8analog1Screw Terminal 5mm 12PU2
9PWR1TERMINAL_BLOCK_2P_5U7
1022u1DR74L9DR74-220-RRS-Online770-1151
1110k30805R25,R27,R4
1210080805C4,C7,C9,R9,C11,C12,C13,C14
13RELAY SPST8OMRON G5NBRLA1,RLA2,RLA3,RLA4,RLA5,RLA6,RLA7,RLA8
14PIC16F1782-ESO1SOIC-28U5
15MCP607-ISN2SOIC-8U4,U6
16100k20805R6,R5
1749.9k10805R11
181k1RC08R26
190.331C1210C5
2025k40805R17,R15,R21,R23
212k10805R19
22AN110805L1
231k30805R14,R13,R20
24AN210805L2
255V10805L6
261.5k10805R22
273V3 PIC10805L5
2810u1C1210C6
2925K20805R8,R7
30100n20805C3,C2
313.09K10805R12
32Raspberry Pi 21HDR2X20-reversedCN1
331.5A 24V PTC1PTC1812LF1
34ss341SMA-DIODED9
35100u1PANASONIC_SKV_CAPC10
36ICSP11X05_LOCKJP1
3749.9K10805R10
38L78L33ABUTR1SOT89U8
39220uF2ELECTRO-SMD-C-6MMCT1,CT2CS1E221M-CRE77SeeedStudio302030053
40ALM1BZ2-7.6-D12.0XH6.5MMALMKS-12065D03YASeeedStudio312010004
4112410805R16
4295.310805R18
43TP1mA1PAD.03X.04TP1
44TP-ADC-IN1PAD.03X.04TP2
45TP-Vref1PAD.03X.04TP3
46NX3L40512TSSOP-16U13,U10
4710uH1L0806L3LQH2MCN100K02LSeeedStudio303010042
48010805R1
49TP-GND1PAD.03X.04TP4

Comments

LovroBedek

Can you contact me on [email protected] for info for buying some and some other questions? Thanks

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