Project

General

Profile

LAOS Mainboard v03 » History » Version 26

DaveStyles, 2013-01-23 09:47

1 2 Anonymous
h1. LAOS Mainboard v0.3
2
3 3 Anonymous
{{>toc}}
4
5 11 Anonymous
!>DSC_3506.jpg!
6 5 Anonymous
7 9 Anonymous
h2. Design files
8
9 16 peter
The KiCAD design files for this PCB are available on Github, see https://github.com/LaosLaser/Hardware/tree/master/laos-board-rev3
10 9 Anonymous
11
For a PDF of the schematics, as well as a top view image of the board, see the attachments at the end of this page.
12
13 10 Anonymous
h2. Bill of materials
14
15 12 Anonymous
The BOM lists all recommended components. You will need to modify this list to suit your needs. Common choices:
16 10 Anonymous
17
* Connector types. The HPC laser uses JST connectors. Our reference design uses Phoenix connectors, they are nice but not cheap. You may omit connectors for functions you do not require.
18
* The 7805 voltage regulator (U3) is not needed if you have a stable 5V power supply.
19
* The pololu steppers (J8,J17,J23,J32) can be omitted if you use external steppers.
20
* The TIP110 (or equivalent) transistors (Q1,Q2) and associated components can be omitted if you do not want to switch external 24V loads.
21
* The CAN bus transceiver (U1) and associated components can be omitted, as the CAN bus is not in use by the firmware yet.
22
* The USB connector can be omitted. USB file systems are not implemented yet in the firmware yet.
23
* R2 and R3 can be omitted if you use an Ethernet connector without LEDs (one would suffice, as they both just connect to the power supply).
24
25
The Ethernet connection and the SD card are essential parts of this design. 
26
27
h3. Common parts
28 2 Anonymous
29
These parts are needed for every board, no matter the type of laser it will be used for.
30 1 Anonymous
31 3 Anonymous
|_.Count|_.Component|_.RS Part No.|_.RS Price|_.Farnell Part No.|_.Farnell Price|_.Comment|
32 21 jaap
|1|Laos PCB Rev 0.3| |€ 15,00| | |Available from our WebShop: http://wiki.laoslaser.org/index.php/WebShop|
33
|1|2GB SD card|539-7804|€ 9,40| | |SD Card (cheaper at Mycom: € 4,99)|
34 2 Anonymous
|1|ARM mbed LPC1768 Module|703-9238|€ 49,53|1761179| €49,73|Mbed|
35
|1|Hirose DM1B-DSF-PEJ(82)|685-0788|€ 2,22|1764373|€2,65|reverse SD Memory Card connector|
36
|2|DIL socket,0.3in pitch, 16 pin|402-771|€ 0,18|1077315| €2,17||
37
|2|Harwin M20-7832046|681-6851|€ 5,31|9688862|€ 7,07 |Mbed Footprint|
38
|1|MAGJACK SI-60002-F|741-8477|€ 4,38|1137981|€6,27|Network connector (with LEDs: Farnell:1137983)|
39
|2|IC KB847|619-2026|€ 1,96|2001656| €1,37|(5 pcs min)|
40 23 DaveStyles
|1|100R resistor|707-7587|€ 0,02|9339043| ||
41
|1|120R resistor|707-7599|€ 0,02|9339116 | ||
42
|4|330R resistor|707-7622|€ 0,02|9339418 | ||
43
|15|1K resistor|707-7666|€ 0,02|9339051 | ||
44
|2|2K2 resistor|707-7690|€ 0,02|9339302 | ||
45 25 DaveStyles
|11|10K resistor|707-7745|€ 0,02|933060 | ||
46 26 DaveStyles
|4|100nF capacitor|721-5240|€ 0,07|2112751 | ||
47
|3|22nF capacitor|721-5268|€ 0,12|1141773 | ||
48 20 jaap
|4|100 µF capacitor (ELCO)|520-0996|€ 0,28| | |min. voltage: 12V|
49 13 david
|1|1000 µF capacitor (ELCO)|520-1090|€ 1,31| | |min. voltage: 25V (depending on your motor voltage)|
50 24 DaveStyles
|1|Red LED|708-2753|€ 0,09|1045372 | ||
51
|1|Green LED|708-2756|€ 0,11|1652494 | ||
52
|1|Yellow LED|708-2769|€ 0,11|2080002 | ||
53 21 jaap
54 3 Anonymous
55
h2. Connectors
56
57 4 Anonymous
h3. Phoenix
58 3 Anonymous
59
|_.Count|_.Component|_.RS Part No.|_.RS Price|_.Farnell Part No.|_.Comment|
60
|7|Phoenix 4-pin terminal block|189-6032|€ 3,05|3705377| |
61
|7|Phoenix 4-pin PCB header|189-6127|€ 1,04|3705195| |
62
|3|Phoenix 2-pin terminal block|189-6010|€ 1,746|3705353| |
63
|3|Phoenix 2-pin PCB header|189-6105|€ 0,51|3705171| |
64
|1|pin-header 1x4|251-8632|€ 1,056| | |
65
66 4 Anonymous
h3. JST (HPC LS3020 Pro)
67 3 Anonymous
68
The HPC LS3020 Pro uses low cost JST connectors on their cables.
69
70 4 Anonymous
|_.Count|_.Component|_.RS Part No.|_.RS Price|_.Farnell Part No.|_.Farnell Price|_.Comment|
71 3 Anonymous
|1|WUERTH ELEKTRONIK 3WAY PCB connector RIGHT ANGLE 5.08mm|189-6571|€ 0,62|1641987|€ 0,60|PCB Power connector|
72 22 jaap
|6|JST 4 pin PCB connector B4B-XH-A (LF)(SN)|543-2733|€ 0,16|1516278|€ 0,20|Stepper drivers, Endstop & Laser and I2C|
73 3 Anonymous
|2|JST 4 pin housing XHP-4|353-1636|€ 0,07|1516266|€ 0,10|For endstop and laser cable (usually provided with laser)|
74 22 jaap
|0|JST 2 pin housing XHP-2|353-1614|€ 0,05|1516264|€ 0,05|To add laser power modulation|
75
|10|JST Socket insert BXH-001T-P0.6|353-1591|€ 0,04|1516301|€ 0,05|To add laser power modulation|
76 3 Anonymous
77
_Note_ - You need to modify the cables a bit to connect to the correct pins, see description in the [[Installation_HPC|HPC installation section]]. Connectors may have significant minimum order quantity. You may ask Peter if he has some he can supply when ordering the PCB.
78
79 4 Anonymous
h3. JST (HPC LS3020)
80 3 Anonymous
81
The HPC LS3020 uses low cost JST connectors on their cables.
82
83 4 Anonymous
|_.Count|_.Component|_.RS Part No.|_.RS Price|_.Farnell Part No.|_.Farnell Price|_.Comment|
84 3 Anonymous
|1|WUERTH ELEKTRONIK 3WAY PCB connector RIGHT ANGLE 5.08mm|189-6571|€ 0,62|1641987|€ 0,60|PCB Power connector|
85
|3|JST 4 pin PCB connector B4B-XH-A (LF)(SN)|543-2733|€ 0,16|1516278|€ 0,20|Stepper drivers, Endstop & Laser and I2C|
86
|2|JST Socket insert BXH-001T-P0.6|353-1591|€ 0,04|1516301|€ 0,05|To add laser power modulation|
87
|1|FFC / FPC connector|718-8772 (straight, untested)|€ 0,18|1816463|€ 0,30|This connector combines X-axis and endstops!|
88 6 Anonymous
89
h2. Pololu Stepper Drivers
90
91
|_.Number|_.Component|_.RS Part No.|_.RS Price|_.Farnell Part No.|_.Farnell Price|_.Comment|
92 13 david
|2-4|Pololu stepper drivers| | | | |Depending on how many axes your machine has|
93 6 Anonymous
|4-8|8x1 pin-header socket|495-8587|€ 1,25|3419101|€ 0,56|You need 2 for each Pololu|
94
95
The Pololu you need is of the type A4988: http://www.pololu.com/catalog/product/1182
96
97
We recommend a heatsink with the pololu, as sold here: "ultimachine.com":http://ultimachine.com/content/pololu-a4988-stepper-driver-heatsink-kit and here: "reprap.me":http://reprap.me/epages/reprap_nu_4149051.sf/en_US/?ObjectPath=/Shops/reprap_nu_4149051/Products/Pololu
98 7 Anonymous
99
h2. Other parts
100
101
|_.Number|_.Component|_.RS Part No.|_.RS Price|_.Farnell Part No.|_.Farnell Price|_.Comment|
102
|1|7805|398-697|€ 0,23| | |Power regulation (see below)|
103
|1|2x4 DIL socket|402-759| | | |Canbus IC holder|
104
|1|65HVD251 CAN chip|662-4321| | | |Canbus IC|
105
|1|USB connector|719-9438| |1642033| |Usb Host connector|
106
|1-2|TIP 110|485-9648| |9294201| |Analog output|
107
108
h3. Power regulation
109
110 13 david
If your laser does not have a good 5V power supply built-in, you can add this 7805 power regulator. Note that it will get very hot if you feed it a high voltage. Anything between 7 and 12 volt should be ok. You can use a left-over power adapter to power the board.
111 7 Anonymous
112
The HPC series have a 5V power output built-in.
113
114 14 jaap
h2. Older versions
115
116
The history of mainboards is available in [[Mainboard_Revisions]]
117
118 7 Anonymous
h2. Attachments