LAOS Mainboard v05minimal » History » Version 2
jaap, 2015-04-24 15:33
| 1 | 1 | jaap | h1. LAOS Mainboard v05 - minimal configuration for 2 axis |
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| 3 | This page describes the building process of a minimal LaOS board for a 2-axis machine. |
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| 5 | h3. Bill of Materials |
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| 7 | |1||||Laos mainboard||||| |
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| 8 | 2 | jaap | |3|C1, C3, C8|100nF|Decoupling capacitors for diverse parts|100nF Ceramic capacitor, 5.08mm pin spacing|2112751||721-5240 |
| 9 | 1 | jaap | |1|C7|22nF|Input decoupling for the 7805|22nF ceramic capacitor, 100nF is fine too|1141773||721-5268|€ 0,12|| |
| 10 | 2 | jaap | |1|C4|1000uF|Voltage buffer for the Pololu's, stabilization of Vmot|1000uF capacitor, 5.0mm pin spacing, 10mm diameter; voltage rating at least 1.6 to 2 times VMOT|1855170 (moq 5)|€ 0,65|520-1090| |
| 11 | |3|C6,C10,C11|100uF|Voltage buffer for VCPU and Pololus|100uF capacitor, voltage rating at least 1.6 to 2 times VMOT|1902932||520-0996| |
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| 12 | |2|R10, R18, R19|10k|Pullup resistors for the optocoupler inputs and analog input|10 kOhm resistor|9339060||707-7745| |
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| 13 | |5|R30, R4, R5, R26, R27|1k|Diverse functions: current limiting resistors for the leds, bias resistors for the high current output transistors, voltage divider for the analog input|1kOhm resistor|9339051||707-7666| |
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| 14 | |2|R31, R32|330R|Current limiting resistors for the leds in the output optocouplers|330 Ohm resistor|9339418||707-7622| |
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| 15 | |2|R7, R8|2K2|Pullup resistors for the I2C bus|2.2kOhm resistor|9339302||707-7690| |
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| 16 | |1|J11|MBED NXP|The microcontroller that's the core of the board|mBed LPC1768 module|1761179|€ 49,73|703-9238| |
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| 17 | |1|J4|MAGJACK|Ethernet connector with magnetics|MAGJACK SI-60002-F|1137981|€ 6,27|741-8477| |
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| 18 | |1|J11|MBED NXP|Mbed Holder|2.54mm 20 Way 1 Row Straight PCB Socket|9688862|€ 2,84|509-2925| |
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| 19 | |1|U2|Hirose DM1B-DSF-PEJ(82) or Molex 502774-0891|SD card holder|Micro SD SMD: Molex 502774-0891 Regular: Hirose DM1B-DSF-PEJ(82)|2064063 / 1764373|€ 2,65|685-0788 / 720-6072| |
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| 20 | |1|D1|LEDR|This led indicates that the stepper drivers are enabled.|Low cost 3mm red led|1045372||708-2753 | |
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| 21 | |1|D2|LEDY|This led indicates the presence of VMOT|Low cost 3mm yellow led|2080002||708-2769 | |
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| 22 | |1|D3|LEDG|This led indicates the presence of a 5V supply for the microcontroller|Low cost 3mm green led|1652494||708-2756 | |
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| 23 | 1 | jaap | |2|IC1, IC2|KB847|Quadruple optocoupler for the endstops/outputs|Kingbright KB847|2001656|€ 2,04|619-2026|| |
| 24 | 2 | jaap | |2|||Socket for optocouplers, 0.3inch wide, 16 pin||1077315|€ 2,17|402-771 | |