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LAOS Mainboard v05minimal » History » Revision 1
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jaap, 2015-04-24 09:43
LAOS Mainboard v05 - minimal configuration for 2 axis¶
This page describes the building process of a minimal LaOS board for a 2-axis machine.
Bill of Materials¶
| 1 | Laos mainboard | ||||||||
| 3 | C1, C3, C8 | 100nF | Decoupling capacitors for diverse parts | 100nF Ceramic capacitor, 5.08mm pin spacing | 2112751 | 721-5240 | € 0,07 | niet: C2,C5 | |
| 1 | C7 | 22nF | Input decoupling for the 7805 | 22nF ceramic capacitor, 100nF is fine too | 1141773 | 721-5268 | € 0,12 | ||
| 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 | € 1,31 | |
| 4 | C6,C9,C10,C11 | 100uF | Voltage buffer for VCPU and Pololus | 100uF capacitor, voltage rating at least 1.6 to 2 times VMOT | 1902932 | 520-0996 | € 0,28 | ||
| 5 | R10, R18, R19, R21, R22 | 10k | Pullup resistors for the optocoupler inputs and analog input | 10 kOhm resistor | 9339060 | 707-7745 | € 0,02 | ||
| 13 | R12, R15, R17, R30, R2, R3, R4, R5, R23, R24, R26, R27, R33 | 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 | € 0,02 | ||
| 4 | R28, R29, R31, R32 | 330R | Current limiting resistors for the leds in the output optocouplers | 330 Ohm resistor | 9339418 | 707-7622 | € 0,02 | ||
| 1 | R34 | 100R | Limiting/protection resistor for the microcontroller's analog input | 100 Ohm resistor | 9339043 | 707-7587 | € 0,02 | ||
| 2 | R7, R8 | 2K2 | Pullup resistors for the I2C bus | 2.2kOhm resistor | 9339302 | 707-7690 | € 0,02 | ||
| 1 | J11 | MBED NXP | The microcontroller that's the core of the board | mBed LPC1768 module | 1761179 | € 49,73 | 703-9238 | € 49,53 | |
| 1 | J4 | MAGJACK | Ethernet connector with magnetics | MAGJACK SI-60002-F | 1137981 | € 6,27 | 741-8477 | € 4,38 | |
| 1 | J11 | MBED NXP | Mbed Holder | TE Connectivity 2.54mm 40 Way 2 Row Straight PCB Socket Through Hole Socket Strip | 9688862 | € 2,84 | 509-2925 | € 3,69 | |
| 1 | U2 | Hirose DM1B-DSF-PEJ or Molex 502774-0891 | SD card holder | Micro SD SMD: Molex 502774-0891 Regular: Hirose DM1B-DSF-PEJ | 2064063 / 1764373 | € 2,65 | 685-0788 / 720-6072 | € 2,22 | |
| 1 | D1 | LEDR | This led indicates that the stepper drivers are enabled. | Low cost 3mm red led | 1045372 | 708-2753 | € 0,09 | ||
| 1 | D2 | LEDY | This led indicates the presence of VMOT | Low cost 3mm yellow led | 2080002 | 708-2769 | € 0,11 | ||
| 1 | D3 | LEDG | This led indicates the presence of a 5V supply for the microcontroller | Low cost 3mm green led | 1652494 | 708-2756 | € 0,11 | ||
| 2 | IC1, IC2 | KB847 | Quadruple optocoupler for the endstops/outputs | Kingbright KB847 | 2001656 | € 2,04 | 619-2026 | ||
| 2 | Socket for optocouplers, 0.3inch wide, 16 pin | 1077315 | € 2,17 | 402-771 | € 0,18 |
Updated by jaap over 9 years ago · 1 revisions