Complete soldering.md
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# Plaid // Through hole docs
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## Kit assembly
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- [BOM(parts list)](BOM.md)
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- Assembly
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- Bootloader & Firmware
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![plaid pcb](./img/plaid_pcb_top.jpg)
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## Assembly ALPHA ver
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- Build guide for alpha
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- [build_guide_rev_alpha_en.md](./alpha/build_guide_rev_alpha_en.md)
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- [build_guide_rev_alpha_jp.md](./alpha/build_guide_rev_alpha_jp.md)
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## Assembly
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1. [Check BOM(parts list)](BOM.md)
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2. [Solder components, excluding switches](soldering.md)
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3. [Bootloader](bootloader.md)
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4. [Firmware](firmware.md)
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5. Solder switches and assembly
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## ALPHA PCB
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- [build_guide_rev_alpha_en.md](./alpha/build_guide_rev_alpha_en.md)
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- [build_guide_rev_alpha_jp.md](./alpha/build_guide_rev_alpha_jp.md)
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doc/bootloader.md
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doc/soldering.md
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# Assembly
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## Before starting assembly
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- Check the components are complete. See [BOM](assembly.md).
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- If you are not used to soldering, learn how to solder components.
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- https://learn.adafruit.com/adafruit-guide-excellent-soldering/tools
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## Soldering
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### Zener diodes (D49,50)
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![zener diode](./img/assembly/1.JPG)
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Solder D49 and D50.
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Diode is a `polarized` component and therefore take care of direction.
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A Black line on diode is cathode. (square pad on pcb)
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### Resistors (R1,2,3,4,7,8)
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![resistor](./img/assembly/2.JPG)
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Solder resistors.
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Don't place on R5 and R6. (They are for i2c)
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| Ref | Value | Color code |
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|--------|-------|-------------------------|
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| R1,7,8 | 1.5k | Brown/Green/Red/Gold |
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| R2,3 | 75 | Purple/Green/Black/Gold |
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| R4 | 10k | Brown/Black/Orange/Gold |
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| R5,6 | I2C | Do not place |
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### Diodes 1N4148 (D1-48)
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![1N4148](./img/assembly/3.JPG)
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Solder D1-D48.
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Diode is a `polarized` component and therefore take care of direction.
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A Black line on diode is cathode. (square pad on pcb)
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### Crystal
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![crystal](./img/assembly/4.JPG)
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Solder crystal.
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### Capacitors (C1,2,4,5)
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![MLCC](./img/assembly/5.JPG)
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There are 2 kinds of lead pitch.
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| Ref | Value | Lead pitch |
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|------|-------|------------|
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| C1,2 | 22pF | 2.5mm |
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| C4,5 | 0.1uF | 5mm |
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### USB connector
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![USB](./img/assembly/6.JPG)
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Narrow pitch! Be careful of solder bridge between pins.
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### LEDs
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![LED](./img/assembly/7.JPG)
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LED is a `polarized` component and therefore take care of direction.
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A short leg is cathode. (square pad on pcb)
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If you use leds, make bridge J4 and J5 on bottom side.
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![LED jumper](./img/assembly/8.JPG)
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### IC socket
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![ic socket](./img/assembly/9.JPG)
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Solder IC socket.
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IC socket is a `polarized` component and therefore take care of direction.
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Check the notch on silk and IC Socket.
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### Electrolytic capacitor(C3) and Resettable fuse(F1)
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![Electrolytic capacitor and resettable fuse](./img/assembly/10.JPG)
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Electrolytic capacitor is a `polarized` component and therefore take care of direction.
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A short leg is cathode. (square pad on pcb)
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And after soldering resettable fuse, bend like the image.
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### Tactile Switch(SW50,51) and pin header
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![SW and pin header](./img/assembly/11.JPG)
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||||
### ATMEGA328p
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![ATMEGA328p](./img/assembly/12.JPG)
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||||
Insert ATMEGA328P into IC Socket.
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||||
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||||
ATMEGA328 is a `polarized` component and therefore take care of direction.
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||||
See the image.
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||||
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||||
## Check list before connect USB
|
||||
- No short between VCC and GND, USB connector pins.
|
||||
- Direction of polarized components.(ATMEGA328p, diode, resettable fuse, electrolytic capacitor)
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||||
- Resistor value
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