docs/hardware/rev_b.md

# Rev.B (With or without front light)

<img src="../media/Rev.B/IMG_3310.jpeg" width="750"/>

# Parts list

| **#** 	| **Part**                           	| **Amount** 	| **Optional** 	| **Remarks**                                          	|
|-------	|------------------------------------	|------------	|--------------	|------------------------------------------------------	|
| 1.     	| Main PCB                           	| 1          	|              	|                                                      	|
| 2.     	| 2.13 inch B/W ePaper display 	| 7          	|              	| WeAct 2.13-Black-White or included in some kits. <br>Buy at [AliExpress](https://www.aliexpress.com/item/1005004644515880.html?pdp_ext_f=%7B%22sku_id%22%3A%2212000031468032209%22%7D)<br>Make sure you select the right version 2.13-Black-White! B/W/R is not usable.	|
| 3.     	| Front PCB                     	| 1          	| Yes          	|                                                      	|
| 4.     	| Acryl front and back               	| 1          	| Yes          	|                                                      	|
| 5.     	| M3x6 standoff M-F                  	| 4          	|              	| Included in screw set                                	|
| 6.      	| M3x6 screw                         	| 54         	|              	| Included in screw set                                	|
| 7.     	| M3x8 standoff M-F                  	| 8          	|              	| Included in screw set                                	|
| 8.     	| M3x11 standoff F-F                 	| 28         	|              	| Included in screw set                                	|
| 9.     	| M3x12 standoff F-F                 	| 2         	|              	| Included in screw set                                    |
| 10.    	| M3x10 screw                        	| 4          	|              	| Included in screw set                                	|
---

# Board revisions

| PCB Version 	| Version blockhash                                                	| Changelog   	|
|-------------	|------------------------------------------------------------------	|---	|
| Rev.B-01      	| [000000000000000000014684133a4d63ab75f40ea0ece278157521dd983eadf7](https://mempool.space/block/000000000000000000014684133a4d63ab75f40ea0ece278157521dd983eadf7) 	| First Beta  	|
| Rev.B-02      	| [00000000000000000003509af203f00a74cada8024e017982fe9c499751f36de](https://mempool.space/block/00000000000000000003509af203f00a74cada8024e017982fe9c499751f36de) 	| Second Beta   |
| Rev.B-03        | [000000000000000000008dfc59d82518a12888f17fb0213fe0db8102afffe0cd](https://mempool.space/block/000000000000000000008dfc59d82518a12888f17fb0213fe0db8102afffe0cd)  | Final Version |

# Hardware assembly (Place screws and standoffs)

<img src="../media/Rev.B/IMG_3314.jpeg" width="750"/>
<img src="../media/Rev.B/IMG_3313.jpeg" width="750"/>

First, place all the 11mm female - female standoffs (Orange) at the front of the main PCB with the 6mm screws. Keep in mind that at te top-corners at the back you have to use the 8mm female - male standoffs, this also applies to the, one out-of-the middle 2 at the top of the back. At the bottom of the, one out-of-the middle 2 you also have to use the 8mm female - male standoffs (Green).

Mount the two M3x12 standoff F-F (Yellow) at the front with the last two of the M3x8 standoff M-F (Green)

Place the displays on the top of the 11mm standoffs and mount them with the 6mm screws.

**NOTE**: The WeAct displays have 8 pins, the displays with frontlight have 10 pins. They both work fine with the Rev. B board. When using WeAct displays the two most right pins are not used. 

<img src="../media/Rev.B/IMG_3317.jpeg" width="750"/>

Keep in mind that at the corners on the top of the first (left corner) and last (right corner) display you don't use a screw, this is where a 6mm standoff has to placed to screw the front pcb in combination with acrylic front. For mounting the fromt pcb with the acrylic front use the M3x10 screw.

<img src="../media/Rev.B/IMG_3310.jpeg" width="750"/>

At last, place the acrylic back on the back with the last 8 M3x6 screws.