Partslist
Example suppliers have no affiliation to the project. There is no payment or endorsement involved in these examples. They are simply examples of where these parts can be found.
Many of these examples are bulk purchases for building 50-100 units.
| Quantity | Item | Notes | Example supplier |
|---|---|---|---|
| 1 | ESP8266 microprocessor (ESP-12F tested with firmware) | Any ESP-12 module should work, but we specifically used ESP-12F from AI Thinker in all of our development and testing | https://www.ebay.com/itm/282048397266 |
| 1 | 640x384, 7.5inch E-Ink display. Black and white ONLY. | See article on screens and driver boards for compatibility. | Item discontinued by manufacturer |
| 1 | GooDisplay DESPI-C02 driver board | See article on screens and driver boards for compatibility. | http://www.buy-lcd.com/development-kit-connection-adapter-board-for-e-paper-display-demo-kit-p0027.html |
| 1 | 6 Pin USB 2.0 to TTL UART Module Serial Converter CH340G Module STC 5V/3.3V | Any USB to Serial converter will work, but this style was designed to work with the 1x3 pitch pin header below. | https://www.ebay.com/itm/322596456070 |
| 1 | HT7333 3.3v voltage regulator in SOT-89 package | See discussion on power regulation for more information on the HT7333 | https://www.ebay.com/itm/251146519807 |
| 1 | Low leakage current 6.3v 1000uF capacitor | See discussion on use of low leakage capacitors under power regulation | Nichicon UKL0J102MPD |
| 1 | Low leakage current 16v 10uF capacitor | See discussion on use of low leakage capacitors under power regulation | https://www.mouser.com/ProductDetail/Nichicon/UKL1C100MDDANATD |
| 1 | 470pF capacitor | Used to debounce the reset switch | https://www.mouser.com/ProductDetail/594-K471K15X7RF53H5 |
| 3 | 1/8 watt, 5mm spacing 10k Ohm resistor | Other resistance values were tested, but these seemed to be the most reliable. | https://www.ebay.com/itm/251931248978 |
| 3 | 1/8 watt, 5mm spacing 470 Ohm resistor | Other resistance values were tested, but these seemed to be the most reliable. | https://www.ebay.com/itm/251931239090 |
| 1 | 1x3 pitch pin header, right angle, 2.54mm | Used to interface with the serial flash module | https://www.ebay.com/itm/282838405203 |
| 1 | SS13D07 Slide Switch 1P3T 4Pin W/ Handle 6mm 3 position | Admin-Run-Flash switch. The slider on the switch may be too long to fit inside the case. Simply cut off part of the slider with a pair of diagonal cutters. | https://www.ebay.com/itm/201752610967 |
| 1 | 6x6x14.5mm Right Angle 2 Pin Momentary Tactile Tact Push Button Switch | Reset switch | https://www.ebay.com/itm/182286331698 |
| 1 | Micro JST PH 2.0 2Pin Right-Angle Socket Male and Connector Female w./ wire | Power cable between battery plates and the PCB | https://www.ebay.com/itm/263418795201 |
| 1 | 2.54mm 90° Right Angle Male Pin Header Single Row 1x8P | Used to interface with the GooDisplay driver board | https://www.ebay.com/itm/143246870552 |
| 1 | Dupont Jumper wire Female-to-Female | Used to interface between driver board and the wall-ink circuit board | https://www.ebay.com/itm/322992751056 |
| 2 | Battery conversion plate (Contains a positive and negative battery terminal on one piece of metal) | Plates from different manufacturers may be different widths, make sure your 3d printed battery modules match the width of your conversion plates and terminal clips. | https://www.ebay.com/itm/113014203825 |
| 1 pair | One positive battery terminal and one negative battery terminal | Do note that not all battery terminals are exactly the same size. Make sure to match the size of your battery terminals to the case that you 3D print. You may need to alter the 3D print model to match your terminals. | https://www.amazon.com/VNDEFUL-Battery-Positive-Negative-Conversion/dp/B072379C1R/ |
| 2 | M2 x 6mm Black Phillips Cross Pan Head Self Tapping Electronic Screws | These longer screws are used to secure the screen assembly to the case back that is attached to the wall. This is to prevent "curious hands" from removing the device from the wall. | https://www.ebay.com/itm/182563734073 |
| 4 | M2 x 4mm Black PHillips Cross Pan Head Self Tapping Electronic Screws | These shorter screws are used to attach the PCB to the case. | https://www.ebay.com/itm/182563732464 |
| 3M double-sided 467MP 200MP adhesive tape | Used to attach faceplate to screen front. Other adhesives may work. | https://www.ebay.com/itm/272609732550 |
| Quantity | Item | Notes | Example supplier |
|---|---|---|---|
| 1 | Printed circuit board | Use provided gerber files and have the boards made at a place such as jlcpcb.com, elecrow.com, or oshpark.com | |
| 1 | Case back / mounting bracket | Use provided CAD files and 3D print | |
| 1 | Case front / circuit board mount / battery holder | Use provided CAD files and 3D print | |
| 1 | Faceplate | Use provided CAD files and 3D print, or have them milled for more visually-appealing effect. Ours were milled using an engraving machine at a sign shop. |