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https://git.sr.ht/~jacqueline/tangara-hw
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70 lines
2.8 KiB
Markdown
70 lines
2.8 KiB
Markdown
# Bill of Materials
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This is a list of every part needed to assemble one Tangara.
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| Component | Manufacturer + part number |
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|-------------------------------|----------------------------|
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| Mainboard PCB | See `tangara-mainboard` |
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| Faceplate PCB | See `tangara-faceplate` |
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| Touchwheel cover (0.6mm FR4) | See `touchwheel-cover` |
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| 15 pos 0.5mm pitch FFC cable | Samtec FJH-15-R-03.00-4 |
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| 4x 6mm M2 standoffs | Wurth 970060244 |
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| 4x 14mm countersunk M2 screws | Accu SHK-M2-14-V2-A2 |
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| 4x 8mm countersunk M2 screws | Accu SHK-M2-8-V2-A4 |
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| Case top half | See `case-v2` |
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| Case bottom half | See `case-v2` |
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| Switch cover | See `case-v2` |
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| 2x Button covers | See `case-v2` |
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| SD card cover | TBD |
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| 3-pin 2200mAh 604560 LiPo | EcoCell LIP2-001 |
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| Haptic motor | TBD |
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We're currently finalising our production v2 case design, including the SD card
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cover. Full sources for these will be available once they're finished.
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Notes on selecting alternatives for specific parts are given below.
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## Display
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The display is considered a part of the faceplate, but there's enough options
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for sourcing that it's worth a few notes here.
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- For production, we're using ER-TFT018-4 from EastRising Technology Co.
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- [Adafruit's JFT-1800](https://www.adafruit.com/product/618) panel should also work fine.
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- Most ST7735R / ST7735S displays available on AliExpress should work fine.
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## FFC Cable
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For all current mainboard and faceplate revisions, we use an FFC connector with
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tin plated contacts. You should therefore try to pick an FFC cable that has tin
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plated contacts, to avoid corrosion.
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Aside from the Samtec cable listed about, you might also consider:
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- Molex 98266-0836
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- GCT 05-15-D-0076-A-4-06-4-T
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## Screws
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Any 14mm and 8mm countersunk M2 screws will be fine. We've used Torx head for
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our production units because we're big nerds, but you can often find hex and
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Phillips head screws easily from local suppliers.
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## Battery
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For the battery, note that a 2-pin cell may be compatible if R1 on the
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mainboard PCB is populated with a 10k 0603 resitor. We recommend sourcing a
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suitable battery locally, as international shipping of LiPo batteries can be
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difficult.
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## Haptics
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Tangara's haptic motor driver supports both LRA (closed and open-loop) and ERM
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haptic motors, so sourcing a compatible motor is very easy. We'll update this
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BOM once we've locked in our production motor, but some compatible choices are:
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- Vybronics Inc. VG0832022D (LRA)
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- Vybronics Inc. VC1034B018F (ERM)
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- Adafruit 1201 (ERM)
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- DFRobot FIT0774 (ERM)
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