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The [http://www.calcwatch.com/history.htm history of the uWatch] mentions the 53mm x 20mm compact 16x2 line LCD that convinced David L. Jones that the uWatch project was actually doable with off-the-shelf components. | The [http://www.calcwatch.com/history.htm history of the uWatch] mentions the 53mm x 20mm compact 16x2 line LCD that convinced David L. Jones that the uWatch project was actually doable with off-the-shelf components. | ||
If you are doing low-level programming of the uWatch, such as making "custom characters", you might want to look at [http://www.electusdistribution.com.au/products_uploaded/QP-5519-2.pdf the datasheet] (via [http://www.calcwatch.com/forum/viewtopic.php?id=37 "Moon Phases"]). | If you are doing low-level programming of the uWatch, such as making "custom characters", you might want to look at [http://www.electusdistribution.com.au/products_uploaded/QP-5519-2.pdf the datasheet] (via [http://www.calcwatch.com/forum/viewtopic.php?id=37 "Moon Phases"]). | ||
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[http://www.newhavendisplay.com/index.php?main_page=product_info&cPath=3_113&products_id=1824&zenid=goih7iect56osjf64srb498qi4 Newhaven NHD-C12832A1Z-FSW-FBW-3V3] 128x32 Pixels display. | [http://www.newhavendisplay.com/index.php?main_page=product_info&cPath=3_113&products_id=1824&zenid=goih7iect56osjf64srb498qi4 Newhaven NHD-C12832A1Z-FSW-FBW-3V3] 128x32 Pixels display. | ||
Which uses less than 100uA which would enable a continuous display watch. The "white LED backlight" uses 30 mA at 3.0 V but is still very usable at much lower currents. | Which uses less than 100uA which would enable a continuous display watch. The "white LED backlight" uses 30 mA at 3.0 V but is still very usable at much lower currents. | ||
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Proposed displays: | Proposed displays: | ||
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* [http://www.avesodisplays.com/products/index.html card display]: 6 digit, 7 segment display module designed to fit inside a credit card. lightest-weight display of those on this list; adequate for 4-function calculator watch. Doesn't seem to show enough information for a scientific calculator. | * [http://www.avesodisplays.com/products/index.html card display]: 6 digit, 7 segment display module designed to fit inside a credit card. lightest-weight display of those on this list; adequate for 4-function calculator watch. Doesn't seem to show enough information for a scientific calculator. | ||
* [http://www.sparkfun.com/commerce/categories.php?c=76 Sparkfun LCD displays]: the color graphics LCD cell phone displays look relatively low power and are extremely well documented -- some of them are under $20. | * [http://www.sparkfun.com/commerce/categories.php?c=76 Sparkfun LCD displays]: the color graphics LCD cell phone displays look relatively low power and are extremely well documented -- some of them are under $20. | ||
| − | ** [https://www.sparkfun.com/products/10168 Graphic LCD 84x48 - Nokia 5110]: power: the datasheet says 2.7 V to 3.3 V at 0.24 mA typical; but the [https://learn.sparkfun.com/tutorials/graphic-lcd-hookup-guide "Graphic LCD Hookup Guide" tutorial] says 2.7 to 3.3V at 7 mA (?) (when the 3 V at 100 mA white backlight LEDs are off) | + | ** [https://www.sparkfun.com/products/10168 Graphic LCD 84x48 - Nokia 5110]: power: the datasheet says 2.7 V to 3.3 V at 0.24 mA typical; but the [https://learn.sparkfun.com/tutorials/graphic-lcd-hookup-guide "Graphic LCD Hookup Guide" tutorial] says 2.7 to 3.3V at 7 mA (?) (when the 3 V at 100 mA white backlight LEDs are off) |
** [https://www.sparkfun.com/products/11676 Serial Miniature OLED Module - 1.5" (μOLED-128-G2-GFX)] : 128 x 128 resolution, 65K colors, 1.5". Power: 5 V at 60 mA typical when on, 0.1 mA when all pixels black (?). Includes microSD socket. | ** [https://www.sparkfun.com/products/11676 Serial Miniature OLED Module - 1.5" (μOLED-128-G2-GFX)] : 128 x 128 resolution, 65K colors, 1.5". Power: 5 V at 60 mA typical when on, 0.1 mA when all pixels black (?). Includes microSD socket. | ||
** [https://www.sparkfun.com/products/11377 Serial Miniature LCD Module - 1.44" (uLCD-144-G2 GFX)] : 128 x 128 resolution, 65K colors. Power: 5 V at 40 mA typical when on, 0.5 mA when all pixels black (?). Includes microSD socket. | ** [https://www.sparkfun.com/products/11377 Serial Miniature LCD Module - 1.44" (uLCD-144-G2 GFX)] : 128 x 128 resolution, 65K colors. Power: 5 V at 40 mA typical when on, 0.5 mA when all pixels black (?). Includes microSD socket. | ||
** [https://www.sparkfun.com/products/256 Basic 20x4 Character LCD - Black on Green 5V] : Power: 5 V at 1.5 mA typical (when the 4 V at 250 mA LED backlight is off) | ** [https://www.sparkfun.com/products/256 Basic 20x4 Character LCD - Black on Green 5V] : Power: 5 V at 1.5 mA typical (when the 4 V at 250 mA LED backlight is off) | ||
** [https://www.sparkfun.com/products/13192 SHARP Memory Display Breakout - Silver Monochrome (1.3", 96x96)] : Power: 12 uW (?) 2.7 V to 3.3 V updated at 1 Hz. Apparently several libraries: [https://github.com/olikraus/u8glib U8glib: A graphics library with support for many different monochrome displays]; [https://github.com/pabigot/bsp430/blob/next/src/boosterpack/sharp96/u8g_bsp430.c]; [https://github.com/adafruit/Adafruit_SHARP_Memory_Display]; ... | ** [https://www.sparkfun.com/products/13192 SHARP Memory Display Breakout - Silver Monochrome (1.3", 96x96)] : Power: 12 uW (?) 2.7 V to 3.3 V updated at 1 Hz. Apparently several libraries: [https://github.com/olikraus/u8glib U8glib: A graphics library with support for many different monochrome displays]; [https://github.com/pabigot/bsp430/blob/next/src/boosterpack/sharp96/u8g_bsp430.c]; [https://github.com/adafruit/Adafruit_SHARP_Memory_Display]; ... | ||
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* ... | * ... | ||
* ... ''Have you seen a display that would work on a wrist calculator? Please add it to the list here!'' ... | * ... ''Have you seen a display that would work on a wrist calculator? Please add it to the list here!'' ... | ||
