Difference between revisions of "Orders/Alibaba 122x32 LCD Displays"
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(→Backlight: Details about backlight LED current) |
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==== Backlight ==== | ==== Backlight ==== | ||
| − | The backlight is provided by an LED on each side of the display. The top-right and bottom-left pins are +3.3V, and the top-left and bottom-right pins are connected to ground. | + | The backlight is provided by an LED on each side of the display. The top-right and bottom-left pins are +3.3V, and the top-left and bottom-right pins are connected to ground. The datasheet is inconsistent, but suggests either 15mA or 40mA of current per LED. |
Revision as of 08:10, 29 October 2012
Organised by Sci.
The LCDs are here: http://eastrising.en.alibaba.com/product/520361167-212974175/LCD_Graphic_Display_122x32.html
I've been quoted $7.50USD (so about £4.62 each) plus about $35 (~£22) postage to the UK for the 4 I'm after. Price might go down a bit if people are interested. I don't know the price-break quantities though.
Revised postage will be $60, plus $9 bank fees. Across 22 items that's a $3.14 (£1.94) fee per unit. Totals per interested party at the bottom.
Lead time is currently 1-2weeks while waiting for new lot of red backlights. Delivery time should be about 5 days from then. Will be notified.
Interested
Red-on-black (ERM12232DNR-1):
- Sci x4
- DMI x2
- Mark Steward x4
- tgreer x1
- Jon Fautley (Filbert) x 2
Total: 13
Other items:
- DMI, x3 dark-blue-on-white (ERM12232GS-1) $6.40ea.
- Kimball Johnson, x2 dark-blue-on-white (ERM12232GS-1), x1 ERC24064SBS-1 (white on blue) Drrk 22:18, 2 May 2012 (UTC)
- tgreer x1 (ERM12232GS-1) $6.40ea.
- asc x2 dark-blue-on-white (ERM12232GS-1) $6.40ea.
Amounts payable
Sci (4x ERM12232DNR-1); $42.56 (£26.30)PAID - May 4th, 2012DMI (2x ERM12232DNR-1, 3x ERM12232GS-1); $21.28 + $28.62 = $49.90 (£30.83)PAID - May 4th, 2012Mark Steward (4x ERM12232DNR-1); $42.56 (£26.30)PAID - May 9th, 2012tgreer (1x ERM12232DNR-1, 1x ERM12232GS-1); $10.64 + $9.54 = $20.18 (£12.46)PAID - May 5th, 2012Jon Fautley (Filbert) (2x ERM12232DNR-1); $21.28 (£13.14)PAID - May 4th, 2012Kimball Johnson (2x ERM12232GS-1, 1x ERC24064SBS-1) $19.08 + $17.14 = $36.22 (£22.37)PAID - May 5th, 2012asc (2x ERM12232GS-1) $19.08 (£11.78)PAID - May 8th, 2012
Total: $231.78 (within $0.08 of invoice total) (£143.14)
Order has been placed.
Order has arrived at Sci's home address. Will attempt to deliver them to individuals member-boxes at the weekend unless otherwise instructed.
Usage
The controller appears to be a SED1520 module. An AVR library is here: http://en.radzio.dxp.pl/sed1520/
Pinout
| Pin | Name | Description |
|---|---|---|
| 1 | VSS | Power (+5V) |
| 2 | VDD | Ground (+0V) |
| 3 | V5 | Contrast adjustment. Connect a rheostat with VSS |
| 4 | A0 | Command (L) or data (H) register selection input |
| 5 | CS1 | Left side (61 columns) select input, low active |
| 6 | CS2 | Right side (61 columns) select input, low active |
| 7 | CL | External clock signal |
| 8 | E-RD | Enable signal or read enable clock |
| 9 | R/W_W/R | Read/write or write enable clock |
| 10 | D0 | 8-bit bi-directional data bus |
| 11 | D1 | |
| 12 | D2 | |
| 13 | D3 | |
| 14 | D4 | |
| 15 | D5 | |
| 16 | D6 | |
| 17 | D7 | |
| 18 | RES | Hardware reset and interface type selection: High = 68-family MPU, low = 80-family MPU |
| 19 | NC | No connection |
| 20 | NC | No connection |
Backlight
The backlight is provided by an LED on each side of the display. The top-right and bottom-left pins are +3.3V, and the top-left and bottom-right pins are connected to ground. The datasheet is inconsistent, but suggests either 15mA or 40mA of current per LED.