ESUMIC® LCD Module for Arduino UNO R3 MEGA2560 16 X 2, 1602 White on Blue
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- display 2-lines X 16-characters
- Operate with 5V DC
- Module dimension: 80mm x 36mm x 12mm
- Viewing area size: 64.5mm x 16mm
- LCD display module with blue blacklight
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This 1602 LCD Module Has a Wide Viewing Angle and High Contrast ,Built-in Industry Standard HD44780 Equivalent LCD Controller,Commonly Used In Copiers,FAX Machines,Laser Printers,Industrial Test Equipment ,Networking Equipment Such As Routers and Storage Devices
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I soldered on header pins and plugged it into a bread board, replacing another 4 line LCD screen. It worked great and exactly the same as the one I had bought years ago.
It has a nice brightness and blue glow.
Contrast is adjustable when pin 3 is wired up with a potentiometer.
Came with a clear piece of plastic over the screen to protect it in shipping.
I would buy again.
Full specs and details for these LCDs can be found with a Google for "20 x 4 line lcd datasheet"
When I first powered it up, I saw a glitch in the display (see photo). This is an analog mark, not a digital one (like stuck pixels). I decided to proceed anyway. After soldering on a 16-pin header and connecting it up to a Raspberry Pi, I could communicate with it perfectly. I could put it in 4-bit data bus mode, read/write the DDRAM and CGRAM and monitor the busy bit. That all seems great except that I cannot make the display turn on. No matter how I adjust the contrast (with a 10K potentiometer), I cannot even see a ghost of the underlying pixel array. None of the characters that I write to the display show up. Since I can read the characters back from the DDRAM, I know they were transferred correctly.
So I believe the interface between the pins and the controller (which is a Samsung KS0066U) is working. But I think the back-end (to the LCD driver and/or display) is broken.
Since it is a relatively inexpensive part ($12) and since I've also modified it from its original condition (by soldering on the header, which is mandatory), I'll just write it up to bad luck. Not worth the trouble to return or exchange.
I have no idea if my experience is any indication of the quality of this module in general, but for me, it was broken. Thus the one-star rating.
In the end, I like this display, comparable to others that I have bought without all of the extra "stuff" that is completely useless to me at this point.
Most recent customer reviews
Note that it does not come with header pins.