HiLetgo 2004 20X4 LCD Display LCD Screen Serial with IIC I2C Adapter Yellow Green Color LCD for Arduino Raspberry Pi

I was skeptical that a yellow backlit LCD would be visually appealing, but the contrast between the yellow background and the black letters is the best I have seen of any other color combination. It is amazingly clear and bright. The unit I received has an I2C address of 0x27 just like the product description states. The LiquidCrystal_I2C and LiquidCrystal_PCF8574 libraries from GitHub both work equally well with this unit, so you can use either one. HOWEVER, both libraries turn the backlight off by default so having the backlight jumper on the I2C interface isnt enough, you must ALSO use lcd.setBacklight(1) in your program to activate the backlight.

price very good deliver fast come assembled

Worked as expected.

It works as expected. Pretty easy to read once you adjust the contrast. Rated at 4 stars because it comes with zero documentation. They do seem to be pretty standard so I was able to get it working using an example for Arduino online.

Great product and works as designed. One screen came with a loose connection on the contrast potentiometer. At first one of the screens would not display the text and after looking into it I could get the I2C address but it wouldnt display any text. The green back light was fine and after testing the contrast pot I found that it was soldered enough, so I added solder and it works great now. Good price!

Was a little skeptical having read some reviews regarding poor solder connections, especially as the pictured device in the product description clearly shows solder bridges on the I.C. so I inspected it very carefully before proceeding. Workmanship as good as other quality and expensive components. Everything worked as advertised. The LED jumper disables the back-light and the display contrast is very clear. I also ordered the 2 extra I2C boards from the same vendor (Hiletgo) and both tested perfectly. Same results on other devices from them.

Display works. Sometimes. It will go from being perfectly readable to blackboxes and gibberish simply by looking at the display for too long. Contrast potentiometer does not stay set somehow. Spend the extra $4 to get a similar display from a better seller.

I2C is the way to go to minimize the pin count used on your board. Love the contrast Black on Yellow display very bright and very easy to read, The Contrast control works great. Price point is about right for this product and Yes I will purchase more the next time I need more displays .

Shipped fast, next day in my case, was package in its own box making it very well protected. I was able to hook it up a have some examples running on it in minutes! This will be perfect for a Time. Temp, Pressure display project in my shop! The extra two lines this display provides may come in very handy for this!

It merely performs the expected functions that it should as marketed. It is a cost-effective solution which can be quickly attached to Arduino (I use custom 4-line ribbon to group and distribute SDA SCL and assure proper power inputs to the four-pin parallel-to-serial add-on soldered to the back of the 20 x 4 display. Its a snap to apply the LCD to an AT-mega.