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16 X 2 LCD W/ KEYPAD FOR ARDUINO

CAT # ST-1113 4 out of 5 stars(3 Reviews) Write a Review

$ 5.95
$5.95 each
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Product Description
16x2 LCD keypad shield developed for Arduino compatible boards provides a user-friendly interface that allows user input and menu selection for custom applications. Features a 1602 white character LCD with blue LED backlight and 4-bit Arduino LCD library. Character size: 2.95 x 4.35mm. Keypad consists of 6 keys: select, left, up, down, right and reset. Potentiometer for dimmable backlighting. LED indicator. Operates on 5Vdc. Overall dimensions 80mm x 58mm x 13mm.
Spec sheet available in PDF format.
WARNING: May cause cancer or reproductive harm.
California Prop. 65
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Customer Reviews 4 out of 5 stars(3 Reviews)

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Modification needed before use 3 out of 5 stars

Reviewer: from Evansville, Indiana

I ordered two of these for some projects where I need a display and some simple inputs.

I opened one and tried it with the sample LCD code in the Arduino IDE. Backlight came on and it appeared to be working. I couldn't see any text though. So I adjusted the contrast trimmer pot, which I thought was freely spinning (it wasn't), but that led me to a post about some faulty designs on this type of 16x2 LCD shield.

Someone wrote a sketch to test if the backlight circuit was a faulty design -- and these shields fail that test. I had to desolder the LCD board from the shield and then cut a trace between Pin 10 and the transistor under the LCD (and add a 510-ohm to reconnect the pin to the transistor).

Without this modification, you can burn out pin 10 on the Arduino, if the pin is set a certain way, as the transistor will pull too much current from the pin in certain states. Post to explain the issue:

https://forum.arduino.cc/index.php?topic=96747.0

14 of 15 people found this review helpful. Do you? Yes No

Got it working - contrast pot 4 out of 5 stars

Reviewer: from NH, USA

I got these intending to use with a Raspberry Pi for a simple thermostat project. I thought these would be great, since it has both the LCD and built in buttons!

TLDR; The blue contrast potentiometer in the corner was set so low the text was invisible. It took many rotations in the clockwise direction before I saw any text appear.

I had some trouble at first, as I connected everything up and didn't see any message displayed. Backlight worked, but no message. I checked by connections, disconnected and reconnected everything, double-checked my code, and scratched my head for a few days.

Since it was designed for an Arduino and there's example code for that, I tried plugging it into one I had around. Even that setup didn't show any text. I eventually tried what the other reviewer suggested and installed a diode on the board, thinking that sounded plausible, and it STILL didn't work. That led me to start messing with the contrast pot, and lo and behold, after turning it a bunch I start to see text! The blue contrast potentiometer in the corner was set so low the text was invisible. It took many rotations in the clockwise direction before I saw any text appear.

I can't say I've used these weird blocky potentiometers before, so maybe that's a common thing one might expect to adjust before seeing any output. A little warning would have reduced my frustration, so that's why I'm leaving this note here. Hope it helps someone else!

Beyond that issue, the display is pretty great. It's a nice condensed package and should make for a great interface for projects.

2 of 2 people found this review helpful. Do you? Yes No  Certified buyer

Running several units 24/7/365 for 2 years. 5 out of 5 stars

Reviewer: from Indiana

No problems. No circuitry modifications. What I could really use is a bezel kit.

1 of 1 people found this review helpful. Do you? Yes No  Certified buyer


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