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16 X 2 LCD W/ KEYPAD FOR ARDUINO

CAT # ST-1113 (1 Review) 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 (1 Review)

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Modification needed before use

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

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