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GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 11:26
mvahoney the codewitch2-Oct-20 11:26 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
CodeWraith2-Oct-20 12:10
MemberCodeWraith2-Oct-20 12:10 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 12:39
mvahoney the codewitch2-Oct-20 12:39 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
CodeWraith2-Oct-20 14:16
MemberCodeWraith2-Oct-20 14:16 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 15:34
mvahoney the codewitch2-Oct-20 15:34 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
CodeWraith2-Oct-20 22:42
MemberCodeWraith2-Oct-20 22:42 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch3-Oct-20 1:29
mvahoney the codewitch3-Oct-20 1:29 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
Luc Pattyn2-Oct-20 9:33
sitebuilderLuc Pattyn2-Oct-20 9:33 
I don't now what specific device you're talking about, as you only specified "16 pin"; some identification could have been useful, or even a link to the thing you bought.

However, most low-end LCD displays include a control chip that is either a Hitachi HD44780 or some derivative thereof. It has been launched over 30 years ago, it got its own Wiki page here[^] and you can find its complete datasheet everywhere[^].

I used it a couple of times, but that was long ago (using 8-bit microcontroller and assembly code); I can't remember but I would expect the backlight to be working as soon as you apply 5V to the appropriate pins with a double caveat:

My best guess is you already killed the backlight, either by applying a reverse voltage, or by not including a series resistor; some if not all such LCD displays need a resistor in pin 15, and yes there are Youtube-quality instructions that don't show that. But this one does.[^]

Anyway the best way to test is by properly connecting everything up, and sending the appropriate commands and data. A library is not essential, you could perform each of the steps required using simple instructions, even when the backlight isn't working (use incident light at an angle of some 45 degrees). It is all a matter of sending some bytes to some addresses (which is true for all software of course).

Using the Arduino "LiquidCrystal" library can make it a little easier: Example (warning: the essential resistor is lacking here!)[^].

Smile | :)

PS: You can't just try and retry until it works, your hardware deteriorates when maltreated so you better get it mostly right from the start. It ain't software, it is called hardware for a reason.
Luc Pattyn [My Articles]
If you can't find it on YouTube try TikTok...


modified 2-Oct-20 15:39pm.

GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 10:44
mvahoney the codewitch2-Oct-20 10:44 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
Luc Pattyn2-Oct-20 11:08
sitebuilderLuc Pattyn2-Oct-20 11:08 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 11:35
mvahoney the codewitch2-Oct-20 11:35 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
Luc Pattyn2-Oct-20 12:08
sitebuilderLuc Pattyn2-Oct-20 12:08 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 12:41
mvahoney the codewitch2-Oct-20 12:41 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
David Crow2-Oct-20 10:08
MemberDavid Crow2-Oct-20 10:08 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 10:40
mvahoney the codewitch2-Oct-20 10:40 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
Robotek232-Oct-20 11:10
MemberRobotek232-Oct-20 11:10 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch2-Oct-20 11:34
mvahoney the codewitch2-Oct-20 11:34 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
_WinBase_4-Oct-20 22:37
Member_WinBase_4-Oct-20 22:37 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
Member 148590765-Oct-20 2:54
MemberMember 148590765-Oct-20 2:54 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
Matt McGuire5-Oct-20 5:07
professionalMatt McGuire5-Oct-20 5:07 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
Peter Shaw6-Oct-20 9:41
professionalPeter Shaw6-Oct-20 9:41 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
Chad3F6-Oct-20 13:08
MemberChad3F6-Oct-20 13:08 
AnswerRe: So my little arduino clone is fun but I was wondering something Pin
Luc Pattyn9-Nov-20 6:08
sitebuilderLuc Pattyn9-Nov-20 6:08 
GeneralRe: So my little arduino clone is fun but I was wondering something Pin
honey the codewitch9-Nov-20 6:11
mvahoney the codewitch9-Nov-20 6:11 
GeneralHas Win 10 Task Mangler changed... Pin
glennPattonContracting22-Oct-20 4:41
professionalglennPattonContracting22-Oct-20 4:41 

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