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Topic: Warning to users of some vendors LCD keypad shields. (Read 312809 times) previous topic - next topic

bperrybap

I have read this link, checked in my IDE I have this hd44780LCD library installed with the library manager.
In the examples included with this library could not make out the sketch for testing the backlight control of the shield.
Which sketch is it?
See the wiki: https://github.com/duinoWitchery/hd44780/wiki/ioClass:-hd44780_pinIO

note: there is a link to the hd44780 library wiki in the included Documentation which can be found in the "Documentation" sketch.

--- bill

kssoin

See the wiki: https://github.com/duinoWitchery/hd44780/wiki/ioClass:-hd44780_pinIO

note: there is a link to the hd44780 library wiki in the included Documentation which can be found in the "Documentation" sketch.

--- bill
Thanks bill

RIN67630


gimmick-thane

#213
Dec 21, 2019, 08:09 am Last Edit: Dec 21, 2019, 08:13 am by gimmick-thane
Bill

Thanks for the lib and help. Nice way to figure if the lcd is bad, very ingenious ;)


Also, why not add a transistor (t1) as shown in the schematic? It is much simpler than having to unsolder the ldc board or redo all the traces. Think a 22-100k resistor (R4) in series with the base should work

V2 is the equivalent to d10

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