Timeline for How to set 16x2 LCD I2C display backlight?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Jun 20, 2021 at 14:44 | comment | added | Majenko | If there is a resistor in the circuit between the PCF and the LCD then I wouldn't expect anything bad to happen. | |
| Jun 20, 2021 at 14:42 | comment | added | Coder9390 | In the sense that the backlight turns off and nothing blows up or heats up | |
| Jun 20, 2021 at 14:36 | vote | accept | Coder9390 | ||
| Jun 20, 2021 at 14:35 | comment | added | Coder9390 | No, I had my doubts but when I connect the 2 nothing happens | |
| Jun 20, 2021 at 14:34 | comment | added | Majenko |
Note that on my backpack, there is no connection between pins A and K to keep the backlight on but if I connect the two, then the backlight is turned off. -- Sounds like you're short circuiting the back light there.
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| Jun 20, 2021 at 14:32 | comment | added | Coder9390 | ....and then use PWM on the transistor right | |
| Jun 20, 2021 at 14:20 | comment | added | timemage | @Coder9390, if you want to do that, you should probably interpose a transistor. The backlight current is typically more than you'd want going through an Arduino I/O pin. | |
| Jun 20, 2021 at 14:14 | comment | added | Coder9390 | Can I just use analog write and connect that pin to Pin A on the lcd? | |
| Jun 20, 2021 at 14:08 | comment | added | Coder9390 | Ok, kinda disappointing, but good to know | |
| Jun 20, 2021 at 14:07 | history | answered | Majenko | CC BY-SA 4.0 |