kris777 Posted April 9, 2017 Posted April 9, 2017 Is it possible to turn off / on the voltage (5V) GPIO from the command line ? .... So turn off eg 16x2 LCD power ....Is it possible only physically eg disconnecting the cable ( 2 , 4 - GPIO)
jernej Posted April 9, 2017 Posted April 9, 2017 No, it is directly connected to power supply line. Which display do you have exactly? It is hard to suggest alternatives without knowing exact pinout.
gungsukma Posted April 10, 2017 Posted April 10, 2017 You can power on/off the LED of the LCD using digital pins, not the power pins. May need resistor.
nopnop2002 Posted April 12, 2017 Posted April 12, 2017 On 2017/4/9 at 8:33 PM, kris777 said: Is it possible to turn off / on the voltage (5V) GPIO from the command line ? .... So turn off eg 16x2 LCD power ....Is it possible only physically eg disconnecting the cable ( 2 , 4 - GPIO) When using the switch circuit, it's possible. The switch circuit is possible by the photo switch or a transistor. When the switch does a blue line, a backlight of LCD turns on /OFF. 1
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