LCD screen stops displaying after DC motor starts I have 3 main components: LCD, thermal resistor, and a DC motor running a fan. The LCD displays the temperature reading from the thermal resistor and then after it hits a certain temperature the motor turns on.
A few seconds after the motor has been turned on the LCD will go blank (but still powered on). I tried connecting a 100uF electrolytic capacitor across between the logic supply pins on the LCD and a 0.47 µF ceramic between the motor terminals.
I did this because i'm assuming since the motor in operation (its commutator) produces voltage/ current "spikes" they can be coupled back through the common power supply. This could provide some immunity against them actually getting to the display driver and interfering with its operation.
What I did kind of helped, but I feel like I am missing something. Any suggestions?
(the link is to the picture of my circuit I quickly made online)