I have the following problem: I am running an Arduino Nano together with a DS180B20 temperature sensor and a MAX7219 7-segment LCD over the same 12V DC power supply as a small 12V DC motor (motor rated at 0.7 A maximum). The DC motor is directly connected to the power supply. The 12V DC power supply has a maximum rated output of 3A.
After 30 seconds running fine the DC motor causes the DS180B20 temperature sensor and the MAX7219 7-segment LCD to crash / stop working correctly. I assume this is due to some motor noise. I did some research on the forum how to eliminate motor noise and tried the following:
- 0.1 uF ceramic capacitor between + and - of the DC motor
- 1000 uF buffer capacitor between + and - of the power supply
Sadly, this did not fix my aforementioned problem. Do you have suggestions how to fix this?
Thank you very much.