Arduino reset and lcd display weird number when running 12v water pump

[ibinzulk]

Hi guys.. I got a problem with my project 12v water pump (R385 diaphragm waterpump) with stackable arduino relay shield.. While water pump running It showing weird number at lcd display and sometime arduino going reset itself.. I already add ceramic capacitor and diode to motor but problem still persist.. Im using single power from adapter 12v3a to supply all my component.. Iam just loop the power for arduino and waterpump.. For arduino+lcd+rtc+relayshield iam using LM2596 stepdown converter..

Here the video

hhh

[paulpaulson]

@ibinzulk

I already add ceramic capacitor and diode to motor but problem still persist..

Add a freewheeling diode to the water pump.

[ibinzulk]

I think IN4007 diode (im using now) is freewheeling diode family..if not what type of diode that i need to use and how the connection.. Correct me if im wrong..