Hi All,

Description:
Please refer the attached circuit diagram, the 12 V supply driver 3 relay of 250mA and the 5V is connected to micro controller & 20x4 LCD.
Issue:
The circuit works fine if 2 relays connects but when the third relay connects, the LCD display scrambles. I believe the sudden high current drops the 5V voltage . Please let me know do i have to put another TIP2955 against 7805 Regulator.

Help is much appreciated


I didn't find the right solution from the internet.
References:
https://forum.allaboutcircuits.com/threads/12v-5v-voltage-regulator-with-high-cu
rrent.142254/

demo video