ATTiny84 weird shutdown issue

@killzone_kid, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project :wink: See About the Installation & Troubleshooting category.

I'm not familiar with your microcontroller. Does the micro have brownout detection? Maybe you have set the BOD settings incorrectly.

Can you provide a schematic?