Pulling Latch pin LOW on the shift registers results in Atmega 328 controller resetting.
Several points: - I am using superbright LEDs 3.5v with no resistors. The LEDs produce a really bright light without being damaged. The brightness of the lights are a part of the project. - The base controller has been wired according to this practice (excluding capacitors) - There are 2 serially set up shift registers driving 16 leds. The issue occurs when more than 10 LEDs are enabled by the shift registers when the latch pin is pulled low. - The circuit is powered by a 5v 1A supply.
My guess is the momentary voltage spike is what is causing the issue. I have no way to troubleshoot it though.