Electromagnetic Interference causing LCD to crash

I also notice that you have the cables for the led lighting running right besides the bread board 10v rail. As the system is using PWM with voltages between 40 and 100 volts this will lead to what they call capacitive coupling between them causing a ripple on the 10v rail of up to 100v. This also goes for all the other wires.

The wires you are referring to is the dimmed power cables to the LED lightning, which are operating at 9v. I think the voltage might be lower as I dim the light down. So then the high voltage is separated as much as possible inside that box.

Seperation is the first step, Shielding the second and filtering is the final thing you should attempt.

All the components inside the box are mounted on a metal plate (isolated between) which is connected to AC ground. Is this the kind of shielding you are describing?

Hi,
Are we looking down on the box, or is the box on a wall.
If the protoboard is vertical it will not be very reliable as all your components will be trying to pull out.

As stated before, usng protoboard for long term projects is not recomended.

Thank you for telling me about this issue. I had a feeling that this was not so good for long-term use, but I thought it was ok as long at the board was standing still. The box is wall-mounted so I will have to look for a better long term solution.