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I was trying to power a transimpedance amplifier built with an op-amp on a protoboard.

I only had a power supply that looked like the first image below (no COM, which I would have connected to GND of the op amp).

The answers I got for my initial question posted on this website were really good and perfectly explained what I was supposed to do. (I initially asked questions about different kinds of power supplies)

I made a mistake of connecting the mains earth of the power supply (circled in the first image below) to the + pin of the op-amp, where GND (COM of a power supply) was supposed to go. I understand why I was not supposed to do it. The mains earth is ill-defined since it is disconnected from both positive and negative voltage outputs of the power supply.

It seems I broke my op-amp when I connected the mains earth to + pin of the op-amp where GND (so COM) was supposed to go. I see that I was not supposed to do it. I am just curious

My question is how did I brake the breakage happened. op-amp by connecting the mains earth to the + pin of the op amp?

enter image description here enter image description here

I was trying to power a transimpedance amplifier built with an op-amp on a protoboard.

I only had a power supply that looked like the first image below (no COM, which I would have connected to GND of the op amp).

The answers I got for my initial question posted on this website were really good and perfectly explained what I was supposed to do. (I initially asked questions about different kinds of power supplies)

I made a mistake of connecting the mains earth of the power supply (circled in the first image below) to the + pin of the op-amp, where GND (COM of a power supply) was supposed to go. I understand why I was not supposed to do it. The mains earth is ill-defined since it is disconnected from both positive and negative voltage outputs of the power supply.

It seems I broke my op-amp when I connected the mains earth to + pin of the op-amp where GND (so COM) was supposed to go. I see that I was not supposed to do it. I am just curious how the breakage happened.

enter image description here enter image description here

I was trying to power a transimpedance amplifier built with an op-amp on a protoboard.

I only had a power supply that looked like the first image below (no COM, which I would have connected to GND of the op amp).

The answers I got for my initial question posted on this website were really good and perfectly explained what I was supposed to do. (I initially asked questions about different kinds of power supplies)

I made a mistake of connecting the mains earth of the power supply (circled in the first image below) to the + pin of the op-amp, where GND (COM of a power supply) was supposed to go. I understand why I was not supposed to do it. The mains earth is ill-defined since it is disconnected from both positive and negative voltage outputs of the power supply.

It seems I broke my op-amp when I connected the mains earth to + pin of the op-amp where GND (so COM) was supposed to go. I see that I was not supposed to do it.

My question is how did I brake the op-amp by connecting the mains earth to the + pin of the op amp?

enter image description here enter image description here

1
source | link

mains earth and op-amp ground

I was trying to power a transimpedance amplifier built with an op-amp on a protoboard.

I only had a power supply that looked like the first image below (no COM, which I would have connected to GND of the op amp).

The answers I got for my initial question posted on this website were really good and perfectly explained what I was supposed to do. (I initially asked questions about different kinds of power supplies)

I made a mistake of connecting the mains earth of the power supply (circled in the first image below) to the + pin of the op-amp, where GND (COM of a power supply) was supposed to go. I understand why I was not supposed to do it. The mains earth is ill-defined since it is disconnected from both positive and negative voltage outputs of the power supply.

It seems I broke my op-amp when I connected the mains earth to + pin of the op-amp where GND (so COM) was supposed to go. I see that I was not supposed to do it. I am just curious how the breakage happened.

enter image description here enter image description here