I proudly did once a demonstration about my latest tool purchase, a brand new Rigol DP832 power source, and how great it is, and how it can serve as a voltage source, or as a current source, upon wish.
And to prove my point, I set the current to 20mA and confidently hooked up a LED to the wires.
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif)
The LED flashed then instantly died with a violent pop sound, I jumped back, and my friend burst into laughter.
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
Those 20mA were enough to charge a few thousands uF of output capacitors up to 32V, then all the energy rushed into the LED, limited only by the ESR and the wires. In DP832, the output filtering capacitors are located at the end side, in direct contact with the output terminals.
![Grin ;D](https://www.eevblog.com/forum/Smileys/default/grin.gif)
Regarding the melted bonding wires, they are terminated in intriguingly round spheres of metal, and also there is a segment attached to each sphere, segment that looks like it was melted too but only at its surface, and somehow kept its initial cylindrical shape and its initial diameter, then the rest of the wire suddenly looks like brand new.
How is that possible?