Can anyone tell me (at a quick glance) what's about to happen here~

3D Printing
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Can anyone tell me (at a quick glance) what’s about to happen here~

c857394defa484a45f237edef28880d3.jpeg
c857394defa484a45f237edef28880d3.jpeg3120×4160 3.82 MB

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Circuit blow up due to short circuit.

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And now with the sarcastic answer out of the way, care to engage in a discussion?

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I was going to guess you’re going to get a lot of cross current between the two switchers. It looks like you are trying to wire them up in parallel, which, if they aren’t designed for that, you will find that it doesn’t work.

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I will post the schematic as soon as I’m done.
How can I add more pictures to a post?
Guessing not possible via the app?

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What are you trying to accomplish here?

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This: https://avnet.ws/images/guides/power_supply/its_alive.jpg
With this: https://avnet.ws/images/guides/power_supply/octoprint.png

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Really need that many lights? Most of the 12v LED lights do not draw a lot of current.

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@Keith_Applegarth ​ I was using the lights to indicate I was getting power, come on…

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Ok… so what is the other power supply for?

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If I didn’t know better, I’d say you set up an oscillator off the primary and are feeding back somehow…Tesla Coil primary?

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@Keith_Applegarth in the other picture it says “lights on/off” “printer on/off”. btw, easier would be just to connect power outlets directly to relays (they hold 10Amps for 220v in Europe) and then you can plug in the outlets whatever you need. No need to change software in case you just want to plug in the coffee machine.

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Gotcha!

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OK, now that I have time to explain (had a VA appoiment to attend to), the small (5v) power supply, powers a pi and the relays - the pi supplies 3.3v to the octocouplers (which turn on the relays via gpio and Wiring) and the main power supply is switched on with one of the relays, while a small chain of LEDs turn on when needed with the other.

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@Kaspars_P I was thinking that as well, along with just using the relays to turn off the circuit instead - but decided against it just due to my preference.
I have a RAMBo 1.2d, the electronics cannot be powered via USB, so I looked for a solution to turn the printer on/off - I already had a Raspberry Pi 2 running OctoPrint and this is what I came up with.

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Sparks? I don’t really know, but I bet sparks could happen.

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New