I am up to the next part in my induction annealer control circuit project.
I have run into trouble.
I wired up the circuit (Drawing attached. Sorry about the drawing. Free online circuit drawings don’t allow some components, so I have drawn them as text boxes, hope that’s ok).
When I plugged it in, Capacitor C1 blew up within 1 second.
The whole electrical process is meant to go as follows:
1 - 36V DC from the meanwell supply is feed to the relay contacts, to run the induction circuit when called by the relay
2 - The LM2575T Adj drops the voltage from 36V to 12V, so I can run the 12V relay coil
3 - The LM317T Adj drops the 12V power to 5V so I can run the arduino and other control components (Momentary switch, Time setting pot, LED, and MosFet which switches the 12v relay)
4 - The LED lights up and shows when the is power being supplied to the MosFet
The application for this circuit is basically a timer, controlled by arduino (and code).
When the momentary switch is pushed, 5V power is feed to the MosFet gate.
The circuit closes the 12v relay for a period of time.
This period of time is set by the timer set pot (up to 10 seconds, as an input into the arduino).
This allows the induction circuit to be on for that period of time.
Once the timer runs out, the 5V feed is dropped from the MosFet and the relay turns off, turning off the induction circuit.
I am very new at this.
This circuit is kind of a bit of a frankencircuit, as I grabbed all the necessary circuits I needed and put them all together hoping it would work.
It probably has some heaps of parasitic capacitance, or stray inductance or the like.
I just want to know why C1 popped (as it is a requirement for the LM2575 circuit), and how to fix it.
Thanks in advance guys.