Might want to check that formula, no?
Be my guest. You can start here:
https://en.wikipedia.org/wiki/LC_circuit
Further discussion unrelated to the thread topic should probably be taken to PMs.
Why do you want to know what the current is?
How much current do you suppose is flowing in a 308 case neck?
I use no external volt/ammeter.
The measurements are taken by the microcontroller itself via a AD converter, and displayed on the screen.
As my annealer logs an displays the data while annealing, i tried a 300 win mag case to melting point.
this is the result:
X axis -> 1/10 sec
red -> drawn current
blue -> coil temperature
orange -> voltage
A clear maximum at melting point.
So far testing the annealer has worked out great just working through one issue that i am not sure on and maybe someone can provide any insite. No matter where in the coil I put the case with tempilaq 750 the same results happen just times are either longer or slower. So when i start the heating cycle and you can see the tempilaq disappearing from the top of the case mouth downward to the shoulder which i believe is normal. My concern is that if i run it so that you see annealing marks maybe 1/4" below the shoulder (most pics i see on the net) the case mouth heats up and glows red which i believe is over the 750 degrees and maybe over annealing it. what i have done to not heat up the case is if i turn off the lights and run the cycle till it just barely turns red then reduce the time by 1/2-1 sec the annealing seems to only reach the shoulder or 1/16-1/8" below the shoulder. Is this ok or something else i should be looking at? i have tried this mainly on Military LC, Herters and Prvi brass.
also here is my Arduino code as well as the Nextion LCD firmware/Design file.
thanks
James
Once the Curie Temp is reached, current drops.
I think the most important thing when going automated is to put in a little bit of a time delay and to build in ways to cool the components. I think the components that get the hottest and induce heat in other components are the filter Inductor coils. The PCB esp the connections around the standoffs and then the capacitors. A fair bit has been discussed about cooling these components. With the reduce currents due to the Ferrite less heat is generated.