Recent content by itskinner

Ok so I need a 15 Farad capacitor to store 60 coulombs in order to suppler 4V and 2A over a 2 ohm resistance heating coil for 30 seconds. Do those things even exist, that aren't the size of a large mug? Iain

I understand how the capacitors work now, I already understood that AC can't charge a capacitor! So I have my circuit here, I can shake the bugger and get me a charged capacitor using the rectifying bridge. What I need it to do, and the reason I'm on here is for it to deliver 4V over a 2...

Ok so I went out and bought one of those shake to light torches with the induction coil and magnet and shenanigans. It's got a rectifying bridge built into it to charge the capacitor. It's, as far as I can tell, a 5.5V, 0.22F capacitor but its got 2 3v lithium cell batteries in the circuit as...

Hello all, I am new here. So you see where my lack of understanding comes from; my background is as a Mechanical Engineer and I'm currently in my masters year. I haven't touched electronics since A levels but I was hoping somebody could point me in the right direction. These forums tend to...