TOAST BURN MARKS DRAWING SERIES

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I’m guessing that the blade is equivalent to a 16″ space heater core (which gets red hot), and there are typically two of these in a heater, so it seems likely that a 2-blade system is feasible. It’s easy to measure the power drawn by one blade, then you can see how many blades will fit into 1500 watts.

TOAST BURN MARKS DRAWING SERIES

If you use two blades in parallel you’ll get half the resistance and twice the current, but 4x the power per the formula above, so you’ll want to reduce the voltage by using fewer turns.īlades in series is twice the resistance and half the current, but 1/4 the power so you’ll want to increase the number of turns. That said, the blades of the saw have a specific resistance and R factor (resistance to heat energy being transferred to the bread) which is easy to determine using a DVM. The amount of power you draw, I^2 * R, or V*I, has to be less than the MOT power rating. This is low enough and safe enough that you can just put a DVM on the outputs and measure voltage or current. The hacker gets to choose the voltage by using more or fewer windings: MOT primaries are wound with about 1 volt per turn, so 2 turns gives you about 2 volts. That’s the maximum that the transformer *can* supply, but the amount that it *does* supply is determined by the voltage and the resistance. Anything above this and you risk popping a circuit breaker and overheating your home wiring. MOT’s are rated to the capacity of the oven, which can go as high as 1500 watts. Be careful with your shaver, and use it responsibly.įor this application you need to look at the power. Do these people ever do anything of note? I really don’t understand the atmosphere of fear shown by some posters. People use circular saws and even sometimes (*gasp*) chainsaws! Is a hot knife that much more dangerous? Is it because the blade is hot? Is this somehow more dangerous than an electric carving knife? Or a soldering gun? Total energy (1/2*C*V^2) is on the order of a joule – not much of a spark there.) Still… is this really scary? Capacitors are in a lot of things, and we’re supposed to be hackers. It takes a few seconds to discharge, but it takes you much, *much* longer to take the oven apart to get at the capacitor.

Most MOT capacitors have a built-in resistor. There’s no chance of electric shock from the blade. The voltage across the blade is between 2 and 3 volts (MOT primaries are wired at around 1 volt per turn) and it’s galvanically isolated from the mains. I really don’t get why timid people post here. Posted in Tool Hacks Tagged colin furze, hot bread knife, hot knife, lightsaber knife, toasting bread knife Post navigation The build is pretty simple, but as always, very entertaining to see how he’s made it. Using a re-wrapped microwave transformer - much like home-made spot welder rigs - is pumping a ton of amps at low voltage through a hacksaw blade, making it red hot and ready to toast bread. In fact, its more of a light-saw-ber, which, pronounced with the right accent could be easily mistaken for the real deal. Unfortunately, it’s not exactly a light saber. Submitted as an idea by one of his subscribers to his new series called Furze’s Invention Show, he took it upon himself to make the long revered lightsaber bread knife. We were waiting for this day. Leave it to to make something out of the Hitchhiker’s Guide to the Galaxy a reality. Who needs a toaster when you can cut your bread… and toast it at the same time! just made a household appliance obsolete.

Toast burn marks drawing