More ideas from Poul
Battery Desulfator - Homemade battery desulfator constructed from magnets, hard drive platters, diodes, a transistor, and a resistor.

Battery Desulfator - Homemade battery desulfator constructed from magnets, hard drive platters, diodes, a transistor, and a resistor.

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This project is a great place to start for the new metal lathe owner, as most of the project requires use of the lathe. A mill is recommended (to cut the slot), but not required (the slot could be drilled and filed by hand).

Radius Turning Tool by Iliketobuild -- In the process of building a boat I ran into a problem which required the fabrication of a new tool. The rub rails for the boat are schedule 40 aluminum pipe 2 1/2" in diameter. They require significant bending along a radius of approximately 14'. I tried numerous ways to bend the pipe without a roller and wound up kinking the pipe every time. After consulting some commercial boat builders the general consensus was that a ring roller was needed…

Radius Turning Tool by Iliketobuild - In the process of building a boat I ran into a problem which required the fabrication of a new tool. The rub rails for the boat are schedule 40 aluminum pipe 2 in diameter. They require significant bending along a

Isolating circuits from your arduino with optocouplers

A Optocoupler also called a photocoupler, optical isolator or opto-isolator is a small chip that transfers signals between two isolated circuits using light.