How to make an electric magnet with the nail

Hi everybody! Today I’d like to tell you how to make a simple electric magnet. May be somebody already know that, or studied at physics or crafts lessons. Well, let’s start. I’m going to show it for those who do not know it yet. We need a copper wire, an electrical tape, AA battery, a

How to make a spot (contact) welding

Hi my dear friends! In today’s video I’m going to show you a great idea of making a simple contact welding device, it’s often called a spot welding. In order to make such a simple welding device we need an accumulator. I’m going to use an accumulator for 12 Volt and 60 A. We also

How to make a sound intensifier

Hi my dear friends. Many of you asked me to show how to make a mini portable speaker for tablet, laptop or cell-phone. So in today’s video I’ll show you ho to make the simplest sound intensifier. It’s the simplest one, because it’s up to everyone to make it, even to a schoolboy. Its scheme


How to make a mini-pump / water-circulating pump

Hello my dear friends! Roman is here with you as usual. Today I’d like to show you you how to make a water pump, or as many people call it – a water-circulating pump. First, we need one plastic bottle, a small motor – I took it from the DVD- drive, and it has such


How to make fire from AA battery

Hi everybody! Today I’d like to tell you how to get fire from AA battery. We need AA battery, scissors, a piece of cotton, I’ve got unrefined cotton, and a foil. It should consist of two parts: paper and foil. You may take such foil from cigarettes or chewing gum plates pack, wrapped in half