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No more BATTERIES, let's easily switch to CURRENT with this TECHNIQUE. In this video tutorial of easy electronic projects with MOTORS, experiments, homemade tools and much more!! let's see how we can pass our electronic devices from batteries to current, since in most cases the batteries or batteries run out in a very short time and are very expensive and sometimes they are difficult to get, in this case I am going to make the modification of 2 strips of Christmas led balls that work with 1.5v batteries in total 3v and we are going to make use of the mobile phone chargers that are no longer used, I have been recycling them for a long time and we have them of different voltages, with a small modification that I will explain in the video, we are going to easily adapt those mobile phone adapters for our battery-operated devices, the number of batteries does not matter, it can be 2 or 3 batteries or more, that is the least of it and we are going to use a resistor to be able to lower the voltage and adjust it to the voltage that we need to adapt each device, I will also explain how we can calculate the resistance with a mathematical formula and thus adjust more precisely the voltage of each device in question, if you like the video do not forget to leave your LIKE thanks