This tutorial shows you how to make a phone charger which uses any DC source (AAA/AA/SLA battery) as input and is efficient in terms of power utilization. We’ve been holding onto 7805 regulator IC from a very long time and hence a question may arise as to why we are not using the same this time. Well all these days we didn’t care about the efficiency since it was either a low current application or ones which didn’t run completely on battery but this time it is different. This time our aim is to create a device which runs on battery and needs to be utilizing the battery’s energy efficiently.
DIY- Emergency Phone Charger using a DC Motor
During power outages, and all the batteries around your home drain away, the only option left for you would be this. This tutorial shows you how to charge a phone using a 12V DC motor and a couple of other parts.A DC motor can also work as a DC generator and vice-versa since their construction and operating principle are similar. So I would be using a 12V DC geared motor as a generator since we need a power source to charge our device.
Insight – How Mobile Phone Charger works
Latest mobile chargers are kind of power supply units that use the Switched Mode Power Supply (SMPS) technology. To understand the working phenomenon of a mobile charger, we need to understand the concept of Power Supply Unit (PSU). PSU is a device that transfers electrical energy from one end to another by changing its fundamental characteristics according to the requirements. Example of a PSU is an application that converts AC mains voltage to regulated DC voltage. PSUs can be of two types depending on the mode of operation – Linier and Switching. In these switching mode chargers, energy transfer is done by continuously switching electrical components (inductor, capacitor, etc) on and off. We can control the output voltage/current by varying the duty cycle, frequency or the corresponding phase.