Some small devices and gadgets become so homogenous in our lives that we forget their importance is indispensible to us. One such electronic accessory is a multi-pin plug adapter. Acting as a single solution to connect multiple gadgets to a single power port, this small electrical equipment can create a big problem when absent.   Although multi pin adapter is a common accessory, a multi pin plug adapter, not many of the users would be aware that what is on the inside of this adapter. Is it a mesh of wires connecting to every port making a complex internal structure? How are the different connections protected from internal short circuiting?  This insight will explore the details of the internal structures and their features of a 3-pin plug adaptor. 

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. 

In today’s world most of the electronic appliances needs DC voltages from 3-12volts for operation. An adaptor is a device which is used to convert high AC voltages to low DC voltage. Adaptors come in various shapes, sizes & configuration depending on the use. In some cases adaptors are used to provide power to electronic appliances like video games, modems etc and in some cases they are used to charge the primary battery of the electronic device and also act as alternate power source like mobile chargers, laptop chargers, cell chargers etc. A typical adaptor is shown in the figure below.