EK Technologies

Star delta starting One direction of rotation Power diagram Power diagram Star delta starting one direction of rotation  Control circuit Control circuit star delta starting one Direction of rotation Forward and Reverse rotation Power diagram Power diagram star delta starting forward and reversed rotation Control diagram Star delta starting control diagram for forward and reversed rotation Related and Recommended: Necessity of DC motor starters Working of DC motor

Connection of a two way (double) lighting system A two way lighting system is a system which can control a lighting point from two positions. In the connection of this system, two 2-way switches are required to control the lighting point from the two positions. Let’s now look at how the terminals of the 2 way switch looks like and how it is used.  It has 3 terminals (COM, L1, L2) see the figure below. One switch at position 1 and the other at position 2. Two 2 switch showing it's terminal Connection Now let’s look at the connection. From the above diagram, connect the COM of Switch 1 to the live, then L1 and L2 of Switch 1 connected to L1 and L2 of Switch 2. Then connect the COM of switch 2 to one terminal of the lamp and the other terminal of the lamp to the neutral and you are done with the connection. Connection of a 2 way lighting system Now let’s see how it operates to put on the lamp.    Pressing any of the switch puts ON the lamp...

L293D The L293D is a 16 pin motor driver integrated circuit used to drive motors. It consists of two H-bridge embedded in a single chip. The L293D is capable of running two DC motors independently and also able to reverse or change the direction of rotation of the motor. The IC can supply a motor with operating voltage of up to 36V with a current . L293D motor driver Pin1 ( Enable 1,2):  Enables input 1 and input 2. So when high, left part of the IC is enabled and when low left part is disabled Pin2 ( Input 1) :  when high, current flows through output 1 Pin3 ( Output 1):  Connected to one terminal of the motor, M1 Pin4 (Ground):  Connect to the ground Pin5 (Ground):  Connect to the ground Pin6 ( Output 2):  Connected to the other terminal of the motor, M1 Pin7 ( Input 2):  When high, current flows through output 2 Pin8 ( Vcc2 (Vs)):  Voltage to be supplied to the motor Pin9 ( Ena...

Why transformers work only with AC and not with DC The first thing to know here is the meaning of AC and DC. AC means Alternating Current. That is the current changes direction DC means Direct Current. That is unidirectional current or single direction. With the understanding of this meanings, the main reason why a transformer works only with AC is because, the AC causes a changing magnetic field and hence a flux which in turn links the secondary winding and hence an induced emf and current can flow. Meanwhile DC, does not cause a changing magnetic field hence no induction into the secondary winding. So this is a phenomenon of Faraday's law of electromagnetic induction

Wiring a One way switch in a lighting system A one way switch is a switch which is used to control a lighting point from a single position. A one way switch can be of one gang, two gang or three gang. See the image below. A one way switch has two terminals namely : ( COM and L1 ) or (  L1 and L2 ) see the image below The switching mechanism is such that when the switch is on, COM and L1 is connected. And when OFF, there is no connection between them. See below Wiring of a one way switch Connect one of the terminal to the live and the other terminal to lamp. By convention, connect the live (phase) to the COM and L1 to the lamp. Then connect the other terminal of the lamp to the neutral. See the connection below one way switch wiring Here, the switch (S1) is in the OFF position  and the LAMP (H1) is OFF. one way lighting, showing Lamp ON Here, the switch (S1) is in the ON position  and the LAMP (H1) is ON. Bravo hope you can now connect ...