IC ULN2003A PDF

Its pin division on the basis of functions associated with them is shown in above figure. Further description will be given in this tutorial later. In short the pins can be divided into four different categories i. These pins along with their positions are shown below. Internal Circuit Diagram Internal circuit diagram of ULN having different resistors and diodes is shown in the figure below.

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Its pin division on the basis of functions associated with them is shown in above figure. Further description will be given in this tutorial later. In short the pins can be divided into four different categories i. These pins along with their positions are shown below. Internal Circuit Diagram Internal circuit diagram of ULN having different resistors and diodes is shown in the figure below.

The logic diagram for ULN is shown in the figure below. A few of which are given below. High output voltage of around 50V. Relay driver applications. Output clamp diodes. Compatible input with popular logic types. Some of the key features are also given in the table below for the better understanding about the working conditions of ULN Applications The relay circuit driver ULN has a wide range of applications in real life.

Some of the major applications associated with ULN are given below. Logic buffers. Relay drivers for driving different loads. Lamp drivers. LED display drivers display devices. Motor stepper and DC brushed motor drivers. The screenshot of the simulation is shown in the figure below. The running form of the above simulation is shown in the figure below. You can download the Proteus simulation here by clicking on the button below.

Just download. I hope yo u really enjoyed this tutorial. If you face any sort of problem regarding any thing, you can ask me anytime in comments without even feeling any kind of hesitation. I will try my level to entertain you and to solve your issues in a better way, if possible.

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Used as test pin or Voltage suppresser pin optional to use 10 to 16 Output 1 to Output 7 Respective outputs of seven input pins. So if you have anything that anything more than 5V 80mA to work, then this IC would be the right choice for you. It has seven Darlington Pairs inside, where each can drive loads up to 50V and mA. Adding to that we can a ground and Common pin. The ground pin, as usual is grounded and the usage of Common pin is optional. It might be surprising to note that this IC does not have any Vcc power pin; this is because the power required for the transistors to work will be drawn from the input pin itself. In the circuit consider the LED to be the loads and the logic pins blue colour as the pins connected to the Digital circuit or Microcontroller like Arduino.

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