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This is flower shaped LED chaser using Arduino Nano and 132 LEDs. Each LED bar contain 11 LEDs, connected together in parallel, and used 100 ohm resistors for LEDs protection. Parts list: 1-Aluminum plate with 0.7mm thickness 2-Drill bit 5mm(for 5mm LEDs) 3-LEDs 5mm blue, white, red, green, yellow  4-Black color spray 5-100 ohm resistors 6-Connecting wire 7-Arduino Nano 8-Power supply 5v 500mA You can change the flashing speed by changing the number that written after "delay" in the programming code. void setup(){   pinMode(2, OUTPUT);   pinMode(3, OUTPUT);   pinMode(4, OUTPUT);   pinMode(5, OUTPUT);   pinMode(6, OUTPUT);   pinMode(7, OUTPUT);   pinMode(8, OUTPUT);   pinMode(9, OUTPUT);   pinMode(10, OUTPUT);   pinMode(11, OUTPUT);   pinMode(12, OUTPUT);   pinMode(13, OUTPUT); } void loop(){     digitalWrite(4, HIGH);   delay(100);   digitalWrite(4, LOW);   delay(100);   digitalWrite(4, HIGH);   delay(100);   digitalWrite(4, LOW);   delay(100);   digitalWrite(8, HIGH);   dela

                   N etworking is the one the most effective mode and medium of Intra communication Technique which is used to communicate the people connected into the Intranet. But chatting with your colleague is possible with using Arduino? Yeah. Of course possible. Today we are going to discuss about it. Hardware Required... Arduino mC.                                  x2 HC-05 BT module                         x2 Serial Communication cable    x2 Hookups                                            x8 PC (Laptop or Desktop)                x2 Required Hardware. Software Required... Arduino IDE     Download Here                         Arduino IDE is an Integrated Development software to edit, debug and run your Embedded C program. Download the latest version of the IDE from above link. Working...              I'm going to use the Technique of Master-Slave operation of HC-05 module. The master device is going to connect with slave device to share the data. Move on to

There are some arduino modules that can used without arduino board, such as motion sensor module, light sensor module, etc. Avoidance sensor module also can use without arduino board. here i used it for make a simple switch for AC or DC load. you can use it for kitchen cabinets light for example, so when you stay near each cabinet part the light above that part run, i think that is amazing idea for optimizing power consumption and i think there are not similar commercial in electric markets. The sensing distance range is between 2 to 30cm. Avoidance sensor almost is similar to ultrasonic sensor but with lower sensing distance range and unfortunately high sensitivity to sun ray, also it can't calculate the distance and just sense existing an object in the way so usually used in robots for inhibit collision with wall or other objects.