Interfacing with 8051: LED, LED pattern display

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1. Unit-V-A Off-Chip Peripheral Interfacing And Programming Interfacing with 8051: LED, LED pattern display, traffic light display, Switches and Matrix ,Keyboard, LCD, ADC 0808 with Analog Sensor, DAC and their applications

2. Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. It is easy to use even for beginners. Hugely popular, you will find numerous tutorials and projects to help you get started and build your favourite electronics project.