Normal Open Switches

Normal Open Switches  Normal – Open switches is the name given to the switches we are very much used to. The switches that turn on when we press and goes off when we release. These switches are called Normal-Open because in their normal...


Normal Close Switches

Normal-Close basically means in the normal state of the switch i.e non-pressed state, the switch is a closed circuit.The circuit  breaks when the switch is pressed. Assuming we connect a normally closed switch to an LED the way we usually...


Working with Keyboards

Key Arrangement  There is a lot of material to cover so I will jump straight to the point. Here are some key points on working with keyboards: Keys on a keyboard are organized in a matrix of rows and columns The microcontroller accesses both...

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