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Many thing in our daily need that can be easily by implement a simple applied technology. So our life become easy and comfort. We can make anything work automatic, or work without our intervention so if we forget to run it, or to turn off it, they will be done by their shelf.

 

By a simple applied technology, such as electronics, we can solve many simple problem as mentioned above. With the small dimension of electronic component and small power too, we can realize our need, such as automatic lamp, remote controller, water tank level controller.

 

Beside all that mention above, we can make many device that valuable to our need, such as decorative lamp, amplifier, detector etc. The simple applied electronic circuits are divided in to two groups, analog and digital circuitry. 

 

Analog electronic circuits are those in which signals may vary continuously with time to correspond to the information being represented. Electronic equipment like voltage amplifiers, power amplifiers, tuning circuits, radios, and televisions are largely analog (with the exception of their control sections, which may be digital, especially in modern units).

 

In digital electronic circuits, electric signals take on discrete values, which are not dependent upon time, to represent logical and numeric values. These values represent the information that is being processed. The transistor is one of the primary components used in discrete circuits, and combinations of these can be used to create logic gates. These logic gates may then be used in combination to create a desired output from an input. In this page you can find one of the circuit.

 

 

Digital to Analog Converter 8 Bit Using R2R Circuit

 

 

 

 

Dengan menggunakan 17 buah resistor dan sebuah op-amp, maka kita dapat membangun sebuah digital to analog converter seperti terlihat pada Gambar 1.

 

 

 

 

 

Gambar 1. Rangkaian digital to analog converter.

 

Rangkaian di atas bekerja dengan asumsi D0 hingga D7 adalah tersambung ke data digital (tegangan 5 volt untuk logika 1 dan 0 volt untuk logika0). Dengan menggunakan teorema thevenin untuk menghitung Ri dan penghitungan R seri/paralel serta konversi delta ke bintang maka dapat diperoleh Vout seperti terlihat pada Gambar 1.

 

 

 

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