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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.

 

 

Indikator Level Tegangan Aki 12 Volt

 

 

 

Rangkaian berikut adalah berguna untuk menunjukan level tegangan aki (batere) 12 volt. Level tegangan ditunjukan dengan menyalanya empat buah led. Untuk mempermudah pembacaan maka led disusun dalam larik vertikal. Tiga buah Led teratas dipilih dengan warna hijau sedangkan led yang paling rendah dipilih warna merah. Jika tegangan batere terus menurun (karena pemakaian) maka Led-Led akan mati secara berurutan dari yang teratas sampai yang terbawah. Hingga jika tegangan batere adalah di bawah 11.83 volt maka hanya led warna merah saja yang menyala yang berarti bahwa muatan batere adalah kosong. Led merah inipun akan mati jika tegangan terus turun hingga di bawah 11.5 volt.

 

Prinsip kerja dari rangkaian ini adalah pembandingan tegangan batere dengan tegangan referensi.

 

 

 

 

 

Gambar Rangkaian indikator level tegangan batere.

 

 

 

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