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Garden Lighting refers to the use of outdoor light sources, which may be fire-based (in the form of torches and lamps) or electricity-based (in the form of light bulbs, neon lamps, etc.).

 

It is probable that gardens have been illuminated for as long as houses have been illuminated, by firelight and then by oil light. Each subsequent form of illumination has been used in gardens, including gas light in the nineteenth century and electric light in the twentieth century. Electricity remains the most popular form of garden lighting in the twenty-first century. It is normally supplied from main power stations but there is a growing trend towards the use of solar power for garden lighting.

 

By a simple applied technology, such as electronics, we can solve many simple problem in daily need. 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.

 

 

Automatic Garden Lighting

 

LDR merupakan jenis resistor yang peka cahaya. Nilai resistansinya akan turun ketika ada cahaya yang mengenai LDR. Dalam kondisi gelam, nilai LDR akan sangat besar (mendekati mega ohm). Dengan sifatnya yang seperti itu maka LDR dapat dimanfaatkan untuk mengendalikan hidup-matinya lampu taman. Rangkaiannya dapat dilihat pada Gambar 1 berikut. Ketika LDR dikenai cahaya matahari, maka nilai resistansinya akan sangat rendah, yang menyebabkan transistor c 9013 akan mati. Karena c 9013 mati maka basis dari c 9012 akan tinggi, sehingga relay tidak dialiri arus listrik. Hasil akhirnya adalah lampu padam, demikian sebaliknya, kalau malam maka relay akan dialiri listrik sehingga saklar menutup dan lampu akan menyala. Untuk mengatur kepekaan LDR, maka nika VR 1k dapat diubah sesuai dengan kecerahan cahaya yang kita inginkan.

 

 

 

 

 

 

Gambar 1. Rangkaian penyaklar lampu taman otomatis.

 

 

 

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