|
A Water
detector is a small electronic device that is designed to detect the presence of
water and alert humans in time to allow the prevention of water damage. A common
design is a small device that lays flat on a floor and relies on the electrical
conductivity of water to decrease the resistance across two contacts. A 9 volt
battery then sounds an audible alarm in the presence of enough water to bridge
the contacts. These are useful in a normally occupied area near any appliance
that has the potential to leak water, such as a washing machine, refrigerator
with icemaker, dehumidifier, air conditioner, or water heater.
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.
Water Level Control
Dengan menggunakan rangkaian pendeteksi air serta
komponen inverter, D flip-flop dan rangkaian relay, maka dapat dibangun
sistem kontrol pompa air untuk menjaga kondisi tangki tetap terisi air.

Gambar 1. Rangkaian Kendali Pompa Air.
Ketika air berada di bawah level terbawah, maka pin set
dari D flip-flop akan diberi sinyal rendah sehingga keluaran Q akan tinggi
dan membuat saklar relay menutup dan pompa air bekerja. Ketika air mencapai
level tertinggi, maka pin clear akan diberi sinyal rendah yang akan
mematikan pompa. Dengan demikian maka tangki air akan terjaga selalu dalam
kondisi terisi.

|