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E
HUB
Fastest || Creative|| Affordable
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Anti
Bag Snatching Alarm:
This is a simple alarm circuit to thwart snatching of your valuables while
travelling. The circuit kept in your bag or suitcase sounds a loud alarm,
simulating a police horn, if someone attempts to snatch your bag or suitcase.
This will draw the attention of other passengers and the burglar can be
caught red handed. In the standby mode, the circuit is locked by a plug and
socket arrangement (a mono plug with shorted leads plugged into the mono-jack
socket of the unit). When the burglar tries to snatch the bag, the plug
detaches from the unit’s socket and activates the alarm.
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Automatic
Plant Watering System:
This one of the most useful project in our real life. It helps us in watering
plants automatically without any human interference. We may also call it as
Automatic plant irrigation system. We know that people do not pour the water
on to the plants in their gardens when they go to vacation or often forget to
water plants. As a result, there is a chance to get the plants damaged. This
project is an excellent solution for such kind of problems.
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Water
Level Indicator:
The Water Level Indicator employs a simple mechanism to detect and indicate
the water level in an overhead tank or any other water container. The sensing
is done by using a set of nine probes which are placed at nine different
levels on the wall of the tank (with probe1 to probe8 placed in ascending
order of height, common probe (i.e. a supply carrying probe) is placed at the
base of the tank). The level 8 represents the “tank full” condition while
level 1 represents the “tank empty” condition. It can be used in automatic ON
and OFF of the motor depending on the water level. It can also be used as
fuel level indicator in vehicles.
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IR
Remote Control Switch:
By using this circuit, we can control any house hold appliance with the help
of remote. Electronic appliances like television, radio, air conditioner etc.
can be controlled. In this project, there are two parts: one is the
transmitting section (remote) and the other is receiving section which is
stable and connected to the appliance.
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Battery
Charger Circuit Using SCR:
Here is the circuit diagram of battery charger circuit using Silicon
Controlled Rectifier. Using this circuit, we can automatically charge a
battery when its charge is below a threshold and the circuit is disabled when
the battery attains full charge. SCR is used in rectification circuits,
inverter circuits, power control circuits, etc.
Temperature Controlled DC Fan using Microcontroller:The main principle of the circuit is to switch ON the fan connected to DC
motor when the temperature (measured through a temperature sensor) is greater
than a threshold value. This can be used in home applications particularly in
CPU to reduce heat by automatically switching ON the fan.
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Password
Based Door Lock System using 8051 Microcontroller: This system demonstrates a
password based door lock system wherein once the correct code or password is
entered, the door is opened and the concerned person is allowed access to the
secured area. After some time, the door would be closed. Read this post completely
to get more information.
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Thermistor
Temperature Sensing Alarm: This circuit is a temperature sensing as well
as alarm circuit. The circuit raises an alarm whenever the temperature
crosses a certain limit.
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Wireless
Mobile Battery Charger Circuit: This circuit mainly works on the principle of
mutual inductance. This circuit may be used as wireless power transfer
circuit, wireless mobile charger circuit, wireless battery charger circuit,
etc.
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