This document describes the design and working of a touch sensor circuit. The circuit uses a touch sensor, LED, piezo buzzer, and 9V battery. When an object touches the sensor, the LED lights up and buzzer sounds for about 100 seconds before turning off automatically. The touch sensor works like a switch, completing a circuit when touched to allow current to flow. The circuit has applications in touch-operated devices like bells and toys due to its quick response and low cost.
A Measurements Project on Light Detection sensorsvrohith 9
The main aim of this project is to saving system with LDR this is to save the power. We want to save power automatically instead of doing manual. So it’s easy to cost effectiveness. This saved power can be used in some other cases. So in villages, towns etc. we can design intelligent systems for the usage of light or we can also use this to reduce the electricity bill of our home. This project can also be used for security of the houses, banks, etc.
A Measurements Project on Light Detection sensorsvrohith 9
The main aim of this project is to saving system with LDR this is to save the power. We want to save power automatically instead of doing manual. So it’s easy to cost effectiveness. This saved power can be used in some other cases. So in villages, towns etc. we can design intelligent systems for the usage of light or we can also use this to reduce the electricity bill of our home. This project can also be used for security of the houses, banks, etc.
This Presentation provides some basics of Sensors Technology.........
It gives few ideas to learn about sensors which are as normally used as electrical & electronics applications.......
More Basics of Electrical and Electronics can be see on http://bit.ly/2PIOIQM
A multimeter or a multitester, also known as a VOM, is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter can measure voltage, current, and resistance. Analog multimeters use a microammeter with a moving pointer to display readings.
First op amps built in 1930’s-1940’s
Technically feedback amplifiers due to only having one useable input
Used in WW-II to help how to strike military targets
Buffers, summers, differentiators, inverters
Took ±300V to ± 100V to power
This Presentation provides some basics of Sensors Technology.........
It gives few ideas to learn about sensors which are as normally used as electrical & electronics applications.......
More Basics of Electrical and Electronics can be see on http://bit.ly/2PIOIQM
A multimeter or a multitester, also known as a VOM, is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter can measure voltage, current, and resistance. Analog multimeters use a microammeter with a moving pointer to display readings.
First op amps built in 1930’s-1940’s
Technically feedback amplifiers due to only having one useable input
Used in WW-II to help how to strike military targets
Buffers, summers, differentiators, inverters
Took ±300V to ± 100V to power
This anti-sleep alarm keeps you awake. This circuit keeps you vigilant by sounding intermittent beeps and emitting flashing light so as to remind you that you are not on the bed but driving a vehicle. It works only at night due to the control of a light-dependent resistor (LDR) based switch.
A water detector is an electronicdevice that is designed to detect the presence of water and provide an alert in time to allow the prevention of water damage.
4. ABSTRACT
2019
2016
A touch switches apparatus for detecting
the presence of an object such as a human appendage,
the apparatus having a switch and a local control circuit
connected to the switch and to a
controlled device. The control circuit is preferably in integrated circ
uit form Electronic on / off switch for a load connected to an
ac supply network, including a controlled semi conductor
switch connected in a series circuit with the load, control circuit.
5. This kind of sensor switch is suitable for
making touch operated bells, buzzers of small
toys which operate for a small time and then
switch off automatically.
The input impedance of the trigger is very high
and the touch sensor switch can be triggered by
the voltage induced in the human body. The
relay is a 12 V DC relay operating at currents
less than 200 mA.
Just need to touch the metal plate and the relay
gets energized and is kept in this state for
about 100 seconds, then it's released.
CIRCUIT DESIGN
6.
7.
8. Those blink things. A must
have for power indication, pin
status, opto - electronic
sensors, and fun binky
displays.
This is a basic 5mm LED with
a green lens. It has a typical
forward voltage of 2.0V and a
rated forward current of 20mA.
Green and solid light
indicates that the battery is
charged and that the sensor is
switched on, but not
connected.
9. PIEZO - BUZZERS
•sound generators
•Piezo buzzers With driver
circuit
•80 up to 85 up Low
current consumption
•Clear and intense sound
•Built - in drive circuit
•Extended operating voltage range
10. 9V BATTERY
9v battery is a common size of battery,
that was introduced for the early transistor
radios.
It has a rectangular prism shape with
rounded edges and a polarized snap connector
at the top.
11. PRINCIPLE
A touch sensor works like a switch, where
when there’s contact, touch, or pressure on
the surface of a touch sensor, it opens up an
electrical circuit and allows currents to flow
through it.
These sensors are sensitive to any pressure
or force applied or touch. The principle of
touch is similar to that of a switch. When the
switch is closed, the current flows otherwise
there is no chance of the current to flow.
Similarly, when the touch sensor senses the
touch or proximity is captured then it acts
like a closed switch otherwise it acts as an
open switch. These sensors are also known
as ‘Tactile Sensors’.
12. •It will be damage if the input DC voltage go
over 15V .
•Unexpected alert ,i.e accidental alarm
•Doesn't provide wireless control to system
•The switch can be used for switching AC as well
as DC.
•It is best to use a 9V12V DC regulated or
unregulated power supply.
•It is used in various applications due to its
quicker response .
•Low cost
ADVANTAGE DISADVANTAGE
