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Monday 10 June 2013

water level alarm - a mini project of EEE

Circuit diagram:

Parts:

R1_______________1K  1/4W Resistor
R2_____________100K  1/4W Resistor (See Notes)

C1_______________2µ2  50V Electrolytic Capacitor
C2_____________220µF  25V Electrolytic Capacitor (See Notes)

D1______________5 or 10mm. Ultra-bright red LED (See Notes)
D2____________1N5819  40V 1A Schottky-barrier Diode (See Notes)

IC1_____________7555 or TS555CN CMos Timer IC

BZ1____________Piezo sounder (incorporating 3KHz oscillator)

B1_____________1.5V Battery (AAA or AA cell etc.)

Two small crocodile clips
Two pieces of stiff wire of suitable length
Battery socket, etc.
________________________________________
Device purpose:
This circuit will emit an intermittent beep (or will flash a LED) when the water contained into a recipient has reached the desired level. It should be mounted on top of the recipient (e.g. a plastic tank) by means of two crocodile clips, acting also as probes. If a deeper sensing level is needed, the clips can be extended by means of two pieces of stiff wire (see pictures).


Circuit operation:
IC1, a 555 CMos timer chip, is wired as an astable multivibrator whose operating frequency is set by C1, R1 and R2, plus the resistance presented by water across the probes. If the resistance across the probes is zero (i.e. probes shorted), the output frequency will be about 3Hz and the sounder will beep (or the LED will flash) about three times per second.
As water usually presents a certain amount of resistance, the actual oscillation frequency will be lower: less than one beep/flash per second. As probes will be increasingly immersed in water, the resistance across them will decrease and the oscillation frequency of IC1 will increase. This means that a rough aural or visual indication of the level reached by water will be available.
If a LED is chosen as the alert, C2, D1 and D2 must be added to the circuit in order to double the output voltage, thus allowing proper LED operation (see the rightmost part of the schematics).
Interesting features of this circuit are 1.5V supply and ultra-low current consumption: 40µA in stand-by and 0.5mA in operation. This allows a single AAA alkaline cell to last several years and the saving of the power on/off switch.
Notes:
•       If a LED alert is needed instead of the beeper, R2 value must be changed to 10K, the Piezo sounder can be omitted and D1, D2 and C2 must be added, as shown in the rightmost part of the schematics.
•       A common red LED can be used for D1, but ultra-bright types are preferred.
•       Any Schottky-barrier type diode can be used in place of the 1N5819, e.g. the BAT46, rated @ 100V 150mA.
•       Wipe the probes regularly to avoid excessive resistance variations due to partial oxidization.

for details visit :web

Tuesday 4 June 2013

EEE mini projects


Electrical and Electronics Mini Projects
1.   AC Motor Speed Control Using Power TRIAC With Display Unit
2.   Automatic Room Light Controller With Visitor Counter
3.   Automatic college bell
4.   Automatic plant irrigation
5.   Automatic Power Factor Corrector Using Capacitive Load Bank Project Report
6.   Chopper Based  DC Motor Speed Control
7.   Controlling Of Incandescent Bulbs Intensity By Using Microcontroller
8.   Density Sensed Street Light Intensity Control To Save Energy
9.   Design Of Digital Energy Meter
10.                Digital Frequency Meter
11.                Microcontroller Based Advanced Automatic City Street Light Controller
12.                Microcontroller Based Power Theft Identification
13.                Microcontroller Based Automation Of Drip Irrigation System Project
14.                Modeling And Simulation Of Speed Of A Doubly Fed Induction Motor
15.                Pc Based Dc Motor Speed Control Using PWM
16.                Power Saving Iron Box
17.                Project Report On Microcontroller Based Dc Motor Speed Controller
18.                Project Report On Real Time Operation Of Circuit Breakers
19.                Project Report On Transformer Overload Alert
20.                Single Phase Half Wave Controlled Rectifier
21.                Speed Control Of Dc Motor By Using PWM Technique EEE Project
22.                Transformer Over Load Alert Through Voice Announcement
23.                Blown Fuse Indicator
24.                Call Bell
25.                Cell Phone Detector
26.                Dc Motor Controller
27.                Digital Voltmeter
28.                Fuse monitor



Electrical and Electronics Mini Projects
Prototype:
1.       Transformers overload alert voice system
2.       Electric data logger ( V,I,F,T)
3.       Automatic overheat controller for machines  
4.       Transformer  less solar inverter      
5.       Talking energy meter                    
6.       Wireless switch 46766              
7.       DC motor starter using MOSFET          
8.       Automatic room light and fan control with the visiting count  
9.       Power factor correction using multiple capacitor bank          
10.   Harmonic reduction using
                                                              i.      Capacitor clamped multilevel inverter
                                                            ii.      Diode clamped multilevel inverter
11.   SRIM drive with slip recover using IGBT                               
12.   Energy saving in single phase induction motor using AC choppers       
13.   Single phase induction motor with electrically controlled capacitor   
14.   Wireless power theft detection             
15.   High voltage flux blown indicator with voice based announcement system   
16.   Wireless power factor monitoring and control through personal computer  
17.   A new adjustable speed drive system based on high performance Z source inverter
Speed controllers:
18.   PWM based DC motor closed loop speed controller
19.   wireless (remote) speed control of single phase AC motor
20.   Speed control of DC motor using thyristor using dual converter 
21.   AC motor control using TRIAC
22.   Simple DC motor PWM speed control using 555 timer
23.   Microcontroller based single phase cyclo converter for single phase induction motor  
24.   Closed loop speed control of induction motor using microcontroller  
25.   Three phase  AC motor controller using IGBT   
Simulation:
1.       Study of solar PV panels using MATLAB
2.       Wireless microcontroller based transmission line cut indicator
3.       Power upgrading of transmission line by combining AC-DC transmission
4.       Direct torque control system of an induction motor
5.       Power factor correction using series active filter
6.       System harmonic compensation using PWM based shunt active power filter
7.       An inrush mitigation technique of load transformer for series voltage sag compensator
8.       Current harmonic compensation and power factor improvement by hybrid shunt active power filter
9.       Reducing motor derating and torque pulsation of induction motor using matrix converter
10.   Modeling of DSTATCOM with ultra capacitor energy storage for power distribution system applications
11.   Magnetic losses for non-sinusoidal waveforms found in AC motor

You can simply have the above circuit sketch and explanation within low price. The total circuit can also be obtained on order. For further details contact sravan.kumar916@gmail.com
Electronic Mini Projects
1. 10 minute timer
2. Battery Discharge Monitor
3. Doorbell for the Deaf
4. Fan control
5. Fan speed controller using LM2941
6. Flashing LED Project
7. How to make a Rheostat
8. Led light sequencer using 555 timer:
9. LED or Lamp Flasher
10.            LED Torch
11.            Mobile incoming call indicator
12.            One transistor code lock
13.            Shock alarm circuit
14.            Simple Burglar Alarm Circuit
15.            Simple Electronic Fuse
16.            Simple Refrigerator Door Alarm
17.            Simple UPS
18.            Solar charger for 6v battery
19.            Temperature controlled LEDs
20.            Theft preventer alarm
21.            Touch alarm circuit
22.            Voltage Doubler
23.            Voltmeter circuit using LED
You can simply have the above circuit sketch and explanation within low price. The total circuit can also be obtained on order. For further details contact sravan.kumar916@gmail.com


You can simply have the above circuit sketch and explanation within low price. The total circuit can also be obtained on order. For further details contact sravan.kumar916@gmail.com

mini projects for electrical and electronics (EEE), ECE

here I'm presenting some of the titles for the mini projects for eee and ece students . look over them


Electrical and Electronics Mini Projects
1.   AC Motor Speed Control Using Power TRIAC With Display Unit
2.   Automatic Room Light Controller With Visitor Counter
3.   Automatic college bell
4.   Automatic plant irrigation
5.   Automatic Power Factor Corrector Using Capacitive Load Bank Project Report
6.   Chopper Based  DC Motor Speed Control
7.   Controlling Of Incandescent Bulbs Intensity By Using Microcontroller
8.   Density Sensed Street Light Intensity Control To Save Energy
9.   Design Of Digital Energy Meter
10.                Digital Frequency Meter
11.                Microcontroller Based Advanced Automatic City Street Light Controller
12.                Microcontroller Based Power Theft Identification
13.                Microcontroller Based Automation Of Drip Irrigation System Project
14.                Modeling And Simulation Of Speed Of A Doubly Fed Induction Motor
15.                Pc Based Dc Motor Speed Control Using PWM
16.                Power Saving Iron Box
17.                Project Report On Microcontroller Based Dc Motor Speed Controller
18.                Project Report On Real Time Operation Of Circuit Breakers
19.                Project Report On Transformer Overload Alert
20.                Single Phase Half Wave Controlled Rectifier
21.                Speed Control Of Dc Motor By Using PWM Technique EEE Project
22.                Transformer Over Load Alert Through Voice Announcement
23.                Blown Fuse Indicator
24.                Call Bell
25.                Cell Phone Detector
26.                Dc Motor Controller
27.                Digital Voltmeter
28.                Fuse monitor
You can simply have the above circuit sketch and explanation within low price. The total circuit can also be obtained on order. For further details contact sravan.kumar916@gmail.com