This Book is written for all the people who love innovation. It is the collection of 20 ideas to do some innovative project, to make something new. I believe this Book will be helpful for the students for their mini project. My effort will get success if you get any help like project idea, circuit diagram help from this book. Give your feedback by mailing me...
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Here is a simple and compact digital soil moisture tester to check whether the soil is dry or wet. It can also be used to check the dryness or wetness of cotton, woolen and woven fabric
DC-DC Converter
This simple circuit lets you run a 1W LED from the battery of your car. IC MC34063 is
used here as a buck converter. It is a monolithic switching regulator sub-system intended
for use as a DC-DC converter. The device consists of an internal temperature_x0002_compensated reference, a comparator, a controlled duty-cycle oscillator with an active
current-limit circuit, a driver and a high-current output switch. These functions are
contained in an 8-pin dual in-line package. Another major advantage of the switching
regulator is that it allows increased application flexibility of the output voltage
Another circuit
Conversion of AC to AC is quite simple as in compare to DC to DC converter because it only implies a transformer which converts AC from one voltage level to another voltage level. But conversion of DC to DC is quite tedious regulates voltage to 12 volt.
work without transformer and more power losses. Here is simple, low-cost, high precision circuit which converts 6-V DC to 12-V DC without using transformer and easy to construct with few component.
Circuit description of DC to DC conversion
The circuit of DC to DC conversion is build with a very popular IC LM555 used as multivibrator mood which generate required frequency range from 2 to 10 kHz to drive power transistor T2. Here potentiometer VR1 is used to adjust output frequency given to transistor T2 via resistor R3. A zener diode in this circuit is used as voltage regulator which
Here Inductor L1 of 100 turns, 24 SWG enameled copper wire wounded on a 40mm dia. toroidial ferrite core and capacitor C5 is employed for energy storage. Transistor T1 is used to control output control with the help of resistor R4 R5.
Multipurpose listening device
This circuit can detect very faint, remote sounds
with a good clarity. It is useful in large conference halls, auditoria, cinema halls, lecture rooms in colleges, etc. The circuit can be housed in a small plastic box and kept in a shirt pocket. It is especially useful for watching TV programmes at a low volume so as not to disturb other family members in the house
School/College Quiz Buzzer
Manual buzzers used for quiz competitions in schools and colleges create a lot of confusion in identifying the first respondent. Although there are circuits using PCs and discrete ICs, they are either too expensive or limited to only a few number of players
Crystal-Based 50Hz Generator
Here is a simple oscillator circuit that generates 50Hz frequency using a crystal. It produces alternating 50Hz pulses with 50 per cent duty cycle, which can be used in inverter circuits. It comprises a 14-stage counter and oscillator (CD4060), dual J-K flip-flop (CD4027), operational amplifier (LM324) and a few discrete components
DC Changeover System with Battery Protection Unit
Emergency lights commonly available in the market come with battery over-charging protection but no discharging protection. Here is a circuit that protects the battery from over-charging as well as over-discharging. The load is powered by the regulator when mains is available and automatically shifts to DC when mains power fails. When mains power resumes, the load is again powered through the regulator and the battery starts charging.
DC Motor speed Controler
Bedwetting Alarm
Accurate Foot-Switch
Certain industrial controls require accurate switching operations. For example, in case of a foot- switch for precise drilling work, even a small error in switching may cause considerable loss. This low-cost but accurate foot-operated switch can prevent that
Remote Control using Wireless Doorbell
This circuit lets you wirelessly control an appliance from a remote place by using a wireless doorbell. The appliance is triggered by the signal from the transmitter of the wireless doorbell and turns off automatically after the preset time period
Infrared Interruption Counter
Most optical interruption counters make use of a light bulb with light-dependent resistor (LDR) or ordinary phototransistor as the sensor. These interruption counters work satisfactorily in darkness only and cannot be used outdoors because of the chances of false counting due to light sensed from other light sources like sun, light bulb, etc.
IR sensors (infrared LEDs) to make an object-detection circuit
There are various applications of IR sensors such as TV remote controllers, burglar alarms and object counters. Here we have used IR sensors (infrared LEDs) to make an object-detection circuit and also a proximity sensor for path-tracking robots. The basic idea is to transmit the infrared light through an IR LED, which is then reflected by any obstacle ahead and sensed by the receiving LED
Temperature-Tolerance Checking System
Most of instruments and machines used in industries and research laboratories have a temperature-tolerance limit. These can neither be subjected to too high nor too low a temperature for their proper functioning. But they need to function accurately as they are always used in critical applications
Another circuit
(IRF)
infrared (IR) remote controller comprises the transmitter and receiver sections. The range of the transmitter can be increased up to 5 meter by using convex lens.
Circuit Description of infrared (IR) remote controller Transmitter section: – The transmitter circuit of infrared (IR) remote controller is built around IC 741 (IC1) wired as frequency square wave oscillator. Gate pulse from pin no 6 of IC1 is given to gate of SCR1 to drive IR LED1. Variable resistor VR1 is used to vary the generated frequencies. Receiver Section: – The receiver circuit of infrared (IR) remote controller consist an IC 741, photo transistor (T1) and medium power transistor (T2).
PARTS LIST FOR THE ABOVE DIAGRAM
Resistors (all ¼-watt, ± 5% Carbon)
R1,R2 = 100 KΩ; R3, R5, R8 = 1 KΩ; R4 = 15 Ω; R6 = 22 KΩ; R7 = 10 MΩ; VR1 = 1 MΩ; VR2 = 2.2 MΩ
Capacitors
C1, C3, C4 = 0.1 µF; C2 = 1 µF/100V; C5 = 2.2 µF/16V
Semiconductors
IC1, IC2 = 741; SCR1 = SN050; T1 = photo transistor; T2 = SL100; D1, D2 = 1N4001 Miscellaneous
RL1 = 15V, 500Ω Relay; IR LED.
Simple Key-Operated Gate Locking System
This simple key-operated gate locking system allows only those persons who know the preset code to open the gate. The code is to be entered from the keypad within the preset time to operate the motor fitted in the gate. If anyone trying to open the gate presses a wrong key in the keypad, the system is disabled and, at the same time, sounds an alarm to alert you of an unauthorised
Mains Box Heat Monitor
This simple circuit monitors the mains distribution box constantly and sounds an alarm when it senses a high temperature due to overheating, helping to prevent disasters caused by any sparking in the mains box due to short circuits. It also automatically switches on a bright white LED when the power fails. The LED gives ample light to check the mains box wiring or fuses in darkness. The circuit beeps once when power fails and again when power resumes
Faulty Car Indicator Alarm
Before taking a turn, either left or right, car drivers need to switch on the car turn indicator lamps so that the approaching vehicle drivers can take precaution accordingly. An accident is likely to occur in case your car turn indicator lamps fail to glow due to some reason or the other. Here is a circuit that sounds an alarm if your turn indicator lamps don't glow, helping you to safeguard against any acciden
1W LED For Automotive Applications
This simple circuit lets you run a 1W LED from the battery of your car. IC MC34063 is used here as a buck converter. It is a monolithic switching regulator sub-system intended for use as a DC-DC converter. The device consists of an internal temperature- compensated reference, a comparator, a controlled duty-cycle oscillator with an active current-limit circuit, a driver and a high-current output switch. These functions are contained in an 8-pin dual in-line package. Another major advantage of the switching regulator is that it allows increased application flexibility of the output voltag
Play With Robotic Eye (IR Sensor)
There are various applications of IR sensors such as TV remote controllers, burglar alarms and object counters. Here we have used IR sensors (infrared LEDs) to make an object-detection circuit and also a proximity sensor for path-tracking robots. The basic idea is to transmit the infrared light through an IR LED, which is then reflected by any obstacle ahead and sensed by the receiving LED
Handy Tester
For beginners, here’s a low-cost multitester that can be used to test the condition of almost all the electronic components from resistors to ICs. It uses only a few components but can also detect polarity, continuity, logic states and activity of multivibrators
Very Useful Free Ebooks On Robotics And It's verious Aspects
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1654&title+=+7+Free+eBooks+On+Instrumentation+Engineering&b_type=new&id=12665
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1655&title+=+5+Free+eBooks+On+Robust+Control&b_type=new&id=12666
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1640&title+=+9+Free+eBook+On+Electromagnetics%21&b_type=new&id=12598
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1626&title+=+8+Free+eBooks+On+Assembly+And+Machine+Language+Programming&b_type=new&id=12569
- http://www.efytimes.com/e1/fullnews.asp?edid=124581
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1626&title+=+8+Free+eBooks+On+Assembly+And+Machine+Language+Programming&b_type=new&id=12569
- http://www.efytimes.com/e1/fullnews.asp?edid=122400
- http://www.efytimes.com/e1/fullnews.asp?edid=124022
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1626&title+=+8+Free+eBooks+On+Assembly+And+Machine+Language+Programming&b_type=new&id=12569
REFERENCE
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1622&title+=+6+Free+eBooks+On+Microprocessors+And+System+Design&b_type=new&id=12581
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1636&title+=+15+Free+eBooks+On+Hardware+Design+And+Architecture%21&b_type=new&id=12587
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1640&title+=+9+Free+eBook+On+Electromagnetics%21&b_type=new&id=12598
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=944&a rticle_type=1&id=821&tt=unhot&b_type=new
- http://www.electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=2 27
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1148&article_type=1&id=991&tt=hot&b_type=new
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1149&article_type=1&id=992
- 1.http://electronicsforu.com/newelectronics/lab/freecircuitslist.asp?id=1028
- http://electronicsforu.com/newelectronics/lab/freecircuitslist.asp?id=1026
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=896&article_type=1&id=738&tt=unhot&b_type=new
- http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=892&article_type=1&id=741&tt=unhot&b_type=new
