Basic Electronics/Electrical Projects & Kits

Get our latest collection of basic electronics projects here -- all tested and reviewed for use in mini projects and main projects or even just as hobbyist projects!
Simple Automatic Water Level Controller Save Rs. 45.00

Simple Automatic Water Level Controller

by KNS Pvt Ltd
Save Rs. 45.00
Rs. 225.00
Rs. 180.00

Summary

This is a simple Automatic water controller Kit which the users can assemble in minutes and starting experimenting with it. The circuit is built around a TIMER555 and a inverting buffer CD4049. Circuit works on a 12V DC supply. Three sensors are installed with the kit to indicate lower level, higher level and VCC. At bottom of the tank VCC is placed,lower level L is placed above the VCC and higher level H is placed at the top.

Get the kit now and build yourself a reliable water controller and get amazed by how this tiny little device takes care of water level in the tank!!

Learning

Things Which you can learn:

*Application of NE555 timer.
*Application of CD4069 as inverter.
*Application and connection of relay switches to control the on/off of appliances.

Product Description

Water-level controllers are common nowadays and have become essential device in conserving water which otherwise would get wasted as the tank gets full up to its brim. The one described here is built around timer NE555 and inverter buffer CMOS IC CD4049. It uses readily-available, low-cost components, and is easy to build and install on the over-head tank (OHT) to prevent wastage of water.

Working


The circuit works off a 12V battery or 230V AC mains using a 12V adaptor. Since Vcc terminal is at the bottom of the tank, when the water level falls below sensor L, timer IC2 is triggered at pin 2 via inverters N1 and N2 and its output goes high. As a result, the output of timer IC2 goes high. Relay RL1 energises and the motor starts filling water in the tank. The motor remains ‘on’ even when the water level crosses sensor L.

As water in the tank rises to touch sensor H, timer IC2 is retriggered at pin 6 via inverters N3 and N4 and as a result, its outputgoes low. The relay de-energises and
the motor stops filling water in the tank. The motor remains ‘off’ even when the water level falls below sensor H. As water is consumed and its level falls below sensor L, the motor restarts.Thereafter, the cycle repeats.

Brand: Kits'n'spares, Marketed by: Kits'n'spares

 

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Numeric Water Level Indicator with Display Save Rs. 75.00

Numeric Water Level Indicator with Display

by KNS Pvt Ltd
Save Rs. 75.00
Rs. 300.00
Rs. 225.00

Summary

Most water level indicators are equipped to indicate and detect only a single level. The Numeric Water Level Indicator implemented here can indicate up to nine such levels and displays the level no. on a seven segment display. Hence, not only is the circuit capable of cautioning a person that the water tank has been filled up to a particular level, it can also indicate that the water level has fallen below the minimum level.

This is particularly important in appliances such as the desert cooler where there is a danger of motor-burnout when the water is used up. This circuit exploits the simple fact that water is a good conductor of electricity. The placement of nine probes (having connections to the circuit) at different heights inside the water tank determines the nine different detectable levels. When the water reaches a particular height in the tank; the seven segment display shows the corresponding level no., digit 9 representing the “tank full” condition and digit 0 representing the “tank empty” condition.

Learning

Things which you can learn:


*Application of the Priority Encoder IC 74HC147
*Application of the BCD to Seven Segment Decoder IC CD4511 (for driving seven segment displays).

Product Description

The Numeric Water Level Indicator employs a simple mechanism to detect and indicate the water level in a tank or any other container. The level sensing is done by a set of nine probes which are placed at nine different levels on the tank walls (with probe9 to probe1 placed in decreasing order of height, COM probe is placed on the base of the tank). Basically, level9 represents the “tank full” condition while COM represents the “tank empty” condition.

Working

When the tank is empty, all the inputs to the priority encoder 74HC147 (IC1) remain high, as a result its output also remains high. Since these outputs are inverted and fed as inputs to the decoder driver CD4511 (IC2), all inputs to IC2 are low.

The seven segment display correspondingly shows the digit 0, indicating that the tank is empty.

When the water reaches level1 (but is below level2), pin11 (A0) of IC1 is pulled to ground and the output generated at pin9 (Y0) of IC1 also becomes low. After inversion, the bits fed to the input pins of IC2 are 0001 (DCBA). Hence, the corresponding digit displayed by the seven segment display is 1. The similar mechanism applies to the detection of all the other levels.
When the tank is finally full, all inputs to IC1 become low and all its outputs also go low. This causes all the inputs to IC2 to go high and hence the display shows a 9, thereby indicating a “tank full” condition.

 

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Moisture Monitor For Plants Save Rs. 50.00
Rs. 300.00
Rs. 250.00

Moisture Monitor For Plants

Moisture Monitor For Plants

by KNS Pvt Ltd
Save Rs. 50.00
Rs. 300.00
Rs. 250.00

Summary

The circuit is based on CD4060 14 Stage binary ripple counter which provides a frequency at pin 7 of the CD4060 which is decreased at pin 4 and gives a train of pulses for the transistor to switch the buzzer

Learning

CD4060 is a ripple counter IC which is widely used in digital electronics and this circuit teaches a concept which can be used to innovate new circuits based on CD4060

Product Description

Over-watering and under watering both are harmful to plants. Roots need air as well as water. If the soil is constantly saturated, air cannot reach the roots and they suffocate. Also, excess water weakens the plant and makes it susceptible to various diseases, particularly fungal attacks. Underwatering, on the other hand, is equally harmful. Plants not receiving enough water drop from the top down and leaf edges turn brown. Moisture monitor provides a solution to the above problem by monitoring the moisture level of the soil and producing an audio visual alert when the moisture goes below a preset level, indicating that the plant needs to be watered.

Click To View Circuit Diagram

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Sunset Lamp
Rs. 100.00

Sunset Lamp

Sunset Lamp

by KNS Pvt Ltd
Rs. 100.00

Summary

This kit is based on the principle of Light dependent resistor . Thus when the sun sets the ambient light in the environment decreases and thus the light glows up.

Learning

Things which you will learn:

*Application of NE555 in bi stable mode.
*Concepts related to the working of Light Dependent Resistors.
*Application of TRIAC BT136.
*Application of Zener Diode.

Product Description

Build this automatic sunset light , which will light up when its dusk and will help in conserving electricity .

Working

The circuit uses popular timer IC NE555 as a Schmitt trigger to give the bistable action. The set and reset functions of the comparators within the NE555 are used to give the instantaneous action. The upper threshold comparator of IC1 trips at 2/3Vcc, while the lower trigger comparator trips at 1/3Vcc.The inputs of both the threshold and the trigger of NE555 are tied together and connected to the voltage divider formed by LDR1 and
VR1. The voltage across LDR1 depends on the light intensity.

In daylight, LDR1 has low resistance and the input voltage to the threshold comparator goes above 2/3Vcc and its output becomes zero, and the lamp remains off.
At sunset, the resistance of LDR1 increases, and the voltage at the input of the threshold comparator decreases below 2/3Vcc and that of the trigger comparator goes below 1/3Vcc. As a result, the outputs of threshold and trigger comparators go high. Thus it completes the power supply to the lamp through triac1. LED1 glows to indicate the high output state.

 

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Door Guard Save Rs. 50.00
Rs. 300.00
Rs. 250.00

Door Guard

Door Guard

by KNS Pvt Ltd
Save Rs. 50.00
Rs. 300.00
Rs. 250.00

Thieves often target locked houses. This door guard circuit detects any vibration in its vicinity when somebody tries to break open the door. A simple circuit to protect all your valuable things.

Learning from this project

Things which you can learn:

  • Application of UM3561 IC.
  • Working of the transistor as an amplifier.
  • Working of MOSFET BS170.
  • Application of piezoelectric sensor.

Product Description

This is a simple door guard circuit which is based on piezo electric sensor to detect changes in the vibration caused due to the opening of doors.

Project working

The heart of the circuit is the piezo transducer (PZ1), which is the sensor element. If anyone attempts to open the door, the piezo element vibrates and the developed voltage drives transistors T1 and T2 into conduction. Then the alarm sounds for 20 seconds, which is taken care of by MOSFET T3 along with capacitor C1 and resistor R4 wired as a monostable timer.

 

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Long Range Burglar Alarm Using Laser Torch Save Rs. 75.00

Long Range Burglar Alarm Using Laser Torch

by KNS Pvt Ltd
Save Rs. 75.00
Rs. 450.00
Rs. 375.00

Summary

Most laser torch based burglar alarms work in darkness only. But this Long Range Burglar Alarm can work reliably in the daytime as well to alert you about intruders and burglars. The Burglar Alarm comprises of the laser transmitter and receiver units, to be mounted on the opposite pillars of the possible entry points. Whenever anyone enters to interrupt the transmitted laser beam falling on the receiver, the buzzer in the receiver circuit sounds an alarm. No. of ICs used: 1 Note-Laser torch will not be provided by KnS.

Learning

Things which you can learn:

*Application of NPN transistors for switching purposes.
*Use of the Photo-Darlington 2N5777 for sensing purposes.
*Application of the NE555 timer IC as a multivibrator to generate oscillations of a particular frequency.

Product Description

The range of the Burglar Alarm is approximately 30 meters, which means that the transmitter and receiver units can be placed up to 30 meters apart. Since the laser torch can transmit light up to a distance of 500 meters, this range can be increased by proper orientation of the photo-transistor. However, to avoid false triggering by sunlight, the photo-transistor should be mounted in such a way that it doesn’t directly face sunlight.Build this circuit and prevent theft in your premises.

Working

The transmitter circuit is powered by 3V DC. The multi-vibrator built around NE555 timer (IC1) produces a frequency of 5.25KHz. The body of the laser torch is connected to the emitter of the NPN transistor SK100 (T1) and the spring-loaded lead protruding from inside the torch is connected to the ground.
The receiver circuit is powered by 12V DC. It uses the photo-Darlington 2N5777 (T2) to sense the laser beam transmitted from the laser torch. The output beam signals from the photo-Darlington are given to the two-stage amplifier followed by a switching circuit. As long as the laser beam falls on photo-Darlington T2, the 12V relay (RL1) remains unenergized and the buzzer does not sound. Also, the indicating LED (LED1) doesn’t glow.
When anyone interrupts the laser beam falling on photo-Darlington T2, NPN transistor BC547 (T6) stops conducting while NPN transistor SL100 (T7) is driven into conduction. As a result, LED1 glows and relay RL1 is energize to sound the buzzer for a few seconds (the alarm duration being determined by the values of resistors R15 and capacitor C10 in the circuit). At the same time, the large indication load (230V AC alarm or hooter for louder sounds or any other device for momentary indication) also gets activated as it is connected to 230V AC mains via normally opened (N/O) contact of relay RL1.

Click To View Circuit Diagram

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Temperature Controlled Fan

Temperature Controlled Fan

by KNS Pvt Ltd
Rs. 3,000.00

Product Description

This Project is used to control the fan speed according to the temperature and it also indicates the temperature. The system will get the temperature from the IC (DS1820) and it will control the speed according to the values stored in the code. The System is fully controlled by an 8-bit microcontroller.

Brand: HBeonLabs, Product assembled by HBeonLabs

 

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Automatic Room Light Controller with Visitor Counter Save Rs. 301.00

Automatic Room Light Controller with Visitor Counter

by KNS Pvt Ltd
Save Rs. 301.00
Rs. 3,300.00
Rs. 2,999.00

This automatic room light controller project with visitor counter is a reliable circuit based on the AT89S52 microcontroller. It takes over the task of controlling room lights as well us counting the number of people in a room accurately. When somebody enters a room, the counter is incremented by one and the light in the room is switched 'ON' and when any one leaves the room, the counter is decremented by one. Light is only switched 'OFF' when all the people in the room go out.

The total number of people inside the room is also displayed on the seven segment display by the microcontroller. It receives signals from the sensors, and this signal is operated under the control of software stored in ROM. Microcontroller AT89S52 continuously monitors the Infrared receivers. When any object passes through IR receivers, the IR rays falling on the receivers are obstructed, this obstruction is sensed by the microcontroller

Brand: HBeonLabs, Product assembled by: HBeonLabs

 

 

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