Smoke Alarm
In this project a smoke detection alarm system is discused. The optical sensor consists of an IR diode and a photodiode with a small gap in between. During normal condition the photodiode is receiving the IR signal from the IR diode. The photo interrupter module is used as the smoke detector, while timer 555 is wired in astable
Digital Voltmeter Using 8051
Thursday, 4 April 2013
Digital Voltmeter Using 8051
This article is about a simple 0-5V voltmeter using 8051. This digital voltmeter has a sensitivity of 200mV which is a bit low but this project is meant for demonstrating how an ADC and seven segment display can be interfaced to 8051 to obtain a digital readout of the input voltage. ADC0804 is the ADC and AT
Water Level Indicator
Thursday, 14 March 2013
Water Level Indicator
Description:
This is the circuit diagram of a simple corrosion free water level indicator for home and industries. In fact the the level of any conductive non corrosive liquids can be measured using this circuit. The circuit is based on 5 transistor switches. Each transistor is switched on to drive the corresp
Resistor Colour Coding
Wednesday, 13 March 2013
Resistor Colour Coding
Resistor's Look:
1st Band - It tells the first significant value
2nd Band - It tells the second significant value
Multiplier -It simply tells the number of zeros
Tolerance -It tells the tolerance of the resistor
Colour's Values:
The Values of colours can be seen from the imag
Off Topic-No Arms No Legs No Wories(Must Watch)
Wednesday, 13 March 2013
Nick Vujicic-An Inspiration (Must Watch)
Words cant describe about him click the link to see it yourself-http://www.youtube.com/watch?v=ciYk-UwqFKA
Game Timer
Wednesday, 13 March 2013
Game Timer
About The Project:
The complete circuit diagram for the simple Games Timer is shown in Figure below.Essentially, it comprises one building block based on a single 555 timer IC (integrated circuit), wired as a monostable. The circuit produces an audio alarm after a preset time delay.
Circuit Diagram:
Working:
Push switch S2 i
Digital Stop Watch
Wednesday, 13 March 2013
Digital Stop Watch
About The Project:
A digital stop watch built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7-segment LED display. MM74C926 consists of a 4-digit counter, an internal output latch, npn output sourcing drivers for common cathode, 7-segment display and an internal multiplexing circuitry with fou
Burgular Alarm Using IC555
Tuesday, 12 March 2013
Burgular Alarm Using IC555
Abstract:
This circuit uses an IC555 timer. I.C 555 is connected as comparator with pin 6 connected with positive supply, the output goes high-1 when the trigger pin 2 is at lower than 1/3 level of the supply voltage. The output goes low-0 when it is above 1/3. So small change in voltage of pin 2 is enough to
Convert Salt Water To Pure Water
Tuesday, 12 March 2013
Convert Salt Water To Pure Water
About The Project:
Abstract
Nowadays, water is becoming a big problem allover the world. The demand for the drinking water is keeps on increasing. This is a project to convert the salt water into drinking water. By using this type of project, we can reduce the demand for the drinking water. In future by improv
Air Flow Detector
Tuesday, 12 March 2013
Air Flow Detector
About The Project:
This circuit can give a visual indication of the rate of air flow.It can be also used to check whether there is air flow in a given space.
The filament of a incandescent bulb is the sensing part of the circuit.When there is no air flow the resistance of the filament will be low.When there is air flow th
Automatic Street Light Control
Tuesday, 12 March 2013
Automatic Street Light Control
About the Project:
The circuit diagram present here is that of a street light that automatically switches ON when the night falls and turns OFF when the sun rises. In fact you can this circuit for implementing any type of automatic night light.
The circuit uses a Light Dependent Resistor (LDR) to sens