Saturday, January 24, 2009
Starting to Electronics Blog
The world is moving ahead. In this time Electronics has become undivided to our modern and comfortable life. Modern world depends on Electronics. It has so much branches. As it is a blog for discussing about Electronics, Now I want to describe you some plans and projects about Electronics. Mainly, this projects are based on IC 555, you will have some descriptions about this IC as well as several projects. The projects are easy to build and nice to use. This matchines help to make comfort our life. Though this matchines are small but they help to remove odds which hampers ours comfort in life
Block Diagram of "555 TIMER IC"
555 TIMER
555 Timer is a very popular integrated circuit which is used in both the analog and digital circuits. Its input and output are compatible in the CMOS as well as TTL logic circuits when it is operated on 5V supply. This TIMER IC can be used in both the mono stable and as table modes.
555 Timer is a very popular integrated circuit which is used in both the analog and digital circuits. Its input and output are compatible in the CMOS as well as TTL logic circuits when it is operated on 5V supply. This TIMER IC can be used in both the mono stable and as table modes.
Simple Telephone Call Recorder
This circuit can be used to record the conversation on the phone in a cassette recorder. You can connect this circuit between the telephone and a cassette recorder. Whenever the handset is lifted then the green LED is turned ON and it results in a reduced value of the resistance. In this way IC 555 is triggered and the relay connected in the circuit is switched ON through a transistor connected at its output. This causes the supply to reach the cassette recorder. Both side recording in the cassette is possible by using this circuit.
When the telephone rings on an incoming call then both the LED s turn ON/ OFF. In this way the LDR receives continuous light by which the IC 555 gets the triggering volts. The transistor switches ON the relay. If the call remains unattended then the relay will switch OFF automatically after 10 seconds. If the telephone is attended during this time then the conversation will be recorded.
It is to be ensured that the cassette is loaded in the cassette recorder and the recorder is kept in recording position.
This circuit can be used to record the conversation on the phone in a cassette recorder. You can connect this circuit between the telephone and a cassette recorder. Whenever the handset is lifted then the green LED is turned ON and it results in a reduced value of the resistance. In this way IC 555 is triggered and the relay connected in the circuit is switched ON through a transistor connected at its output. This causes the supply to reach the cassette recorder. Both side recording in the cassette is possible by using this circuit.
When the telephone rings on an incoming call then both the LED s turn ON/ OFF. In this way the LDR receives continuous light by which the IC 555 gets the triggering volts. The transistor switches ON the relay. If the call remains unattended then the relay will switch OFF automatically after 10 seconds. If the telephone is attended during this time then the conversation will be recorded.
It is to be ensured that the cassette is loaded in the cassette recorder and the recorder is kept in recording position.
Music By Light
The circuit given here generates music in tune with the light.
One IC 555 is used as an table multi vibrator although. We can also use two transistors in place of this IC as shown in figure. In both the circuits one LDR is used. As light falls on LDR of both circuits, current begins to flow. The value of this current, depends upon the intensity of light falling on the LDR.
IC 555 produces audio- frequency according to flow of current and we can hear panoramic sound and music.
The circuit given here generates music in tune with the light.
One IC 555 is used as an table multi vibrator although. We can also use two transistors in place of this IC as shown in figure. In both the circuits one LDR is used. As light falls on LDR of both circuits, current begins to flow. The value of this current, depends upon the intensity of light falling on the LDR.
IC 555 produces audio- frequency according to flow of current and we can hear panoramic sound and music.
Automatic Night Lamp
The circuit given here automatically switches ON lights in your home as soon as the sun sets and also switches OFF the lights on sun rise.
This circuit uses IC555, LDR, 0-9 Volt transformer and IC AN7808. When light falls on the LDR then its resistance decreases which increases input supply of IC 555 by which high voltage appears on its output pin. Hence, the relay stops functioning by which the connected bulb is automatically switched OFF. When light stops falling on LDR then reverse process will take place and bulb is automatically switched ON.
The circuit given here automatically switches ON lights in your home as soon as the sun sets and also switches OFF the lights on sun rise.
This circuit uses IC555, LDR, 0-9 Volt transformer and IC AN7808. When light falls on the LDR then its resistance decreases which increases input supply of IC 555 by which high voltage appears on its output pin. Hence, the relay stops functioning by which the connected bulb is automatically switched OFF. When light stops falling on LDR then reverse process will take place and bulb is automatically switched ON.
RINGING BELL INDICATING SUNRISE
The given project can be used to ring a bell as soon as the sun comes up in the morning.
In this circuit one IC 555, along with a LDR and a relay is used. A bell is used with the relay switch, which is operated at 220V AC. The circuit is operated by +9V supply. As soon as the sun rises then light fall on the LDR which gives trigger voltage at pin no.4 of the IC 555 and switches ON the transistor TR1 by which the relay will operate and bell will start ringing.
The given project can be used to ring a bell as soon as the sun comes up in the morning.
In this circuit one IC 555, along with a LDR and a relay is used. A bell is used with the relay switch, which is operated at 220V AC. The circuit is operated by +9V supply. As soon as the sun rises then light fall on the LDR which gives trigger voltage at pin no.4 of the IC 555 and switches ON the transistor TR1 by which the relay will operate and bell will start ringing.
Parts List::::
IC 555, Tr. BEL 127
Relay 6V, 150E,
LDR
Electronic BellResistance: 100K, 330E, Control 2K2
IC 555, Tr. BEL 127
Relay 6V, 150E,
LDR
Electronic BellResistance: 100K, 330E, Control 2K2
TURN INDICATOR
The circuit given here can be used as a turn indicator which you can connect to your vehicle.
In this circuit IC 555 is used for frequency oscillation. When we keep switch S1 in center position of 1-pole 3 way switch then both indicator bulbs remain in OFF. When the switch S1 is brought in left position then left indicator blinks and when the switch S1 is brought in right position then right indicator blinks.
The circuit given here can be used as a turn indicator which you can connect to your vehicle.
In this circuit IC 555 is used for frequency oscillation. When we keep switch S1 in center position of 1-pole 3 way switch then both indicator bulbs remain in OFF. When the switch S1 is brought in left position then left indicator blinks and when the switch S1 is brought in right position then right indicator blinks.
Subscribe to:
Posts (Atom)