You may have heard or seen that how to control household devices with Radio Frequency (RF) and Infra Red(IR) but these techniques are little complex and cost more time and Money, now i got to have a idea to control devices with Laser Diode that can be easily bought from the toy store.
All you need to have following components
1. Semiconductor Laser Diode
2. LDR ( Light Dependent Resistor) or Photo-Diode
3. A suitable transistor for Signal amplifiation
4. A Relay either Solid state or Mechanical
5. Wires
6. Breadboard for test
Circuit Diagram that i have created with the help of Proteus
In On Condition
Here you may notice when The Light source is quiet near to the LDR its resistance decreases drasticallly and current reaches to the base of transistor ultimately connects collector and Emitter terminal and and hence the Led attached to the Collector glows.you can see in the Circuit diagram i have attached three Green LEDs that are glowing as high intensity Light fall on it.
You can amplify that voltage | Current that are going into the LED and Can attach Relay for Controlling Household Devices.
You can write to me in case of difficulty
All you need to have following components
1. Semiconductor Laser Diode
2. LDR ( Light Dependent Resistor) or Photo-Diode
3. A suitable transistor for Signal amplifiation
4. A Relay either Solid state or Mechanical
5. Wires
6. Breadboard for test
Circuit Diagram that i have created with the help of Proteus
Circuit Diagram for Laser Controlled devices( Off State of Laser)
In On Condition
Here you may notice when The Light source is quiet near to the LDR its resistance decreases drasticallly and current reaches to the base of transistor ultimately connects collector and Emitter terminal and and hence the Led attached to the Collector glows.you can see in the Circuit diagram i have attached three Green LEDs that are glowing as high intensity Light fall on it.
You can amplify that voltage | Current that are going into the LED and Can attach Relay for Controlling Household Devices.
You can write to me in case of difficulty
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