12 volt dc table fan 🤔kaise banaen रिचार्जेबल फैन dc मोटर से चलने वाला 1500 रु. बचाओ।

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Building a 12-volt DC rechargeable fan can be a rewarding project if you're familiar with basic electronics. Below is a simplified guide to help you create one.
Materials Needed:
1. **12V DC Fan**: You can use a 12V computer cooling fan or a 12V desk fan.
2. **12V Rechargeable Battery**: Choose a suitable battery, like a sealed lead-acid (SLA) or lithium-ion battery.
3. **Battery Holder/Case**: To secure the battery.
4. **12V Solar Charge Controller (optional)**: If you want to charge via solar power.
5. **12V DC Charger**: To recharge the battery from a wall outlet.
6. **DC Power Jack/Plug**: For connecting the charger to the battery.
7. **Switch**: To turn the fan on and off.
8. **Wires and Connectors**: For connections between components.
9. **Heat Shrink Tubing or Electrical Tape**: For insulation.
10. **Soldering Iron and Solder**: For making permanent connections.
11. **Enclosure**: To house the components (optional).
Tools Needed:
- Soldering iron and solder
- Wire strippers
- Screwdrivers
- Multimeter (optional for testing)
Steps:
1. *Prepare the Fan:*
- If you're using a computer cooling fan, identify the positive and negative wires. The red wire is usually positive (+), and the black wire is negative (-).
2. *Connect the Battery:*
- Secure the battery in the holder or case.
- Connect the positive terminal of the battery to the positive wire of the fan.
- Connect the negative terminal of the battery to the negative wire of the fan.
3. *Install the Switch:*
- To add a switch, cut the positive wire leading from the battery to the fan.
- Solder one end of the cut wire to one terminal of the switch.
- Solder the other end of the cut wire to the other terminal of the switch.
- Insulate the solder joints with heat shrink tubing or electrical tape.
4. *Connect the Charger:*
- Solder the DC power jack to the battery terminals, observing polarity (positive to positive, negative to negative).
- This jack will be used to connect the 12V DC charger to recharge the battery.
5. *Test the Circuit:*
- Before closing the enclosure, test the circuit by turning on the switch. The fan should run if everything is connected correctly.
- Also, check if the battery charges when the charger is connected.
6. *Enclose the Circuit:*
- Once you're satisfied that everything is working, place the components in an enclosure if desired.
- Ensure there is ventilation for the fan and any heat generated by the battery or circuit.
7. *Optional Solar Charging:*
- If you want to add solar charging, connect a 12V solar panel to a solar charge controller, and then connect the controller to the battery. This will allow you to recharge the battery using solar power.
Safety Tips:
- Ensure correct polarity when connecting the battery, fan, and charger.
- Use a fuse in the circuit for added safety.
- Avoid short circuits, as they can damage the battery or other components.
- Do not overcharge the battery; consider using a smart charger that stops charging when the battery is full.
This basic setup will give you a functional 12V DC rechargeable fan. You can customize the design by adding features like multiple speed settings or using different types of fans and batteries based on your requirements.
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