I will show you how to turn the glass jar into a decorative solar lantern. I have designed a custom PCB for the project, so Xiaobai can be easily completed within one hour. The PCB can support various LEDs to achieve different effects. This is a cheap and easy way to add charm to any outdoor space. It can make beautiful light after sunset.
The solar cylinder is completely relying on the sun to power, which ultimately means that it can save you more energy, and you don't have to worry that it will pull out the plug once it is full, as long as the battery is fully charged, it will automatically stop Charge. Solar panels are for the sun, you can rest assured that it will charge and eventually provide a variety of lighting for your garden. Solar tank lanterns are equipped with a built-in sensor. Once the sun begins to fall into the horizon, it will automatically open, leave your garden, bring colorful rainbow light.
Components used:
Solar panel -2V
2. Controller QX5252F
3. 47 UH inductor
4. RGB LED
5. Sliding switch
6. 1N4148 diode
7. 0.1uf ceramic capacitor
8. AAA battery
9. AAA Battery Block
10. JST male prior
11. Double-sided tape
12. Mason
13. Candle flashing LED
14. Fairy tale string
15. PCB
Tools used:
Stripper clamp
2. Hot glue gun
Step 1: How to operate?
The heart of the light bulb is a very small four-legged IC QX5252F. Its working principle is very similar to the "Joule Thief" circuit.
However, the advantage of using this chip is that it does not require a bulky ring coil. It uses only a simple inductor, an AA / AAA battery and an LED to complete the same job.
The production circuit only needs an external inductor. The LED current can be changed by using a different value of the inductor. This figure is shown in the figure above. I used a 33UH inductor in the project.
Wiring:
Pin 1-> Solar panel positive terminal
Pin 2 -> A foot of the battery positive terminal and inductance
Pin 3 -> All ground (solar panel, battery and LED negative terminal)
Pin 4 -> Another foot of the inductor
Step 2: Modify the circuit
The original circuit given in the data table only uses the inductor as an external component to drive the standard LED. But it does not apply to RGB and several other types of LEDs. Therefore, I modified the circuit by adding a buffer circuit on the original circuit.
Before connecting the LED, the buffer circuit of the output is only a diode (1 N4148) and a capacitor (0.1uf). When the pulsation signal becomes 0 volts, the diode keeps the capacitor are charged.
After adding a buffer, you will notice that the RGB LED loop displays all 7 colors.
Step 3: PCB design
I designed a custom PCB for this project.
Step 4: Welding diode
For welding, you will need a good weighing iron, solder and a pliers. Excellent practice is to weld according to the height of the assembly. First weld a small height of components.
The soldering diode (1 N4148) replaces D1 on the PCB. The black band on the diode represents a negative electrode terminal, which is also indicated on the PCB.
You can use the following steps to weld all components:
1. Push the component foot into their holes and flip the back of the PCB.
2. Secure the tip of the soldering iron to the joint of the pad and component feet.
3. Send the flux into the joint to flow the flux to flow around the lead and cover the pad.
Once it flows around, remove the tip.
Step 5: Welding Induction
Welding 33UH inductance (1/2 watts) on the PCB instead of L.
First, the two legs are bent as shown above. The pin is then inserted into the PCB and finally welding.
Use clamps to cut excess legs.
Step 6: Welding capacitor
Welding a 0.1uf ceramic capacitor on the PCB instead of C1. This type of capacitor has no polarity, so no matter how welded, it will work.
After the welding capacitor, the excess feet are trified.
Step 7: Welding IC QX5252F
The heart of the solar lamp is IC QX5252F. It has a TO-94 package, four legs very close.
Therefore, when designing the PCB, I left a space between my legs.
One hand holds the IC QX5252F, and the two feet are slightly opened, as shown above.
The IC is inserted into the pcb marked with "QX5252F". Be sure to insert in the correct direction. The outline of the QX52525 is on the PCB to avoid confusion.
Then welcomes and trim the extra feet.
Step 8: Welding JST connector
I used two JST connectors to connect the battery and solar panels.
As shown, two JST (female) connectors are welded.
Polarity (+) marks on the PCB.
Step 9: Welding LED
Now you can store 5mm LEDs directly to the PCB. However, in order to test another LED, I sold a two-needle parent joint here. By using this feature, I can easily exchange between different types of LEDs.
In the next few steps, I will use the following LED to test:
Grass green LED
2. Coloring RGB LED
3. Candle flashing LED
4. Fairy tale string
Step 10: Slide the switch
The final step is to solder sliding switch. Insert it into the PCB labeled "Switch" and then weld.
Trim excess legs with pliers.
Step 11: Drilling on the lid
You must place the solar panel on the canopy. To penetrate the wires of the solar panel into the glass bottle, use the drill bit to make a hole.
The JST connector wire passes through the holder on the cover.
Step 12: Install the solar panel
The red wire is welded to the positive electrode of the solar panel, and the black wire is welded to the negative electrode of the solar panel.
The panel is then mounted on top of the cover using a double-sided tape.
Step 13: Install the battery holder
First, the battery holder is welded to the battery JST connector.
Use a heat shrink tube to insulate the solder joint.
The AAA battery holder is installed on the board.
Finally, connect the battery connector to the board. Insert the battery into the battery holder.
Step 14: Install the PCB
Align the board to the center of the can.
Use a double-sided tape to install the board.
The solar panel connector is then connected to the board.
Step 15: Charging the battery
Now slide the solar light switch to the ON position and put JAR in bright sunlight.
Solar cells will charge the battery.
Step 16: Test light bulb
In order to perform a quick test, insert the LED into the female connector.
Then slide the solar light switch to the ON position and covers the solar cell with hand. The indicator should open.
Here, I used 5mm strawhat LED. The output of the lamp is similar to the flashlight.
Step 17: Add more effects
You can use your own creativity to produce a variety of attractive results.
I installed acrylic cobblestones in the jar to get the flash effect.
Step 18: Add rainbow effect
Here, I have a two-pin RGB LED. Insert the LED into the female connector.
Then close the glass cap, enjoy a slow and fast color rainbow effect.
Acrylic cobblestones scatter light into different directions, which looks very attractive.
Step 19: Add candle flashing effect
Insert the flashing LED into the parent connector of the PCB.
Close the lid, observe the flicker.
Then I added acrylic cobblestone to obtain more attractive lighting effects.
Step 20: Add a fairy tale string
Initially, I am not sure if the PCB supports a fairy tale. But when I test it, I was really amazed. But I suggest you use too long strings because it may exceed the current processing capabilities of IC QX5252F.
First, I cut the fairy-like light string from the battery case. The insulating layer is then stripped from the terminal wire.
Then insert it into the female head to connect the LED. Put the lamp string into the tank to complete.
You can make some similar tins, then put them in the garden or lawn. Enjoy your new solar cylinder now.
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