BLINKING LED PCB CHRISTMAS TREE

Hello there

Finally, Winter is here. the most interesting thing in winter is Christmas at least for me. To celebrate Christmas I made a small PCB Christmas tree with blinking LEDs. We can use this to decorate walls and rooms. So in this tutorial, I am showing how I designed and made this PCB Christmas tree.

Let's start with the circuit here you can see the circuit I used ic 555 for this project the circuit is an astable multivibrator. That makes the blinking of LEDs. After verifying the circuit, I converted that into a PCB. first I have drawn a tree outline like this. Then I placed all components inside the outline and made a simple tree PCB.

Then I generated the Gerber file for PCB fabrication. After downloading the Gerber file I went to jlcpcb.com for PCB fabrication. I choose JLCPCB because they offer only 2$ for 5 PCBs. To order PCBs just click order now and upload the Gerber file then we can select the quantity, solder mask colour, thickness etc. here I choose .4mm thickness to reduce the weight and for better diffusion. after that select the shipping method and place the order. After two weeks I received the PCBs. PCBs looks pretty nice and also the quality is perfect

NE555D SMD *1

transistor 2N2222 SMD *1

resistor SMD 0805 100 *1

resistor SMD 0805 1k *1

resistor SMD 0805 22k *1

resistor SMD 08055.6k *1

BATTERY CR2025 holder *2

Capacitor 10uf - 0805 *1

Capacitor .10uf - 0805 *1

1N4148_SMD *1

2pinMale *1

led smd 0805 *16

Now I grabbed all components and started soldering. I started by soldering the 555 ic then I soldered all other components. After 30 minutes I finished the soldering job and now our PCB Christmas tree looks like this. We can power this by two modes. Either you can use two 3v batteries or you can directly input 5-12volt.

Similarly, I made 3 trees. And I placed all the tress on a breadboard and gave power now see the working we can change the blinking duration by changing the capacitance value. happy Christmas to all. I will see you next time.