✦Step 1:-Solder 5pcs BC547s together like this.
✦Step 2:-Solder 10K resistors in the middle of the connected pins.
✦Step 3:- Solder all the resistors together.
✦Step 4:-Connect the positive pole of the 470uf 50V capacitor to BC547 and connect the negative pole to10K resistor.
✦Step 5:-LED positive pole is connected to 220 ohm resistor.
✦Step 6:-LED negative is connected to BC547.
✦Step 7:-Connect all 220 ohm resistors together.
✦Step 8:-Connect 10K resistor to 220Ω resistor with 4007.
✦Step 9:- Connect a 2.2K resistor in parallel at both ends of the 4007.
✦Step 10:- Connect a wire to the first negative electrode of BC547, it is the negative pole of the power supply.
✦Step 11:- Connect a wire to the positive pole of the power supply in a 220 ohm resistor series circuit.
✦Step 12:-Prepare a NE555P, connect pin 4 to pin 8 with a jumper wire.
✦Step 13:-NE555P, pin 2 is connected to pin 6.
✦Step 14:-NE555P, pin1 and pin2 are connected to 100u f50v capacitor, positive pole is connected to pin2.
✦Step 15:-1K resistor is connected to the pin7 and pin8 of NE555P.
✦Step 16:-10K resistor is connected to the pin6 and pin6 of NE555P.
✦Step 17:-Connect the wires of the BC547 circuit to the NE555P circuit. Connect the positive pin to pin 4 and the negative pin to pin 3.
✦Step 18:-9V DC power supply. The positive pole is connected to the NE555P pin 8 and the negative pole is connected to the pin 1.
『5pcs BC547』 view more ⇒https://www.utsource.net/sch/BC547
『10K resistors 』 view more ⇒https://www.utsource.net/sch/10K%20resistors
『 470uf 50V capacitor 』 view more ⇒https://www.utsource.net/sch/470uf%2050V%20capacitor
『220 ohm resistor』 view more ⇒https://www.utsource.net/sch/220%20resistor
『LED 』 view more ⇒https://www.utsource.net/category/led-lighting-1.html
『NE555P』 view more ⇒https://www.utsource.net/itm/p/1273434.html
『1K resistor 』 view more ⇒https://www.utsource.net/sch/1K%20resistor
『9V DC power supply』
Video on Yotube: