Bc 547 Led Chaser | How to Make a Led Chaser|

This is the making of a LED chaser which is based on a NPN transistor(bc547) and some bunch of other commonly hardwares such as resistors and capacitors

1. bc 547 (NPN transistor)
2. 9 pc blue led (5mm/3mm)
3. 10 kilo ohms resistor (0.25w)
4. 22 ohms resistor
5. 100 uf capacitor
6. 19 SWGcopper wire
7. breadboard
8. enamelled copper wire

so i have made tthis flasher to work in 12volts but you could also make this project in 5v which is more convinient to work with

MAKING THE LEB BAR

The led bar is made out of 9 pieces of 5mm blue colour led (colour coes not matter)

• all the negative terminal of the led are also connected to the negative terminal ( the base )
• connect the LED into pairs of three and connect seperate wires for them

THE CIRCUIT MAKING

the whole base as the ground terminal

• connect emittor ( 3rd pin ) of the three transistors to ground
• connect 10 kilo ohms resistors to the base (2 nd pin ) of the three transistors
• connect 100 uf capacitor's negtive to base of the three transistors
• connect 22 ohms resistors to collector pin (1st pin ) of the three transistors
• connect the positive terminal of the capacitors to the proceeding transistors collector pin (1st pin )
• connect all the resistors un connected end together asit is the positve terminal of this led flasher
• connect the positive part of every led set to the collector pin ( 1st pin ) of the three transistors

the circuit is complete now

now we have tho solder the led bar to the copper frame

all our circuit is done i've made the 12v version the circuit diagram above is for making it in5v

"do make the design identical or you could change the design as your wish ."