Introduction: How to Make a Fast Blinking LED Bike Light
In this Instructable I will show you how to make a simple fast blinking LED light that you can attach to your bike or any where you want. It blinks more than 3 times in a second.
It is cheaper to make one than to buy one.
You can make it whit your favorite LED color,red,green,blue,yellow,RBG...
This was my first electronic project, so I recommend it to all beginners in the interesting field of electronics.
This bike light is easy to make,looks cool and most importantly, effective!
Step 1: Components
For your fast blinking LED you will need:
1. LM 555 timer chip
2. 180 K ohm resistor
3. 330 Ohm resistor
4. 0,22 uF, 16V or 100V capacitor
5. 9V battery snap
6. 9V battery
7. LED (go to step 2 so I can help you choose which one)
8. Circuit board
9. Plastic housing for electronic circuits
10.Switch
(ALL OF THIS COMPONENTS CAN BE BOUGHT AT YOUR CLOSEST ELECTRONIC COMPONENTS SHOP,RADIO SHACK STORE.)
Step 2: Choosing the LED
There are lots of LEDs out there. 10mm,8mm,5mm,2mm,red,blue,green,yellow,UV.......
For this project I suggest 10mm LEDs, which color is up to you.
Here you can buy LEDs
http://www.phenoptix.co.uk/
Step 3: Tools
You are going to need some tools to do this project:
1. Soldering Iron
2. Solder
3. Vacuum for desoldering (just in case)
4. Wire cutter
5. Wire insulation stripper
6. Scalpel
7. Sand paper
8. Screwdriver
9. Telephone wire
10. Something to make a hole in the plastic housing (a drill)
Step 4: Makeing the Circuit Board Fit
Cut the circuit board so it can fit inside your plastic box. Use the wire cutters or a scalpel.
WARNING: SCALPELS ARE SHARP, BE VERY CAREFUL!!!
Step 5: Cut the Plastic Box
Peel of some of the plastic on the side (the longer side) of the plastic box. Use the scalpel and the sand paper. The opening should be 1mm wide, just for the wire from the LEDs.
Step 6: Make a Hole
Make a hole on the side of the box. The hole is for the switch. Use a drill or anything that can make a hole.
Step 7: The Electronic
OK. First I will give you the schematic, electronic plan, and in step 8 i will explain it.
Step 8: Connecting It All Together
Solder the 9 V battery connector where the battery is shown, with the negative (black) wire to pin 1 and the positive (red) wire to pin 8. We'll refer to these points later as "Ground" and "+9 V" (photo 1 and 2)
Pin 8 is connected to pin 7 through a 180 kilo-ohm resistor, and pin 7 is connected to pin 6 through a second a 180 kilo-ohm resistor. (photo 3 and 4)
Use a telephone wire to connect pin 2 to pin 6. (photo 5)
The 0.22 uF capacitor connects pin 6 to pin 1. (photo 6)
Pins 4 and 5 should be left unwired.
Pin 3 is our "clock" output
Solder the LEDs to the board and connect them together. Example: If you have 6 LEDs the positive (+) pin of LED 1is connected to LED 6 through the positive pins of LEDs 2,3,4 and 5 to the 6th LED (photo 7)
Take the output from the 555 (pin 3) and connect it to the positive side of the LED, through a 330 ohm resistor, and then to the ground (-).
Step 9: Attach the Switch
OK. You are all most done. Now attach the switch. Cut the wire from the battery snap, peel of 1mm of the wire on both sides and connect it to the switch.
Step 10: Put It All Togother
Push the switch through the hole in the plastic box, attach the board to the box and close it.
Step 11: THE FAST BLINKING LED BIKE LIGHT IS FINISHED
It is finished. Go ahead and attach it to your bike or what ever. Hope you enjoy my Instructable. Go easy on me, this is my first. Please leave a comment.
193 Comments
12 years ago on Step 11
I'm thinking of making, like, making arrows on the back of a jacket for turning signals when biking. How would I figure out the resistor values for the 5mm leds on ebay I would buy?
Reply 12 years ago on Step 11
To start with dont touch Ebay LED's they are very poor and not worth bothering with for safety lights go to a good retailer and pay around $1 per LED much better brighter and last longer MUCH longer if you want resistor values google there is a page out there with a formula to calculate this just can not remember where it is sorry
Reply 6 years ago
E-Bay/Amazon resellers usually buy the cheapest LEDs from China.
I live in VietNam and the cheapest (ungraded) LEDs are sold by the kilogram, as are the lowest quality graded LEDs.
The best quality are graded and sold by the 'each' price. Bright Red 3mm LEDs are going for 10 for USD$00.01 (1 cent) today.
Reply 11 years ago on Step 11
WTF! i buy all my LEDS from ebay. most retailers also get LEDS from same or similar manufacturers as ebay sellers.
and seriously $1 per led... i buy 20 at that price.. if 18 of them die ive still saved money!
Reply 11 years ago on Step 11
BTW.. Ive never had any die unless i was doing something stupid with them e.g. 5v into a 3.6v led
Ive used quite literally 1000's over the years
I started when ebay led's were 70c each
Reply 11 years ago on Introduction
u pay $1 for LEDs?!?!? WOW! to me, even $0.50 is OUTRAGEOUS! i searched the internet top to bottom to find the cheapest LEDs. finally, i found www.TaydaElectronics.com this website had: LEDs, Resistors, Prototyping Boards. Capacitors, and WAY more. the AMAZING thing about this website is that LEDs are anywhere from $0.02 to $0.06. Although the items you order are coming from Bangkok, the shipping is EXTREMELY fast and cheap.
I just wanted to let you guys know, that way you can buy more for less.
Reply 12 years ago on Step 11
Depend on what circuit you use?
If you are using my circuits, the resistor values are the same...
I think you have an Instructables just for the project that you mentioned.
6 years ago
I made this and fitted it to my motorcycle helmet so even crazy Vinasun taxi drivers can see someone is in front of them!
6 years ago
How can i turn it into a 5v supply circuit ? i wish to use it on a usb power bank.
6 years ago
nice
8 years ago on Introduction
can we slowdown the time of the blinking of L.E.Ds.
I made it but its too fast !!
Reply 6 years ago
please explain to me how you made it!! please I'm begging you!
7 years ago
Can I connect 4v rechargeable battery
7 years ago
WOW NICE
8 years ago on Introduction
i wanted to ask that why 5mm res and blue LEDs don’t glow simultaneously when connected together but glow perfectly when connected individually. i need an awnser fast please..
Reply 7 years ago on Introduction
Ok so the reason the 5mm res and the blue LEDs wont glow simultaneously, I've had the same issue. its the voltage the two different LEDs need aren't the same. I don't get why but that's just how they are made. So i got this box of LEDs and so all the LEDs worked fine except for the yellow and the red LEDs. Later on I figured out the yellow and red LEDs work on 2.2 volts. the others LEDs were on 3 volts. So the two LEDs work on separate voltages so it "Trips" the timer and doesn't blink at the right time. Hope that helps! Sorry its been a Year XD
8 years ago
plz can i use a 0.47 uf capasitor? ???
10 years ago on Step 7
its realy good
10 years ago on Introduction
Can you please upload video so that we can see how it looks while blinking?
10 years ago on Introduction
Could I use Texas instrument tlc555ip timer chip instead?