Introduction: DIY Long Battery Life Bicycle Indicators
LONG BATTERY LIFE. Circuit is completely turned off when not blinking.
ULTRA BRIGHT LED's
CHEAP, UNDER 20 BUCKS
VERY SMALL CONTROLLER BOX AND WIRING
WORKS ON A SINGLE 9V BATTERY
Step 1: Video
Step 2: Parts List
2 x LED's (I used car LED's working on 12v that I found in a car parts shop for under 5 bucks)
9v battery connector
Small solder board
555 timer ship + socket
2 x 240 Ohm resistors
1 x 100 Ohm resistor
1 x 500 Kilo Ohm resistor
1 x 270 Kilo Ohm resistor
1 x diode 1n4148 or 1n4001 (most standard diodes will work)
1 x capacitor 100 micro farad
1 x capacitor 1 micro farad
1 x capacitor 10 nano farad
Housing (for circuit and battery)
Step 3: Putting It Together
Solder everything together on the solder board.
If you use ready-to-use LED's, you have to bridge the resistor in the LED casing.
Step 4: Circuit Ready
When you soldered everything together, it's time put it in the housing.
It should look something like this.
Step 5: Final Notes
I made this circuit as a request of a friend.
He painted the indicators and mounted them to his bicycle.
He is making a step by step tutorial on how he mounted the blinkers on his bike. This will soon appear on the website.
To see updates and more info on this project, please visit the website at
Please leave suggestion and comments below.
Thanks for reading,