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
I made this circuit as a request of a friend.
After a week or so the first prototype was ready. But I was not very happy with it.
To use the indicators you had to turn on the circuit before your trip and turn the circuit off after the trip. The circuit was drawing electricity from the battery the whole trip and when you forgot to turn off the circuit after the trip, the battery would be death the next day.
The circuit was sitting on my desk for 6 months before I started to make some improvements to it.
I contacted a friend who is a Master in electronics to have a look at the circuit. Together we came up with what the circuit is now... a hassles free indicators kit with a long battery life and a small controller box working on a single 9 volt battery.
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)
When dark, indicators work in relation to another light. In this case a center light.
Here is a picture how my friend uses his normal light together with his indicators.