Daisy’s Dock Lamp
Daisy’s Dock shone across the bay to West Egg. The slow flashing green beacon switched on and off every few seconds to guide boats in. A sort of domestic LightHouse.
In this example we use a twin coil suppression coil wired together to form the Joule Thief. This is driven hard by a small resistor to the transistor to give a strong current to its output which is then regulated to 5v.
The output is fed to a 555 IC timed to roughly 3 seconds on with an almost 50% duty cycle.
The light is extremely bright and can be seen over 200 meters away.
The 555 is not known for its efficiency and will drain the single AA battery in under a week. The same circuitry could be better designed using other IC choices but for the sake of simplicity we stuck to the 555 here.
The light shows a simple example of using a 5v circuit at 1.5v.
This project will soon be available to buy as a kit. Please visit the store to purchase.
