This lamp is very useful for, in addition to lights of security that should bring the bike under seat, cyclist have again in the back of the helmet on his head, and thus better their identification by drivers and other transport.
It requires that the person who wants to build this device, have basic electricity, electronics and safety knowledge, as well as, you possess a soldering iron pen, welding and solder paste, an arc with blade and a hand drill.
Electronic devices and the small 12V battery you can get in a store of electronics (such as STEREN, for example), the tube and PVC covers is achieved at any hardware store.
Step 1: Parts
• Electronic and hardware:
3 LED 5 mm flashing
1 switch SPST miniature
1 100 ohm resistance
1 battery 12V type 23A
1 ½ " pipe 3 cm long
2 ½ “ cover PVC
Solder and paste
1 drill 3/32 "
1 piece of sandpaper
1 soldering pencil
Tip tweezers and screwdriver
Small hand 1 drill
Bow with hacksaw
Step 2: Cut Tube and Caps
Step 3: Drill Pipe PVC
Must also make 3 holes of the same diameter for the pins of the switch (although we will only use 2 terminals, the third gives a better locking switch miniature).
Step 4: Weld the LEDs and the Switch
They are welded according to the presented diagram.
Step 5: Installation of the Battery in the Lamp.
You must move the switch to check that the LED’s works correctly.
Step 6: Put the Lamp in the Helmet.
IMPORTANT NOTE: In case of not knowing how to use the hand drill or the soldering pencil and the bow with hacksaw, please consult with any person who knows about it to handle, to avoid an accident in your person.
Good luck in making this lamp, and I invite you to hop on your bike and pedal on the night walks that surely are organized in your city, to keep us healthy and happy.