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The circuit we describe an arrow of LED's that can be used in the car, the bicycle and several things that you imagine. The cost is very low, and even more difficult.
The circuit is based on an analogue oscillator and arrow of LED's.
The oscilator use four pieces, and the arrow ten pieces.
Lock the pictures.

Step 1: Take the Parts

These are the parts:

Q1 - 01 transistor BC 548 (NPN, general use, silicon)
Q2 - 01 transistor BC 558 (PNP, general use, silicon)
D1,D2,D3,D4,D5,D6,D7,D8,D9,D10 - 10 Common LED red, yellow or green (I use the red)
R1 - 01 resistor, 1 megaohm x 1 / 8 w
C1 - 01 to 10 microfarads electrolytic capacitor x 16 V
B1 - 02 cells in series with low-battery.

Step 2: Finish

Especially when I prefer to mount the circuit in protoboard first and then use the PCB. Here are some tips:

-mount the arrow on a separate card if you use as flag
-mount the arrow on the plate if using as a flag in hand.
-use high-brightness LED's for better signs.

The assembly and simple, and hard mistake. If you have problems, send an email to stephen_web@hotmail.com so I can help you, and send your tips and modifications. until the next. Bye!
<p>Great!! Do you have a video of it actually working?</p>
<p>No. I'm sorry :c</p>
You could also probably make something using red lightbulbs, or 10mm LED's to make it like a real arrow sign. If you put a lot of red 10mm LED's on together, you can make it a larger sign. But you will need to increase the power and components to something that can handle that much electricity. An inverter is probably needed.
good idea
Yes, I use ubuntu =D<br/>
Ubuntu

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Bio: A boy that loves aviation, music and electronics
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