Introduction: A Simple and Inexpensive LED's Arrow
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.
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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 firstname.lastname@example.org so I can help you, and send your tips and modifications. until the next. Bye!