I do not have an electrical background, but wanted to make my own navlites. I did some searching on the net and found a circuit design for a two LED flasher. I modified the circuit for a single LED flash and added non-flashing wingtip lights and landing lights.

The Circuit

R1, controls the brightness of the strobe light.
R2 and C1 controls the time the strobe light is on.
R3, R4 and C2 control the time the strobe light is off.
R5, limits the volt on the diode.
R6 controls the brightness of the wing tip lights.
R7 controls the brightness of landing lights. The LEDs have a high enough rating to work without a resistor when wired in series, but I found them to be warm to the touch, so I added it.
Q1 and Q2 do the switching of the strobe.
As I stated before, I modified a dual LED flasher circuit I found on the net. I simply replaced one of the LEDs with a Diode I had.

Parts List and Pricing

R1 300 ohm .50 (Q 10)
R2 8.2 k .50 (Q 10)
R3 6.8 k .50 (Q 10)
R4 68 k .50 (Q 10)
R5 300 ohm .50 (Q 10)
R6 150 ohm .50 (Q 10)
R7 22 ohm .50 (Q 10)

D1 1N4148 .75 (Q 15)

Q1 2N3904 .75 (Q 5)
Q2 2N3904 0

C1 10 nano .10
C2 10 nano .10

LED 1 White 3000 mcd 20ma 3.5v 2.00
LED 2 Green 3000 mcd 20ma 3.5v 2.85
LED 3 Red 2000 mcd 20ma 2v 1.00 (Q 2)
LED 4 White 10,000 mcd 100ma 5v 2.50
LED 5 White 10,000 mcd 100ma 5v 2.50

9v battery clip 1.50 (Q 3)
Solderable Perf Board .75
4 pin board mount female phone jack 1.00 (Q 5)
4 pin crimp-on modular phone plug 2.50 (Q 10)

Total 15.55


I purchased most items at All Electronics.
The two 10,000 mcd white LEDs I got at Frys

I did not include the price of wire (I used 22 gauge), solder or tools
or shipping if you order online. I am fortunate to live near both stores.
When I made mine, I used 4 pin handset plug and jack. I don't recommend using the handset plug and jack only because finding a crimp tool for it is problematic.

The other items that I did not price out, was the cost of shrink tubing as I had bought a variety pack from All Electroincs about a year ago. I cover the entire circuit board in some larger diameter shrink tubing too.
I cut it off for the photos. It might be possible to use a rubber coating or some type of RTV to cover it. I suppose one could make some type of enclosure too.


Scott