Synchronized Flashing of LEDs

@Rayin"S" posted:

I am just wondering if anyone built this circuit to see if it works, I've built a couple that were posted on line only to find they don't work.

Ray

Well, I can answer my question, I built this circuit using components close to the recommended specs. This was put together on a powered breadboard, I did reverse the one LED as John recommended and it works. I ordered parts to build several of these, thank you for posting this circuit.

Ray

Glad it worked, I knew that LED had to be wrong, but it was close.

I always look for your input on electrical matters.

Ray

@gunrunnerjohn posted:

Glad it worked, I knew that LED had to be wrong, but it was close.

You can get 5 alternating flasher module kits for $8.85 shipped from China (eBay item number:165117958891)

But you would need to adjust values of resistors and/or capacitors to change the rate.

For those who don't want to take the time to assemble a board, for $8.99 plus $2 shipping from California you can get 2 adjustable rate alternating flasher units (eBay item number:392900420800)

Bob

I finally finished my 6517 caboose with the synchronized flashing red lights.  I have a short video at the end for proof!  The hardest part was masking the flash from showing inside the caboose.  I took out the big clear plastic lens, put in thin sheets of plastic for the windows, added some overhead LEDs, and then put in some little people.

I used the Evans design flashing lights, but a word of caution.  They shrink wrap the connection, but the wires are not securely in that wrap (the wrap has to big enough to cover the electronics, and the wire is much smaller).  I've had wires come loose in 3 units.  I did mention it to Evans, and they did replace it even though I said it was my fault.  When the last one happened, I started adding shrink tubing to the wire connections to make them more secure.  It makes the whole thing more rigid, but it hasn't come apart.