electronics supply

DigiKey, Jameco and Mouser are good source for components.

Let us know the progress on that project.

Larry

All electronics. ordered there many times.  no complaints

Thanks guys--I 'm going to try Digikey because three of the important parts

are digikey parts -- However I'm going to store all three in my favorites

one of them has to work

Thanks

JOHN G

forgot one ( all electronics)

As TrainLarry says above, DigiKey is my favorite and where I get almost all my electronic items. Then the other two Jameco and Mouser. DigiKey is very fast and if you use USPS first class shipping it is very reasonable.

I also get many items from ebay, they are really inexpensive and many have free shipping from China. Only drawback is delivery time, usually about 10 days to 2 weeks or possibly longer. Definitely worth a look.

As soon as I can get the parts I'll let how it all works out

JOHN G

I would like to build the E R's solid state post war relay replacement.

Sorry, guys, I must be 10 steps behind...

What is "the E R's solid state post war relay replacement"?  Who is "E R"?

I would love to follow suit, but I don't know where plans of this nature are located.

Thanks.

SJS

E R=Electric Railroad co Model trains

Pull them up & under hobby you will see the circut I'am refering to

JOHN G

As soon as I can get the parts I'll let how it all works out

JOHN G

My finger is faster than my brain  (I'll let you know how)

Here is the link to the circuit in question.

Larry

Note that DigiKey part number given in the parts list for the expensive component is obsolete due to lead content.  The $5 direct replacement:

http://www.digikey.com/product...425-2386-5-ND/720472

Info for this circut circuit Digikey has all of the parts 

JOHN G

Too bad there isn't a circuit board available, it would be pretty easy to create those.  That would make putting this together a very quick task.

Mr.gunrunnerjohn:

The schematic for this circut shows JP2 #1-3rd rail & # 2 "switched" First what is

switched? ?would this be out side rail which would also be ground if so shouldn't----

JP1  #2 be connected to JP2  #2 --I think "switched" has me confused

thanks

JOHN G

The "switched is the hot lead to the horn motor, the other horn motor lead goes to frame ground (wheels).  This circuit is turning the AC on/off using the solid state AC relay, basically an optically isolated triac.  Look at JP1 as being connected between pins 1 & 2 when the horn DC offset is present on the rails.

Thank you Mr. gunrunnerjohn with your help the project worked the first time

------with me, working the first time with anything doesn't happen often

how ever at low voltage(under 7-8 volts) it seems to pulsate --anything over that

 works fine so with a train pulling cars at 8v and up the whistle is very loud

Hitting the horn button 25-30 times over20 minutes it never failed  

This is the way to go to replace that old-elect-mech relay

Again many thanks

JOHN G

I don't doubt that there could be issues at low voltages, you need enough voltage to fully turn on the solid state relay.  An alternate circuit is floating around that uses a mechanical relay, I can't lay my hands on it right now, but it ran on the same idea.

I have a couple of the Lionel whistles from Harry Potter locomotives that have a built-in circuit to detect the offset and whistle, they work at a pretty low voltage.