Skip to main content

Hi All,

I’m also working on a 1:1 scale Subway train in my train room. It’s actually all original parts. Anyway, I’m working on all the lighting now. I’ll be using 12 VDC. I was able to swap out all the glass bulbs for LED’s except for two LED’s on a PCB board inside a passenger door indication panel. I believe this board was fed with 32 VDC. I’m assuming there’s something that dropped the current down for the LEDs. Please have a look and see if there’s components I need to swap out of simply don’t need for just lightining the original LEDs again. D10A12BA-F4F5-456B-B33C-0B4498DDAE9EA48DC971-CD0B-4E14-967C-3C944E91B889B0433C2F-7DCF-4B9B-B23F-133E97704627880367AF-33A5-46FF-BCF0-05CB6B781DCCB58770EE-F4D6-4EC3-BCC7-3241A13F3BB5

Attachments

Images (5)
  • D10A12BA-F4F5-456B-B33C-0B4498DDAE9E
  • A48DC971-CD0B-4E14-967C-3C944E91B889
  • B0433C2F-7DCF-4B9B-B23F-133E97704627
  • 880367AF-33A5-46FF-BCF0-05CB6B781DCC
  • B58770EE-F4D6-4EC3-BCC7-3241A13F3BB5
Original Post

Replies sorted oldest to newest

I'd probably get rid of all the stuff except the LED's on that panel and then use a 1/2W 560 ohm resistor in series with each of them to the 12V supply.  That will light them continuously, if you want to switch them, we can talk.

Cool project BTW.

Continuously is the plan, and thanks, it is a fun project, all the parts are original for this car.

Brian

Last edited by MCD4x4

Gunrunner John has it right.

Don't use any of the circuitry on those boards. Just cut the leads to the existing LEDs (thankfully the leads have some extra wire to work with) and power them with 12 volts DC and the 560 ohm resistor John suggested. The board even shows you which lead on the LED is negative. It looks like that board has seen better days anyway. Lots of ugly solder work there.

What a neat thing to have in your train room!

Last edited by Rich Melvin
@Rich Melvin posted:

Gunrunner John has it right.

Don't use any of the circuitry on those boards. Just cut the leads to the existing LEDs (thankfully the leads have some extra wire to work with) and power them with 12 volts DC and the 560 ohm resistor John suggested. The board even shows you which lead on the LED is negative. It looks like that board has seen better days anyway. Lots of ugly solder work there.

What a neat thing to have in your train room!

Hi Rich, Thanks for the advice, John is an invaluable help to all of us. the board has seen many days since 1957 to the early 60's when these cars were made for the City of New York, every part on there is original OEM. I forgot to mention, on the other side of the cab is the men's room. I still have to hang the motorman's cab door and the sink. It's a work in progress.

IMG_0876IMG10364



Brain

Attachments

Images (2)
  • IMG_0876
  • IMG10364

I'd probably get rid of all the stuff except the LED's on that panel and then use a 1/2W 560 ohm resistor in series with each of them to the 12V supply.  That will light them continuously, if you want to switch them, we can talk.

Cool project BTW.

John,

Would you have a look at these resistors on eBay and recommend the best ones to go with please?

https://www.ebay.com/sch/i.htm...esistor&_sacat=0

Any of the 1/2 watt 560 ohm resistors would be fine.  A couple of those links were for assorted values.  I'm partial to real electronic supply houses, I'm 100% sure of what I'm getting.  Shipping for first class from Digikey is $4.99, so you can have a hundred of these for a little over $7, and they're a known quality.

560 ohm 1/2W Resistors at Digikey

Attachments

Images (1)
  • mceclip0

Does it drain directly onto the tracks, like in the good old days?

Somewhere in my vast collection of souvenirs that happened to fall off a wall and into my luggage, while traveling around the UK and Europe, is a sign:

"Passengers will please refrain from flushing toilets whilst the train is standing at the station platform."

Back in the 70's, I was traveling by train in Sweden and had to make use of the facilities.  While standing at the commode, I felt a great wind.  I looked down through the commode and saw the track ties going by.  Different...  BTW, they also had a sign on the door to the restroom to not use it when in the station!

Any of the 1/2 watt 560 ohm resistors would be fine.  A couple of those links were for assorted values.  I'm partial to real electronic supply houses, I'm 100% sure of what I'm getting.  Shipping for first class from Digikey is $4.99, so you can have a hundred of these for a little over $7, and they're a known quality.

560 ohm 1/2W Resistors at Digikey



thanks for the help, and yes the air gauge is working as well as the horn 👌

Attachments

Images (1)
  • 177386327_4299051736779731_5740379669740106863_n
Last edited by MCD4x4

John, can you recommend a transformer I can use, the space I have for it is 3” deep, 9x9 square to keep it hidden. I was thinking of an open transformer like the one in the basement that’s used for the door bell. Here’s a picture of the one I used for testing. I’ve had it since the late 70s  F67C2E2C-6032-44A4-B6B7-47BD1271F3B91A9D234D-F017-400E-8C46-BF42DB9FC8C3

Attachments

Images (2)
  • F67C2E2C-6032-44A4-B6B7-47BD1271F3B9
  • 1A9D234D-F017-400E-8C46-BF42DB9FC8C3

Well, there are tons of power supplies that will fit in that space if you need that voltage and current!  Here's one that has twice the current and will rattle around like a pea in that big space.

thank you for that, I have another question sir,  I want to be able to power a light two different ways, to prevent a back feed while using switch A, what type of Diode would I use. Looking on Digikey, there’s thousands of them. 🤦‍♂️

Brian

Add Reply

Post
OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
330-757-3020

www.ogaugerr.com
×
×
×
×
Link copied to your clipboard.
×
×