Hello: I am wiring a small (~2' x 13') HO switching layout and currently have a separate power bus, using a 9v 300mA "wall wart", to power 10 Tortoise switch machines. I will next be adding LED lighting to the scenery and was curious if the group would recommend running a power bus for the LEDs that is separate from the bus used for the switch motors, or if it would be ok to use the same bus.
I anticipate having around 150 small LEDs ("grain of sand" type bulbs or slightly larger). If a separate bus would be preferred, would another 9v 300mA bus do the trick?
Thanks in advance for your comments,
Brent
Tortoise switch machines require ~10 ma. Modern LEDs may require < 5ma.
While a 300 ma wall wart would not be sufficient for 150 LEDs, there's no reason you can have multiple wall warts, each proving power to some section of the layout. Each should be the same voltage.
while you could have separate supplied for the LEDs and switch machines, there's really no need to have a single bus around the entire layout for just the switch machines.
greg - Philadelphia & Reading / Reading
As a rule, I would use separate power supplies for each.
On my modules I'm using a 12VDC .5 Amp wall wart for the tortoise switch motors and a 6VDC 300mA wall wart for accessory lighting.
Dan
I too prefer separate bus lines for separate purposes. I use 12 VDC lines because I like the warm look of incandescent bulbs. For a few LEDs I put in resistors. I also use this bus for my Miller Engineering advertising signs, again lowering the voltage with resistors. I also installed separate bus lines for streetlamps so I can turn those off separately.
I run power from a small separate supply directly to the control panel, and then power the Tortoise machines individually from there. I power twin-coil machines first through a Capacitive Discharge circuit and then the control panel. Each turnout gets its own cable. I use 4-conductor phone wire for that.yes, ther are extra wire, but having them neatly bundled in a cable is cheap.
It takes an iron man to play with a toy iron horse.
DanRaitza 6VDC 300mA wall wart for accessory lighting.
it makes sense to use a lower voltages supply for just LEDs considering that few LEDs require more than 4V
gregc it makes sense to use a lower voltages supply for just LEDs considering that few LEDs require more than 4V
I use a 12 volt supply for my 16 volt incandescent bulbs. That gives a softer, warmer glow and the bulbs basically never burn out.
Many thanks for the comments. Very helpful and much appreciated.