Atlas Classic series

[bnsf971]

Many bulbs are only rated at 1.5 volts, and most LEDs are rated at 4. If you want to use the lower voltage bulbs, you will need to install resistors so they won't blow.

 

[LotoQuestions]

TCS 1.5v support

Many bulbs are only rated at 1.5 volts, and most LEDs are rated at 4. If you want to use the lower voltage bulbs, you will need to install resistors so they won't blow.

I can't speak about the A4X but the TCS A6X has pads for direct support/provision of 1.5volts and is well documented.

,,,, ken