Hello

I am a hobbyist (HO scale DC electric trains) and I have made few tiny LED circuits in order to install them in some of my locomotives.

However while theses LED circuits perform as suppose to do powering them from a 9Volt battery, once I power them with 5 to 14 DCV power form my layout transformer/rheostat the LEDs either remain fully lighted or they are flickering. They do the same or worse if I put a locomotive to run on the trucks.

(I must say that these LED circuits will take power from the train trucks once installed.)

So my question to you is this:

Do you have a tiny device to fit inside the loco shell to help the LED circuits to avoid these abnormal behavior of the LEDs?

I thank you in advance for your valuable advice

Pat