@ScottAndrews Looks pretty simple, I agree. If I'm understanding you correctly, the rheostat in its standard state in our vehicles is decreasing the voltage flowing between input and output to decrease the brightness of the light. The LM134 is limitng the current, in contrast, thereby allowing modulation of the LED brightness. Your diagram shows that the 12V from the battery goes to the LM134, that output goes to the rheostat but then it appears that both the output that went through rheostat as well as direct out of LM134 are joined to go to LED lamps. So I guess the rheostat is not a 0-100 possibility as it is now but is modulating the total above and beyond that allowed by the LM134?
Also, given that I'd consider myself a beginner-intermediate macro-electrician (i,.e., cars and houses) but a complete novice at micro-electrics (circuit boards et al), is something like the LM134 available in an already-built fashion so someone with my skill level could try it out without having to put together a whole circuit board?
Also, given that I'd consider myself a beginner-intermediate macro-electrician (i,.e., cars and houses) but a complete novice at micro-electrics (circuit boards et al), is something like the LM134 available in an already-built fashion so someone with my skill level could try it out without having to put together a whole circuit board?