I purchased a Christmas village from Walmart on sale after the holiday season (Holiday time 30 piece Mini House Set). The 5 houses take 2x AAA batteries each, but I converted them to DC plugins already. While I was doing that I noticed the streetlights in the set had hollow tubes and the globes were removable, so obvious we need to install LED lights in there. Here's where it gets tricky because the area is so small I need to figure out how to deliver power.
I've using 0603 SMD LEDs with leads on it that I'm piping down the light pole to the base. I have room for a small PCB at the base but not much.
I'm thinking for power delivery I'd like to do some pogo pins to a pad. I have some very tiny rare earth magnets I can put on both sides to ensure they attract and "stay put."
Ideally if space allows I would like the lamps to be polarity agnostic (my wife will setup the village and tear it down and I don't want her to have to worry about which way to orient the lamps), so I'm thinking a bridge rectifier with schottkey diodes (if I can find smd ones small enough to fit in the base with the pogo pings and magnet)
There will be 5 "power delivery" pads connected in parallel back to a DC power supply. I'm thinking about tying to use the same power supply that the village houses use at 3vdc, but the bridge rectifier is looking at about .6V drop and forward voltage for the 0603 is 2.7 - 3.0v on data sheet for the LED. So I'm concerned that I won't have sufficient supply to illuminate the streetlamps. I could install something upstream near the DC power supply that would bump the voltage up for all 5 parallel paths but before I go looking into that, are there other compact ways I could achieve polarity agnosticism without the voltage drop?