Convert LR44-powered to AC

[horc00]

Hi everyone,

Sorry, electrical noob here. I know I can probably spend some time googling to piece together a solution (I've tried but haven't yet gotten all the answers I need yet), but I'm eager to do up a lighting display for my kid's room, hence hoping you guys can help me out here.

I have 8 lighting displays that each uses 3x LR44 batteries (1.5V, 150mAH each) in series. I would like to wire them all up to a single AC adaptor. I have a few questions:

1. Option 1: Using an adaptor with 9V DC output, can I just wire the lights into 4 paralleled series of 2 lights each? i.e. 2 lights in each parallel circuit (2 x 3 x 1.5V = 9V)
2. Option 2: Using an adaptor with 5V DC output, can I just wire the lights into 8 paralleled series of 1 light each? i.e. (3 x 1.5V = 4.5V) in each parallel circuit
3. Which option is preferable?
4. Do I need any other components such as a voltage regulator or can I just wire them adapor directly to the lights?
5. What is the minimum output amperage that I would need?

Appreciate any help I can get.

Here's an example of the light.

 

[telectrix]

i'd go with option 1. 4 sets of 2 lights (in series) then parallel the 4 sets. your PSU should be DC output and be at least 2A rating

 

[Spoon]

You could try something like this, then you can experiment more with your choices. Selected voltages, from 3v to 12v. @ 1.5A.