I bought a small skeleton dog from an eBay seller. Although described as “animated” he doesn’t move, but the eyes flash and he barks.
There are two modes; sound activated and push button (“try me”) activated. Not all that useful.
So… I removed the battery / control / speaker box from his head and ran new wiring to the eye LEDs.
The original control board was reused with a larger speaker and sounds so much better, especially the growling.
Since the original batteries were 3 small cells, I powered it from 5V with a series diode to drop the voltage a little.
I was going to do a gable roof, but lack of time meant he got a flat one instead !
The wood looks too new, so I’ll give it an aged look for next year.
This sensor has a maximum detection distance of 80cm.
It is connected to control board that in turn triggers the dog via the original “try me” switch wires.
That also provides a lockout time so he isn’t going off all the time.
You couldn’t see them at night.
Everything was wired up and tested on the big day.
I’ll be making a more suitable control board for 2016.
If I can find the bracket, I’ll mount the speaker to the rear wall.