Made it to scare away wild boars. Super bright if LED voltage is cranked all the way up so careful around public roads and stuff.
Simple print with almost no supports needed and cost should be around 20$
Parts list:
Pir sensors 3pcs: https://s.click.aliexpress.com/e/_DlUd6l7
Power switch 10x15mm: https://s.click.aliexpress.com/e/_DEkuDuz
Charge port Connector jack: https://s.click.aliexpress.com/e/_DkGAGWz
LED chips 12V 10W: https://s.click.aliexpress.com/e/_DFQyTEt
For the sound i used five of these: https://s.click.aliexpress.com/e/_DcJdLwp
Just wired them up in parralel with the LED-s
Boost converter to drive the leds: https://s.click.aliexpress.com/e/_DmUj7pP
You will need 2s battery pack to be able to drive the LEDs full power
The case fits 4 18650 cells comfortably and i used this balance bms to build a pack from some used cells: https://s.click.aliexpress.com/e/_DkoSa69
A mosfet to switch leds, i used: https://s.click.aliexpress.com/e/_DkfOt2p
You can use your favorite microcontroller but i used the esp32 with the external antenna connector like this: https://bit.ly/3THwJMZ
You will also need diodes on each of the trigger pins on the pir sensors otherwise they will backfeed into eachother
Sipsik
