Mosquito Repellant

I find Mosquito Repellant circuit from Graham Maynard.
Consisting of a phase locked loop (CMOS 4047) wired as a 22KHz oscillator,
The output is further amplified by a pair of complimentary output transistors and drives 3.25 inch Piezo.

Home Camera TV

There are many model that can use and install in your home. Example put at top of your ceiling near the door. U can see people arrive when you in bedroom. What the part?
1. TV cam in my place about 150rb
2. Extended video Cable and Repeater if needed
3. Television Box :-) about 500rb

now i want search the splitter when i use 2 or 4 cameras. AnyOne have the circuit?

note: 1rb = 1000rupiah (about 0,1 USD)