This is a simple plug and play mosquito repellent. It comes in very handy.
Step 1: What All You Will Need.
You will need the following:
A piezoelectric transducer
A 1000 ohms rectifier diode
An electric socket
A transient voltage diode 1500W
Step 2: Soldering Together
Solder all the components together on a perfboard and add the plug socket
Step 3: Adding the Cover
Find a suitable cover for the circuit board to be kept in. I got mine from one of those plug and play electric speakers.