The summer this year is too hot, the heat is not really a problem but mosquitoes ...! ,especially i camping.
So after i tried some solutions i got the idea to make an electronic mosquito repellent that i can take with me wherever i go. this circuit is just a transistor multivibrator that generates high frequency sound ,and mosquitoes don't like this sound.
I am not gonna use a PCB i will just solder components together to make it a simple and cheap
Update : here is the Kicad project + (the PCB , the schematic , the components view ) in PDF