Wiparat Circuit Electronics

Inverter 12V to 220V 300W by NE555,2N3055
This be inverter circuit the size about 300W .It performs to transform from battery 12V be house electric 220V 50Hz by have signal picture is Square wave. And it has the distinction that uses the equipment seek easy, such as integrated circuit NE555 and 2N3055 transistors. request to have [...]

Someday I goes to visit a friend. He begs me helps to seek electric bell front door circuit. In model to be simple, use the a little equipment. I then choose the Door Buzzer circuit this give. Because of use , IC NE555 produce electric bell sound and use IC LM386 for amplify talk at [...]

This is Easy and Mini Simple Timer by CA3140 + NE555,
It use IC CA3140 for Timer and IC NE555 for Alarm Sound.
Source : Simple Timer by CA3140 + NE555