Several times we forget to switch off the gas, electric oven, stove or motor while watching TV or taking on the phone or while talking to a friend in your neighborhood. To solve this problem we have described a circuit below which gives an alarm after the preset time interval selected by you. In this you can select 7 different time intervals with the help of a rotary switch. Therefore after a preset interval of time it will give a loud alarm and reminds you that you have to off your machine or gas.
The circuit is built around the CD4060 which is 14 stage ripple carry binary counter, divider and an oscillator. Its built in oscillator is main feature of this IC that’s why it can be used in numerous application like flasher, clock generator in timer circuits.