The schematic shown below is a 555 timer circuit. NE555 is a famous IC comes in 8 pin dip plastic package. There is a huge list of 555 IC circuits due to which this IC is very popular among electronics hobbiests, students and experimenters. The circuit mentioned here is a ten minutes timer, after pusing
the button S1 the LED2 will become light after 10 minutes. For supply use any 9V battery or power supply.