Egg Timer (CB1503E )

 
    This simple timer causes an LED to blink after an interval of the order of 7 minutes which is the normal cooking time of an egg. The circuit is from a 1974 publication, and may have its time altered by the R1 resistor. The MPF102 supports MPF102 or BF245 as equivalent and the LED can be any color.

 


Circuit Bench