Various simple electronics projects circuits diagrams for hobbyist and beginners . Simple circuits, mini projects with diagrams and description from many electronics categories.
The timing circuit is built using XR2240 integrated circuit manufactured by EXAR. The circuit is intended for use in timing circuits in various applications such as TV and radio equipment for monitoring battery charge and similar photo applications. Timer can be set between 15 minutes and 24 hours and 45 minutes, with two switches BCD (binary coded decimal).
Using some electronic components can be built a simple relay driver to drive a relay. This circuit change state of a standard relay each time a pulse is applied (or press a button).
Using the ICM7250 timer integrated circuit manufactured by Maxim can be build a simple timer using few electronic components. The circuit has eight programmable inputs for connecting.
