This timer was designed mainly to switch off a portable radio after some time: in this way, one can fall asleep on the sand or on a hammock,...

When activated by pressing a button, this time delay relay will activate a load after a specified amount of time. This time is adjustable to...

Simple to build, simple to make, nothing too complicated here. However you must use the CMOS type 555 timer designated the 7555, a normal 5...