- Published in issue 12/1996 on page 90
Current limiting with a 555
Strictly speaking, the title 'current limiting' is not entirely right, since the circuit itself does not limit, but detects. When the current through the load is too high, pin 3 of lCI goes low. Reset switch SI needs to be operated to make the pin high agaiu, but this is, of course, only possible after the current has dropped to an acceptable level. For whiehever purposes the level change at pin 3 is used is up to individual requirements.