We found this circuit in a Linear Technology documentation from the 90's. Check the availability of new equivalents for the integrated if you need a new project.
A first circuit that uses a phototransistor as a detector and is suitable for covering short...
We found this circuit in recent English documentation. The circuit uses CMOS technology and can be...
We found this circuit in an old Mullard (Philips) documentation on the 555 and 556 integrated circuit...