The presented circuit uses a PNP transistor, which can be the BC558. Observe the polarity of the supply. The circuit is suggested by Texas Instruments opto-electronic documentation.
This simple two-transistor receiver was found in Radio Electronics magazine from September 1960....
We found this circuit in an article in Radio Electronics magazine from November 1971. The circuit has...
This single trigger circuit has been indicated for photography applications. The circuit is from a...