We found this circuit in the October 1994 issue of Electronics Now magazine. The circuit uses a now-uncommon 4046 PLL and the gates of a CMOS 4001.
In the figure we have the shot made by an interrupted light beam using a phototransistor or a...
Using a CA3130 operational amplifier, this circuit from a 1977 documentation can handle low...
This is the receiver for the CB1364E transmitter. Other receivers can be found in this section of...