Found in 90s Radio Electronics, this circuit is intended for amplifying analog video signals. Integrated circuits are uncommon today and the bandwidth is 100 MHz.
One flip-flop of the 4018 can be used as a frequency divider or counter as shown here. Frequency...
We found in this American documentation this circuit for activating common cathode displays. In it we...
SST LLE Series Liquid Level Sensor Switches Available through Mouser Electronics, these solid...