8 Player Quiz Buzzer
This simple 8 player quiz buzzer circuit is based on one IC namely 74LS373 with few more easily available components. 74LS373 is a 3 state octal D type transparent latch and edge triggered flip flop. When its enable pin 11 is high the output will follow the data feed on its input. And when enable pin is low the output will be latched at the level of the data means no further change is allowed in output. 74LS373 contain 8 D type flip flop in a single chip. It also has the facility to buffer control inputs. In short 74LS373 transfer signals from D0 to D7 at the input pin to the corresponding outputs Q0 to Q7.
Light emitting diodes (LEDs) are semiconductor light sources. The light emitted...
1N4148 is a high speed switching diode. The switching diodes are designed such that their reverse recovery time is very small compared to ordinary diodes. The typical switching time is 4 nsec. It comes in hermetically sealed leaded glass package. The PIV rating is 100V. The maximum repetitive peak forward current is 450 m...