This is Set-Reset NAND Gate Flip-Flop Electronic Suite Diagram. The only difference between a gated (or enabled) latch and a flip-flop is that a flip-flop is enabled only on the rising or falling edge of a “clock” signal, rather than for the entire duration of a “high” enable signal. Converting an enabled latch into a flip-flop simply requires that a “pulse detector” circuit be added to the Enable input, so that the edge of a clock pulse generates a brief “high” Enable pulse
PARTS AND MATERIALS
- 4011 quad NAND gate (Radio Shack catalog # 276-2411)
- 4001 quad NOR gate (Radio Shack catalog # 276-2401)
- Eight-position DIP switch (Radio Shack catalog # 275-1301)
- Ten-segment bargraph LED (Radio Shack catalog # 276-081)
- One 6 volt battery
- Three 10 kΩ resistors
- Two 470 Ω resistors
Caution! The 4011 IC is CMOS, and therefore sensitive to static electricity!
Although the parts list calls for a ten-segment LED unit, the illustration shows two individual LEDs being used instead. This is due to lack of room on my breadboard to mount the switch assembly, two integrated circuits, and the bargraph. If you have room on your breadboard, feel free to use the bargraph as called for in the parts list, and as shown in prior latch circuits.
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