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tutorial8_4

# tutorial8_4 - Elec 151 Tutorial#8 Lab 4_2 Flip-Flops and...

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1 Outline : • Lab 4-2: Flip-Flops and Sequential Logic II - Clock Generator using 555 timer IC - 7-Segment Display (common anode) - BCD code - 74LS47 (BCD to 7-segment display decoder) - 4-Bit Synchronous counters - 74LS163 (Synchronous binary counter) TTL counters design - Example Elec Elec 151 Tutorial #8 151 Tutorial #8 2 Clock Generator using 555 timer IC 555 Timer Output T1 = Clock high time = 0.7(R a + R b ) C 1 T2 = Clock low time = 0.7(R b ) C 1 T = Clock period = T1 +T2 = 0.7 (R a + 2R b ) C 1 DC = Duty cycle = T1/T = = period time high R R R R a b a b + + 2 0 1 T1 T2 T Clk Bypass capacitor Lab 4_2: Flip-Flops and Sequential Logic II Lab 4_2: Flip-Flops and Sequential Logic II Prelab (1) Design the a counter circuit required and draw the schematics with all parts like IC, LEDs and resistors. (2) Read through the specifications and determine the connections for any unused input pins, e.g. 74LS47 pin3 LT (lamp test). In lab (1) Implementation of a counter with beginning offset and limit (2) Two part of hardware (a) A 00 to 59 counter

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