Im trying to make a binary counter. "ripple through" counter
I'm using a 555 chip to make a square wave. however when the output of the 555 is fed to the first Flip-Flop it doesnt appear to do anything. [ as opposed to when i manually touch the F-F to GND]
I'm using SN54LS73A JK master slave flip-flop. its negative edge triggered.
I want to use 3 bits so it cycles between 0to7 on the output.
Right now, I have all J&Ks connects to positive. and Q feeding clk2 and q2 feeding clk3. LED outputs are q1,q2,q3 correct?
The output right now appears random, but does cycle a bit(not completely in binary order) when i manually use a wire to momentary put clk1 to ground.
Any idea how i can get this thing working right?
Datasheets
http://www.datasheetcatalog.org/datasheets/208/338045_DS.pdf
http://www.taydaelectronics.com/datasheets/A-032.pdf
555 connected like so
http://www.ohmslawcalculator.com/555_astable.php
R1=1k
R2=12k
C=220uf
Trying to connect flip flops like this
http://www.wisc-online.com/objects/ViewObject.aspx?ID=DIG4203
I'm using a 555 chip to make a square wave. however when the output of the 555 is fed to the first Flip-Flop it doesnt appear to do anything. [ as opposed to when i manually touch the F-F to GND]
I'm using SN54LS73A JK master slave flip-flop. its negative edge triggered.
I want to use 3 bits so it cycles between 0to7 on the output.
Right now, I have all J&Ks connects to positive. and Q feeding clk2 and q2 feeding clk3. LED outputs are q1,q2,q3 correct?
The output right now appears random, but does cycle a bit(not completely in binary order) when i manually use a wire to momentary put clk1 to ground.
Any idea how i can get this thing working right?
Datasheets
http://www.datasheetcatalog.org/datasheets/208/338045_DS.pdf
http://www.taydaelectronics.com/datasheets/A-032.pdf
555 connected like so
http://www.ohmslawcalculator.com/555_astable.php
R1=1k
R2=12k
C=220uf
Trying to connect flip flops like this
http://www.wisc-online.com/objects/ViewObject.aspx?ID=DIG4203