Hi all,
So I am making that Z80 Computer (ZBM), and I am having issues with these 4013 chips. Firstly, they are from china and I have tried two different chips but the same problem is still happening.
Simply put:
I have a toggle made from the flops (connecting /Q to ), so when the clock line is pulsed the flop toggles. Now this works if I use a wire directly from the clock line and connect it to the power but if I use a tactile switch it will happily turn on but not toggle back.
Now get this... If I use a supply of less than 3V (currently using 5V), the tactile switch works perfectly every time! That makes no sense at all to me:S! Why would it work only at a lower voltage when these devices are rated up to 15V!
I measured the voltages on the pin and nothing unusual is showing up
I do have de-bouncing circuitry
All unused inputs are pulled to ground
For now I am digging around for an "official" 4013 as a reference incase these chips are rubbish.
So I am making that Z80 Computer (ZBM), and I am having issues with these 4013 chips. Firstly, they are from china and I have tried two different chips but the same problem is still happening.
Simply put:
I have a toggle made from the flops (connecting /Q to ), so when the clock line is pulsed the flop toggles. Now this works if I use a wire directly from the clock line and connect it to the power but if I use a tactile switch it will happily turn on but not toggle back.
Now get this... If I use a supply of less than 3V (currently using 5V), the tactile switch works perfectly every time! That makes no sense at all to me:S! Why would it work only at a lower voltage when these devices are rated up to 15V!
I measured the voltages on the pin and nothing unusual is showing up
I do have de-bouncing circuitry
All unused inputs are pulled to ground
For now I am digging around for an "official" 4013 as a reference incase these chips are rubbish.