According to the data it says that you have to keep the clock high before you switch count Up or down on the cd4510be counter.
What if S1 is on, serving as a brake, can I then change up or down direction and that would be okay?

 

What if S1 is on, serving as a brake, can I then change up or down direction and that would be okay?

Yes, but you need a 10kΩ resistor from pin 15 to ground to insure that the signal goes low at that pin when the clock goes low (since the diode prevents it from being pulled low).

Note that diode on the switch is redundant.

What is the clock frequency?

 

Yes, but you need a 10kΩ resistor from pin 15 to ground to insure that the signal goes low at that pin when the clock goes low.
What is the clock frequency?

The clock frequency would be 1 Hertz and also 100 Hertz approximately. I thought one Meg would be okay from pin 15 to ground

 

Almost any resistor at those low frequencies.

 

View attachment 199571
Almost any resistor at those low frequencies.

Thanks Ron.

 

I'm not sure about this scenario. What if I change the up/down with s1 off, then I turn s1 on, would I restore the counter to proper operation by switching s1 again or do I have to power off then power on again?

 

I'm not sure about this scenario. What if I change the up/down with s1 off, then I turn s1 on, would I restore the counter to proper operation by switching s1 again or do I have to power off then power on again?

hi

good thinking!
standard practice for digital circuits is to initialize the devices to the required state before normal operation. Generally done with a power on reset (POR) circuit. That ensures the 4510 will begin at count 0 after power is applied.

eT

 

What if I change the up/down with s1 off, then I turn s1 on, would I restore the counter to proper operation by switching s1 again or do I have to power off then power on again?

The counter will still change the up/down direction but it may miss counts in the process.
You shouldn't have to power it off and back on.