Switching time was set to 1m. I reset it to 1s. That seems to have cleared up the time skip.

Yeah, the button must be released before the end of the cycle.

ak

 

Yeah, the button must be released before the end of the cycle.

ak

Thank you for your input and schematic, I appreciate the time spent in helping me complete my goal.

 

Yeah, the button must be released before the end of the cycle.

ak

Maybe the switch should be differentiated(?)

 

Maybe the switch should be differentiated(?)

Nope. The switch has to be held down long enough for the counter to advance from 0 to 9, approx. 1 sec. After that, the decoded segments keep the oscillator enabled.

ak

 

Nope. The switch has to be held down long enough for the counter to advance from 0 to 9, approx. 1 sec. After that, the decoded segments keep the oscillator enabled.

ak

Ok...so its important the TS uses a momentary button or switch, and not a toggle switch, or the circuit will continuously cycle thru 9-0.

 

Nope. The switch has to be held down long enough for the counter to advance from 0 to 9, approx. 1 sec. After that, the decoded segments keep the oscillator enabled.

That isn't what the OP asked for. He wanted to turn on "a switch", have the circuit count down to zero, energize a relay which would stay energized until the switch was turned off.

I want to have a switch that when is turned on will start a countdown from 10 seconds and when hitting zero it will energize a 120v relay circuit turning on a light. Which will remain on till switched off.

 

Here is version using CD4029. The simulation is shown in initial power up state.
I haven't shown a power switch but it could easily be added, or the existing button could be replaced with a toggle switch.
Bypass caps also are not shown. See below.