I think this might work. The servo control as shown is in use on two Pop-Up pistol targets.
The 2k pots can be any low value, 5k-10k.With U1-3 low, adjust R5 for servo in magnets down.
With pin 3 high, adjust R4 for magnets up. No 4001, then we'll make diode NOR if you have a NPN
transistor.View attachment 119047

....
Bernard.
I like your suggestion ... Thank you.
It's in the right direction and gives me a better insight.
I'll chase parts and try this next week or so after my relatives leave.

 

I'll be tied up for next 3 days also, my daughters & all associated are coming tomorrow to celebrate my 90'th birthday.

 

I'll be tied up for next 3 days also, my daughters & all associated are coming tomorrow to celebrate my 90'th birthday.

Congratulations for your 90th Bernard.
Wel done and all the best.
I'm traveling back to Austalia for my mums 90th in May.
Wow ... my life went past so darned fast it all feels like yesterday.
As for this electronics hobby .... I promised myself 3 decades ago to get started.
I guess it's better late than never.