I don't know the specs of your circuit that you have made there, but I was thinking about using a portable phone charging bank, perhaps ripping the guts out of it and sticking it into the MicroTac battery compartment.
Something like this would work
This puts out 5v and makes the timer easily rechargeable.
I haven't installed the charging pack into the case or anything, but I have one that supplies constant 5v power and can run the first circuit board that I made pretty well, so this is what I'm probably going to end up doing.
I have the 3rd iteration of my original timer board on its way to me right now, so it looks like my journey is about to come to an end, as far as the original timer is concerned. Then onto the other versions.
Something like this would work
This puts out 5v and makes the timer easily rechargeable.
I haven't installed the charging pack into the case or anything, but I have one that supplies constant 5v power and can run the first circuit board that I made pretty well, so this is what I'm probably going to end up doing.
I have the 3rd iteration of my original timer board on its way to me right now, so it looks like my journey is about to come to an end, as far as the original timer is concerned. Then onto the other versions.