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there is also updated schematics including one that sacrifices the auto turn off but reduces the part count a bit
P.S would you mind explaining to me how the auto on off works?
but i know the BC557 will work for t3 as i built this on my breadboard before i made the pcb but i think i put some wrong traces on my pcb causing a short somewhere or something.
I probably could design and etch a surface mount version and fit it within a calculator case?
Also @hyper if the price isn't too high I want to buy a pre-programmed chip off of you, ill pay shipping&price.
ok i am getting 5v now but now when i tap the button the lcd baclight turns on when the button is pressed and then the led blinks on dimly for a slpit sec after the button is released when i press and hold the button for like a szecond sometimes the led and backlight come on a then go off after a while and sometimes they just stay on till i disconnect the battery. any ideas?