programming a ATtiny85 using Arduino UNO
when programming attiny85 using uno can ports tied uno tiny85 programmed perform i/o after programming finished , downloaded , after turning off power , disconnecting uno tiny85 applying power again?
yes. once sketch running io pins controlled it.
other stuff may not know should useful real soon:
re-moding io pins act differently on-the-fly @ run time behind quite few arduino tricks.
pins can in 4 different states electrically:
output , low sink 40ma current short periods or 20-25ma continuous/
output , high source same low sink.
you have make sure limits not exceeded. current-limiting resistors used.
input , low 'eat' 1 millionth of amp when pin read. can read fast.
if don't read input low pin. electrically neutral.
input , high source weak current. can ground pin safely no external resistor.
this great buttons/switches. it's ground-safe , needs no external pullup or pulldown circuit.
mit attiny programming in case don't have link.
other stuff may not know should useful real soon:
re-moding io pins act differently on-the-fly @ run time behind quite few arduino tricks.
pins can in 4 different states electrically:
output , low sink 40ma current short periods or 20-25ma continuous/
output , high source same low sink.
you have make sure limits not exceeded. current-limiting resistors used.
input , low 'eat' 1 millionth of amp when pin read. can read fast.
if don't read input low pin. electrically neutral.
input , high source weak current. can ground pin safely no external resistor.
this great buttons/switches. it's ground-safe , needs no external pullup or pulldown circuit.
mit attiny programming in case don't have link.
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