I am using a picaxe 08/M powered by 6v, as per instructions in the datasheets. Is it ok to activate an input using 9v, configured with a 1k protection resistor an a 10k pull down, as per the datasheet?
Based on the 22K used for +/-12V serial, for a 9V signal, something around 18K would seem to be the right value, and of course you can go higher, maybe even 100K.
quote 'Based on the 22K used for +/-12V serial, for a 9V signal, something around 18K would seem to be the right value, and of course you can go higher, maybe even 100K.'
thanks hippy. could you explain what this bit is for - a potential divider praps? to reduce the supply from 6v to 5.5v, or to limit the current to the input from 9v?