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hi, a friend is trying to make a 'rep counter' has wired up a Picaxe18 totwo 7 segment displays direct. it works when (for example) if you do..... let pins = 9 the display shows 09 but when the output is between 10 and 16 the display shows a blank on the second display. What is the easist way...

Trying to build a counter that could be used in an auction situation, with buttons for plus and minus in the values £5 £10 £20 £50 £100 £250. I then need a display showing the figure (5 digits should do it) and a reset to zero again, one option is a switch that...