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Hi,
I thought it was a 16F88 ... sorry !
Did you install the 0.1µF close to the '87 supply Pins ( between pins is best ! ) ... and a 10µF+ Tantalum as close as possible ???
Some decoupling might be also necessary for the 555 : there are well known current spikes while the output stage toggles ... or try a CMOS 555 !
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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