Thanks for the info . . .
I've now got 120 ohm resistors in series with the segment pins.
The buttons are given to a 1K then to GND, internal pullup enebled.
I'm using pref board. Checked for loose contacts. Did find one but that didn't solve the strange reset problem.
The IC is resetting when i just make a light touch on the MCLR pin.
The MCLR pin is given to Vcc through a 10k resistor.
I've got another clock using the very same circuit and it doesn't reset that easy.
Could this be due to ESD ? ? ?
The clock also has a battery backup.
<img src="http://www.delabs-circuits.com/png_circuits/embedded/battery-backup.png">
Pin 3 is used to monitor the mains input. (it is given to the output from the 5v reg ,and not the output of battery backup ,through a voltage divider network).
Could the battery backup be causing a problem ?
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