12f675 to latch output while it does something else

[mark_s]

In addition to what others suggested. Are you using a transistor to buffer the pic
output from the relay coil? If not you may be exceeding the current capacity of
the output pin. This could cause heating and result in the pic resetting. Also inductive
voltage spikes can cause resets. A simple schematic would help of your relay connection.

[AVGuru]

In addition to what others suggested. Are you using a transistor to buffer the pic
output from the relay coil? If not you may be exceeding the current capacity of
the output pin. This could cause heating and result in the pic resetting. Also inductive
voltage spikes can cause resets. A simple schematic would help of your relay connection.

Hi mark, thanks for the heads up on that, Yes I'm using a 2N2222 for the output to relay on open emitter, as well as a diode across the relay to stop it from chattering.

[HenrikOlsson]

Hi,

Hi henrik, I seem to have lost A.0 & A.1 & A.3 as outputs....? I tried to swap the led around the port, but they won't light up.

Not sure I understand what this means.
On the 12F675 you have GPIO.0 etc. Make sure you reference that and make sure you set/clear TRISIO accordingly.

/Henrik.

[AVGuru]

Hi mark, thanks for the heads up on that, Yes I'm using a 2N2222 for the output to relay on open emitter, as well as a diode across the relay to stop it from chattering.

THANK YOU all. got it to work on the PICEASY board, now to put it in a box and on the wall.


thanks again