Re: Prevent signal when device is turned on
- From: "john jardine" <john@xxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 21 Mar 2007 22:53:59 -0000
<grubertm@xxxxxxxxx> wrote in message
news:1174514182.289030.239570@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have one of the output pins of a 16F84A hooked up to a transistor
which in turn drives a relay. Though the software can drive that pin
low, my concern is that during power up there might be enough current
to switch the transistor.
Since this is a kit-type project I can not do major modifications, so
is there a simple way to bypass the base for a brief period of time
and only when the signal is high for a longer time will it actually
switch the transistor ?
Hang a capacitor on the connection between the transistor base and it's base
resistor and the 0V. (something like 1uF).
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