AVR-Chat

Ah OK. Now you’re starting to make sense of where the fault is.
 
As someone else already suggested, shouldn’t you investigate with the original supplier of the board you are talking to and find out why it hangs? 
 
Can you replicate the failure? Surely powering off this board is very drastic and are you sure that there are no other consequences of doing so? Like for instance, what is it connected to? Is powering on and off going to cause other issues later on.
 
Better to fix the problem than try to work around it if at all possible.
 
PS.. If you want to see how to use a FET to switch VCC on or off, check out the circuits for the FT232RL from FTDI. They use this very technique to power up external devices after the USB driver has negotiated the link with the USB host controller in the PC. You can control this FET from your micro easily.
 
Regards
Dave…
 
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of AMIT KAPOOR
Sent: 03 September 2010 12:14
To: AVR-Chat@yahoogroups.com
Subject: Re: [AVR-Chat] Power reset (VCC) of some device from MICROCONTROLLER OUTPUT PIN without using relay
 
  

Hello Dave,

Thanks for the reply.

Actually the problem is not on the PIC side . The problem is on the other device 
with which PIC is communicating. So i have to reset( Power) the other device and 
not the PIC. basically there is predefined protocol( from this device comany) to 
communicate with this device but sometimes this device hangs and stops 
responding. There is no option other than to hard reset it..So i need something 
to hard reset the VCC of this device. I hope i am clear.

Is there some IC which can source current of around 600 ma( 1 Amp will be on 
safe side!) and can be turned on/off from PIC pin. That would be perfect!...Any 
Suggestions??

Thanks 
Kaps




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