[App_rpt-users] URI ptt current sink

David Kramer dkramer at dmkeng.com
Tue Jan 11 01:35:22 EST 2011

Hi Scott,

The URI PTT open collector output will only sink about 50mA.  You will need
to boost the output for your application.  See
http://www.dmkeng.com/images/HIGH_CURRENT_PTT.pdf for a suggestion on how to
do this.  If you don't need 4 amps you can use a smaller MOSFET.

Please contact me if you need any more info about this.

David Kramer
DMK Engineering Inc.

-----Original Message-----
From: app_rpt-users-bounces at ohnosec.org
[mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Scott Weis
Sent: Monday, January 10, 2011 8:12 PM
To: app_rpt-users at ohnosec.org
Subject: [App_rpt-users] URI ptt current sink

How much current can the PTT on a URI sink. I have a device that draws
between 200- 250 ma at 5vdc and don't want to smoke it.


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