Re: [Elecraft] [K3] Pull-up question

... Joe, W4TV > -Original Message- > From: Jack Brindle [mailto:jackbrin...@earthlink.net] > Sent: Sunday, March 08, 2009 12:36 AM > To: li...@subich.com > Cc: d...@w3fpr.com; 'elecraft' > Subject: Re: [Elecraft] [K3] Pull-up question > >

Re: [Elecraft] [K3] Pull-up question

To add a bit more to Don's last point, there is a situation that few folks (especially engineers) realize with respect to interconnect drive systems. With todays low-power microcontrollers and digital systems, it is very easy to accidentally power another device from the driving device. In

Re: [Elecraft] [K3] Pull-up question

on Wilhelm >> Sent: Saturday, March 07, 2009 2:56 PM >> To: Roger >> Cc: elecraft >> Subject: Re: [Elecraft] [K3] Pull-up question >> >> >> Roger, >> >> That is where the situation gets 'sticky'. It all depends on >> what the &

Re: [Elecraft] [K3] Pull-up question

h.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm > Sent: Saturday, March 07, 2009 2:56 PM > To: Roger > Cc: elecraft > Subject: Re: [Elecraft] [K3] Pull-up question > > > Roger, > > That is where the situation gets 'sticky'. It a

Re: [Elecraft] [K3] Pull-up question

Roger, That is where the situation gets 'sticky'. It all depends on what the circuits at the end away from the K3 have implemented. You have two pullup resistors on each line and 2 separate voltage sources. 1) If the voltage to the pullup resistors in the internal device do not match the vol

Re: [Elecraft] [K3] Pull-up question

> -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roger > Sent: Saturday, March 07, 2009 12:04 PM > To: elecraft > Subject: Re: [Elecraft] [K3] Pull-up question > > Mike Fatchett, > OK

Re: [Elecraft] [K3] Pull-up question

ilman.qth.net] On Behalf Of Roger Sent: Saturday, March 07, 2009 12:04 PM To: elecraft Subject: Re: [Elecraft] [K3] Pull-up question Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early

Re: [Elecraft] [K3] Pull-up question

Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS

Re: [Elecraft] [K3] Pull-up Question

craft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Corboy-Poteet Sent: Saturday, March 07, 2009 10:44 AM To: elecraft@mailman.qth.net Subject: [Elecraft] [K3] Pull-up Question I've a question on the pull-up resistor mod for the KIO3 board: is this addition being done to

[Elecraft] [K3] Pull-up Question

I've a question on the pull-up resistor mod for the KIO3 board: is this addition being done to support "legacy devices" or is it the wave-of-the-future (or none of the above)? If current interface "standards" don't require the pull-up capability and the outlook for the future is the same, I th