Re: [App_rpt-users] GPIO fan control
I forgot to mention that I've also had good luck assigning multiple Parallel port pins to PTT in usbradio.conf or simpleusb.conf, such as: pp3 = ptt pp4 = ptt Again, I'd rather not cycle a relay with every PTT. I'd much prefer the fan run for 2 minutes or so after the last PTT, then shut off. That would save a lot of wear and tear on the fan and relay. My setup is probably a bit unusual, as I have several transceivers cooled by one large fan. It's occurred to me that I could always build a 555 timer circuit to use along with my fan control, but a software solution should be just as simple. I guess I'll have to try to hack the TXFAN script I used on IRLP? 73. Kyle K0KN
On Fri, January 27, 2012 12:43, K&R Yoksh wrote:
I forgot to mention that I've also had good luck assigning multiple Parallel port pins to PTT in usbradio.conf or simpleusb.conf, such as:
pp3 = ptt pp4 = ptt
Again, I'd rather not cycle a relay with every PTT. I'd much prefer the fan run for 2 minutes or so after the last PTT, then shut off. That would save a lot of wear and tear on the fan and relay.
How about a 555 timer IC hooked up to PTT in one-shot mode with a 2 minute timer? Very old skool, but might do the job. 73, Andrew ZL3AME
Well, if you *really* want old school, how about an Amperite time delay tube?? If it was good enough for Collins and the like, it should be good enough for ham radio :-). JIM WB6NIL
Date: Fri, 27 Jan 2012 15:41:32 +0900 From: a.errington@lancaster.ac.uk To: yokshs@gmail.com CC: app_rpt-users@ohnosec.org Subject: Re: [App_rpt-users] GPIO fan control
On Fri, January 27, 2012 12:43, K&R Yoksh wrote:
I forgot to mention that I've also had good luck assigning multiple Parallel port pins to PTT in usbradio.conf or simpleusb.conf, such as:
pp3 = ptt pp4 = ptt
Again, I'd rather not cycle a relay with every PTT. I'd much prefer the fan run for 2 minutes or so after the last PTT, then shut off. That would save a lot of wear and tear on the fan and relay.
How about a 555 timer IC hooked up to PTT in one-shot mode with a 2 minute timer?
Very old skool, but might do the job.
73,
Andrew ZL3AME
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participants (3)
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Andrew Errington -
Jim Duuuude -
K&R Yoksh