27 Jan
2012
27 Jan
'12
6:41 a.m.
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