Hello all, I considered doing this on my nodes, but didn't want to have a relay or fan wear out by cycling on each PTT. I tried using the connpgm and discpgm in rpt.conf to enable the fan during connections, and disable afterwards, but it was not very effective. I'd really like to find a fan control script like what I used on EchoIRLP... Something that activates by PTT, and keeps the fan going for X seconds afterwards.. I have multiple GPIO lines available on my parallel port, and still have the fan control hardware that I built for my EchoIRLP station here. At this point, the fan is just running 24 x 7. Maybe someone can come up with such a script? My bash is pretty crude. 73 Kyle K0KN --- Original Message ---
Has anyone used the GPIO lines on a URI to active a 12 volt DC fan when the PTT is active? I have a friend that who wants to implement this on his All-star node to keep his transmitter cool. I guess that we would need to use a relay with the GPIO line to protect the URI? Any thoughts or suggestions? Marshall - ke6pcv
Marshall,
I had the same idea and I contacted David Kramer at DMK Engineering (makers of the URI). He responded with this link on how to do exactly what you want;
http://www.dmkeng.com/images/GPIO_Relay.pdf
I tried it and it works great....
73, Neil WA5JXY