I've got one of these that runs the motor one way for "on" and the other
way for "off". Add a microswitch that follows the valve position and
you've got it! The timer in question runs off 2 "C" cells and is
programmable for "time on" and "duration". Made by Melnor (sp?), large
distributor of lawn/garden accessories. Probably available from others.

Much Luck!


**THE-RFI-EMI-GUY** wrote:

Check the hardware store for electronic watering timers. There are some
that work from AA batteries. Hack it open, replace the motor with a
relay. You will probably need a latching relay arrangement or be
otherwise creative as the timer runs the motor for a few seconds open
and closed.

J999w wrote:

I'm looking for ideas for a stand alone timer to turn on and off a remote
shortwave or BCB receiver and tape recorder. No AC mains available.
Switching
requirements no more than about 5 amps.
Haven't had much luck scouring the web.

Ideas?

John WB9UAI

Thats a good idea. Also consider if the timer reverses the motor it
could also control a polarity sensitive latching relay or a common dual
coil latching relay with steering diodes.

I have used Melnors in the past for watering, they tend to short out
internally due to moisture. I kept Melnor busy warranteeing those
things. Of course for this purpose it would be ideal. I had ones with a
7 day schedule. Pretty neat...when they worked!

Joe

Harvey Babb wrote:

I've got one of these that runs the motor one way for "on" and the
other way for "off". Add a microswitch that follows the valve position
and you've got it! The timer in question runs off 2 "C" cells and is
programmable for "time on" and "duration". Made by Melnor (sp?), large
distributor of lawn/garden accessories. Probably available from others.

Much Luck!


**THE-RFI-EMI-GUY** wrote:

Check the hardware store for electronic watering timers. There are
some that work from AA batteries. Hack it open, replace the motor
with a relay. You will probably need a latching relay arrangement or
be otherwise creative as the timer runs the motor for a few seconds
open and closed.

J999w wrote:

I'm looking for ideas for a stand alone timer to turn on and off a
remote
shortwave or BCB receiver and tape recorder. No AC mains available.
Switching
requirements no more than about 5 amps.
Haven't had much luck scouring the web.

Ideas?

John WB9UAI









--
Joe Leikhim K4SAT


"Jazz is not dead. It just smells funny." -F.Z.

Thats a good idea. Also consider if the timer reverses the motor it
could also control a polarity sensitive latching relay or a common dual
coil latching relay with steering diodes.

I have used Melnors in the past for watering, they tend to short out
internally due to moisture. I kept Melnor busy warranteeing those
things. Of course for this purpose it would be ideal. I had ones with a
7 day schedule. Pretty neat...when they worked!

Joe

Harvey Babb wrote:

I've got one of these that runs the motor one way for "on" and the
other way for "off". Add a microswitch that follows the valve position
and you've got it! The timer in question runs off 2 "C" cells and is
programmable for "time on" and "duration". Made by Melnor (sp?), large
distributor of lawn/garden accessories. Probably available from others.

Much Luck!


**THE-RFI-EMI-GUY** wrote:

Check the hardware store for electronic watering timers. There are
some that work from AA batteries. Hack it open, replace the motor
with a relay. You will probably need a latching relay arrangement or
be otherwise creative as the timer runs the motor for a few seconds
open and closed.

J999w wrote:

I'm looking for ideas for a stand alone timer to turn on and off a
remote
shortwave or BCB receiver and tape recorder. No AC mains available.
Switching
requirements no more than about 5 amps.
Haven't had much luck scouring the web.

Ideas?

John WB9UAI









--
Joe Leikhim K4SAT


"Jazz is not dead. It just smells funny." -F.Z.