Cycle Test

R

Richard

Guest
What is the simplest way for me to perform a power up / down cycle test on a
24 volt device.
I need to have it power up for 3 minutes then shut down for 3 minutes and
repeat in an endless loop.

I have a 24 volt timer relay, some standard 24 volt relays, But I'm
thinking my best bet would be throw a pic up there with a driver chip to
drive the 80 ma coil on a relay to cycle it. But before I lay all this out
I thought I would ask for some suggestions in case I'm overlooking some more
simple.

Richard



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richard,

if you use pic stuff already and ahve a programmer etc. do it like that then
when you need a more complex test you can build on it easily..

PIC, (run it RC )
resonator / Xtal + 2 ceramic caps. (if not RC)
Transistor.
two resistors.
regulator or zener to run pic from same 24V supply.

have fun.

Andrew



"Richard" <REMOVE AT-DOTrwskinnerAT@awesomenetDOTnet> wrote in message
news:1123908401_53@spool6-east.superfeed.net...
What is the simplest way for me to perform a power up / down cycle test on
a
24 volt device.
I need to have it power up for 3 minutes then shut down for 3 minutes and
repeat in an endless loop.

I have a 24 volt timer relay, some standard 24 volt relays, But I'm
thinking my best bet would be throw a pic up there with a driver chip to
drive the 80 ma coil on a relay to cycle it. But before I lay all this
out
I thought I would ask for some suggestions in case I'm overlooking some
more
simple.

Richard



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Click to expand...
 
"Richard" <REMOVE AT-DOTrwskinnerAT@awesomenetDOTnet> wrote in message
news:1123908401_53@spool6-east.superfeed.net...
What is the simplest way for me to perform a power up / down cycle test on
a 24 volt device.
I need to have it power up for 3 minutes then shut down for 3 minutes and
repeat in an endless loop.

I have a 24 volt timer relay, some standard 24 volt relays, But I'm
thinking my best bet would be throw a pic up there with a driver chip to
drive the 80 ma coil on a relay to cycle it. But before I lay all this
out I thought I would ask for some suggestions in case I'm overlooking
some more simple.

Richard


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Click to expand...
Hoow close do you have to be to 3 minutes? Simplest thing would be to run 60
Hertz through a 14 bit binary counter, which would get you in the ballpark.
Or, use one of the CMOS counters that include an RC oscillator, and get it
to within a couple of %. Either way you can use a logic level N channel FET
to operate the relay, if you need it.

Tam
 
Thanks, for the suggestions...

I built one real quick last night. I ran a ULN2808 darlington off the
parallel port, enabled the freewheeling diode, then ran the output to a
relay. I have a timer in a dephi program toggling a bit. Oh, 1 hour fix
and a couple cups of coffee and she was working. about 90 cycles so far,
since I powered it up.

Power On. Power Off. - Just like the movie, uhmm, think it was Wax On,
Wax off.

Richard


"Tam/WB2TT" <t-tammaru@c0mca$t.net> wrote in message
news:Qd6dnaC1RqO_Z2DfRVn-qg@comcast.com...
"Richard" <REMOVE AT-DOTrwskinnerAT@awesomenetDOTnet> wrote in message
news:1123908401_53@spool6-east.superfeed.net...
What is the simplest way for me to perform a power up / down cycle test
on a 24 volt device.
I need to have it power up for 3 minutes then shut down for 3 minutes and
repeat in an endless loop.

I have a 24 volt timer relay, some standard 24 volt relays, But I'm
thinking my best bet would be throw a pic up there with a driver chip to
drive the 80 ma coil on a relay to cycle it. But before I lay all this
out I thought I would ask for some suggestions in case I'm overlooking
some more simple.

Richard


----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet
News==----
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Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption
=----

Hoow close do you have to be to 3 minutes? Simplest thing would be to run
60 Hertz through a 14 bit binary counter, which would get you in the
ballpark. Or, use one of the CMOS counters that include an RC oscillator,
and get it to within a couple of %. Either way you can use a logic level N
channel FET to operate the relay, if you need it.

Tam
Click to expand...


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On Sat, 13 Aug 2005 10:25:45 -0500, Richard top-posted:

Thanks, for the suggestions...

I built one real quick last night. I ran a ULN2808 darlington off the
parallel port, enabled the freewheeling diode, then ran the output to a
relay. I have a timer in a dephi program toggling a bit. Oh, 1 hour fix
and a couple cups of coffee and she was working. about 90 cycles so far,
since I powered it up.

Power On. Power Off. - Just like the movie, uhmm, think it was Wax On,
Wax off.
Click to expand...
Cool! It's always a pleasure to hear success stores on these design
things. :)
--
Cheers!
Rich
 
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