Discussion:
Still controller and PC Monitor
(too old to reply)
Ross
2004-12-24 02:12:22 UTC
Permalink
Something I have been working on for some time now is to design and build
the perfect still controller and monitor that can record the results and
print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html

Any sugestions are welcome.

Regards
Ross
Firefox
2004-12-25 02:36:36 UTC
Permalink
Post by Ross
Something I have been working on for some time now is to design and build
the perfect still controller and monitor that can record the results and
print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Really interesting Ross and I'm sure we all welcome your input but I for one
don't need the accuracy and logs etc. that all your hard work and time
provide.
Once my kit is stabilised my reflux still gives good output at 96%/vol if
squeezed.

I'm not knocking your efforts just opening the channels for further
discussion.

Please post again I was really interested.

Oh and welcome I haven't seen u here before. Merry Xmas. Your location would
be good.( Country good enough)
Lotte Oala
2004-12-25 21:33:37 UTC
Permalink
Wow, prety nice job idd, i'm an electronic engeneer student.
Interresting stuf, any more work that good displayed online?
Post by Firefox
Post by Ross
Something I have been working on for some time now is to design and build
the perfect still controller and monitor that can record the results and
print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Really interesting Ross and I'm sure we all welcome your input but I for one
don't need the accuracy and logs etc. that all your hard work and time
provide.
Once my kit is stabilised my reflux still gives good output at 96%/vol if
squeezed.
I'm not knocking your efforts just opening the channels for further
discussion.
Please post again I was really interested.
Oh and welcome I haven't seen u here before. Merry Xmas. Your location would
be good.( Country good enough)
Ross
2004-12-28 12:41:02 UTC
Permalink
The microcontroller used is a PIC16F877, the code was written in C
and it uses a CO-OP Real Time Operating System that I wrote specificly for
the PIC microcontroller. By using the CO-OP RTOS the PIC can spend most of
the time in sleep mode, and stablity is fantastic. The RTOS uses 420 bytes
of ROM and 7 bytes of RAM per task, minimal impact on the 8k bytes that
the 877 has available.
It uses a DS18b20 temp sensor for +-0.5 `C accuracy.
The PID routine uses full floating point math routines.

It struck me yesterday that this controller, with minimal changes could
be used for many other uses, such as room air temp, a burn in box, etc.

Regards,
Ross
Post by Lotte Oala
Wow, prety nice job idd, i'm an electronic engeneer student.
Interresting stuf, any more work that good displayed online?
Post by Firefox
Post by Ross
Something I have been working on for some time now is to design and
build the perfect still controller and monitor that can record the
results and print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Really interesting Ross and I'm sure we all welcome your input but I
for one don't need the accuracy and logs etc. that all your hard work
and time provide.
Once my kit is stabilised my reflux still gives good output at 96%/vol
if squeezed.
I'm not knocking your efforts just opening the channels for further
discussion.
Please post again I was really interested.
Oh and welcome I haven't seen u here before. Merry Xmas. Your location
would be good.( Country good enough)
Ross
2004-12-28 12:53:44 UTC
Permalink
Post by Lotte Oala
Wow, prety nice job idd, i'm an electronic engeneer student.
Interresting stuf, any more work that good displayed online?
Post by Firefox
Post by Ross
Something I have been working on for some time now is to design and
build the perfect still controller and monitor that can record the
results and print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Really interesting Ross and I'm sure we all welcome your input but I
for one don't need the accuracy and logs etc. that all your hard work
and time provide.
Once my kit is stabilised my reflux still gives good output at 96%/vol
if squeezed.
I'm not knocking your efforts just opening the channels for further
discussion.
Please post again I was really interested.
Oh and welcome I haven't seen u here before. Merry Xmas. Your location
would be good.( Country good enough)
I thought the .com.au would be a give a clue, but to be specific South
East Queensland, Australia. Not to hot , not to cold. Pitty it's a
technology backwater.
Garry Beattie
2004-12-29 20:23:33 UTC
Permalink
Post by Ross
I thought the .com.au would be a give a clue, but to be specific South
East Queensland, Australia. Not to hot , not to cold. Pitty it's a
technology backwater.
Hi Ross.

I am also in SE Qld too. Bundaberg in fact.

Regards

Garry
Ross
2004-12-30 07:48:25 UTC
Permalink
I'm more south, Toowoomba
Regards
Ross
Post by Garry Beattie
Post by Ross
I thought the .com.au would be a give a clue, but to be specific South
East Queensland, Australia. Not to hot , not to cold. Pitty it's a
technology backwater.
Hi Ross.
I am also in SE Qld too. Bundaberg in fact.
Regards
Garry
W.Jansen
2005-01-15 22:30:12 UTC
Permalink
Post by Ross
Something I have been working on for some time now is to design and build
the perfect still controller and monitor that can record the results and
print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Hallo Ross

What kind of still do you use, a pot still or a kolom?
How do you regulate the power to the still, is it switched on and off or do
you chance the current or????

I am trying to regulate my still by using a PLC and i look for the best way
of stering the heating element.

P.S.
Sorry for my english, i am from holland and was not so good at school
Ross
2005-01-17 23:22:31 UTC
Permalink
Not knowing the specific type of PLC that you are using I don't know if
you have a variable voltage output. If you do then a Solid State Relay SSR
like a crydom Proportional Controller.
http://www.crydom.com/product/producttreeresults.asp?Family=PCV&MountingStyle=up%20to%20280,Panel%20Mount&UOM=Vrms&SwitchingVoltage=AC,Control%20-%20Volts%20DC

This may give you some ideas as these are strong and relativly safe to use.

Ross

On Sat, 15 Jan 2005 23:30:12 +0100, W.Jansen
Post by W.Jansen
Post by Ross
Something I have been working on for some time now is to design and build
the perfect still controller and monitor that can record the results and
print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Hallo Ross
What kind of still do you use, a pot still or a kolom?
How do you regulate the power to the still, is it switched on and off or do
you chance the current or????
I am trying to regulate my still by using a PLC and i look for the best way
of stering the heating element.
P.S.
Sorry for my english, i am from holland and was not so good at school
W.Jansen
2005-02-03 19:14:46 UTC
Permalink
I use a siemens s7-200 plc type 224
This controller has no variable output but I manage that by using a resistor
bank on six outputs to make a variable output.
Your link to the crydom PROPORTIONAL solid state relais is verry useful.
I did know solid state relais but not proportional solid state relais.
This is what I am loking for.
Thanks
Post by Ross
Not knowing the specific type of PLC that you are using I don't know if
you have a variable voltage output. If you do then a Solid State Relay SSR
like a crydom Proportional Controller.
http://www.crydom.com/product/producttreeresults.asp?Family=PCV&MountingStyle=up%20to%20280,Panel%20Mount&UOM=Vrms&SwitchingVoltage=AC,Control%20-%20Volts%20DC
Post by Ross
This may give you some ideas as these are strong and relativly safe to use.
Ross
On Sat, 15 Jan 2005 23:30:12 +0100, W.Jansen
Post by W.Jansen
Post by Ross
Something I have been working on for some time now is to design and build
the perfect still controller and monitor that can record the results and
print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Hallo Ross
What kind of still do you use, a pot still or a kolom?
How do you regulate the power to the still, is it switched on and off or do
you chance the current or????
I am trying to regulate my still by using a PLC and i look for the best way
of stering the heating element.
P.S.
Sorry for my english, i am from holland and was not so good at school
Billstein
2005-02-26 01:52:06 UTC
Permalink
Hello, I use a variac. It works wonders, Heres is an address take a
look.They do make 220 versions as well.

http://store.yahoo.com/webtronics/varacouttran.html
Post by W.Jansen
Post by Ross
Something I have been working on for some time now is to design and build
the perfect still controller and monitor that can record the results and
print a graph of the run.
http://www.eightbit.com.au/home/auto_still.html
Any sugestions are welcome.
Regards
Ross
Hallo Ross
What kind of still do you use, a pot still or a kolom?
How do you regulate the power to the still, is it switched on and off or do
you chance the current or????
I am trying to regulate my still by using a PLC and i look for the best way
of stering the heating element.
P.S.
Sorry for my english, i am from holland and was not so good at school
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