please help on parallel port

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impromptu.guitarist

hi
i want to connect a tea dispenser to my parallel port of the comupter .
the tea dispenser has a microcontroller which controls the motor (for
powder dispensing) and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
 
hi
i want to connect a tea dispenser to my parallel port of the comupter .
the tea dispenser has a microcontroller which controls the motor (for
powder dispensing) and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
Click to expand...

And I thought March break was over! <g>
Lee

Inviato da X-Privat.Org - Registrazione gratuita http://www.x-privat.org/join.php
 
hi
i want to connect a tea dispenser to my parallel port of the comupter .
Click to expand...

LOL. Why didn't I think of that!

the tea dispenser has a microcontroller which controls the motor (for
powder dispensing)
Click to expand...

Powder?
blasphemy

Hook up a grow light for the leaves, one of those birds the
flintstones use to harvest, a peltier and fan array to dry
the leaves, a grinder and then a heat lamp to turn it into
sun tea. Parallel ports might show their weakness here, I
suggest USB2.
and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
Click to expand...

Try it like this:

Parallel port -> Tea -> Cup -> Mouth

All kidding aside, you're almost as insane as I am.
 
hi
i want to connect a tea dispenser to my parallel port of the comupter .
the tea dispenser has a microcontroller which controls the motor (for
powder dispensing) and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
Click to expand...

The first thing to remember, when connecting devices, is the
dangers associated with interconnecting signals from one
device to the other. The person who designed the tea dispenser,
may not have planned on "user modifications". The devices may
have different ground potentials, and the parallel port
interface on the computer could be damaged by your tinkering.

There are probably a ton of web pages available, for building
interfaces to a parallel port. The parallel port uses 5V
TTL logic levels. The safest way to connect between the two
systems, is with a relay. Figure B and Figure C at the top of
this page, give you a switch contact to play with. For the relay,
you select a relay with a reasonably small coil current requirement.
The 1N4002 is used as a snubber, to absorb the back EMF from the
coil when it is de-energized. The 1N4002 must be present, if
the thing is to survive for a while.

http://ourworld.compuserve.com/homepages/Bill_Bowden/page6.htm

For maximum protection, you can buy a preconstructed I/O
product that connects to the parallel port. The outputs
on these things are switch contacts, so you cannot bugger up
the computer if you use one of these. Buying a solution
this way, avoids the messy selection process for the relay.
Just connect the switch contacts from the relay, to whatever
needs switching on and off.

http://www.electronics123.com/s.nl/it.A/id.1713/.f?sc=8&category=35

The relay coil is isolated from the switch contacts. That means
there is (practically) no way for current to flow from the
tea dispenser, into the computer, or vice versa.

Paul
 
hi
i want to connect a tea dispenser to my parallel port of the comupter .
the tea dispenser has a microcontroller which controls the motor (for
powder dispensing) and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
Click to expand...

If you are for real, what is the make and model of the
"micro controller"? Does this "tea dispenser" have a
"control port"? Perhaps a serial port?

Does the instructions/users manual mention a capability
to externally/remotely control this device? If so, does it
mention a parallel port?

What is the Make and model of this "Tea Dispenser"?
Does the manufacturer have an English language web site, with
product information?

Luck;
Ken
 
kony said:
(e-mail address removed) wrote:

LOL. Why didn't I think of that!



Powder?
blasphemy

Hook up a grow light for the leaves, one of those birds the
flintstones use to harvest, a peltier and fan array to dry
the leaves....
Click to expand...

Blasphemy! Tea leaves need to be properly fermented for the best cup of
tea. This will require a timer application, a "slicer/dicer", a humidity and
temperature controlled area, and finally a heating element to "fire" the
leaves to the proper amount of moisture content.

Jon
 
hi
i want to connect a tea dispenser to my parallel port of the comupter .
the tea dispenser has a microcontroller which controls the motor (for
powder dispensing) and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
Click to expand...

I'd go for an opto-isolated controller card for that added protection in
these 'helter-skelter' times.

<http://www.globalsources.com/gsol/I...urers/b/2000000011008/3000000154682/16573.htm>
<http://www.advantech.com/products/sub_category.asp?Category_ID=1-UC8SC&BU=eA>


Richard.
 
hi
i want to connect a tea dispenser to my parallel port of the comupter .
the tea dispenser has a microcontroller which controls the motor (for
powder dispensing) and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
Click to expand...

I used to plan on getting some sort of control and monitoring over my
complex hydroponics grow system from my old Amiga. I planned on it
monitoring temperature levels and controlling the flood and drain cycles as
well as the in-line extractor fan. When I had the required sensors it could
sense best times to eject CO2 and maybe I could even get it to alert me when
pH levels got too high or low on the vegetative or flowering stages. But it
was all just a pipe dream.

ss.
 
Synapse Syndrome said:
I used to plan on getting some sort of control and monitoring over my
complex hydroponics grow system from my old Amiga. I planned on it
monitoring temperature levels and controlling the flood and drain cycles
as well as the in-line extractor fan. When I had the required sensors it
could sense best times to eject CO2 and maybe I could even get it to alert
me when pH levels got too high or low on the vegetative or flowering
stages. But it was all just a pipe dream.

ss.
Click to expand...

Pipe Dream? Just what were you growing with your complex
hydroponics grow system? Posting from California, are you?
( I built a simple Hydroponics system using PVC pipe and a
pond pump on a timer, worked great.)

Simple process control plans/articles/kits have been around
since the TRS-80 days ( and before). Microcontrollers were
made for such applications. You gave up too easily.

Luck;
Ken
 
hi
i want to connect a tea dispenser to my parallel port of the comupter .
the tea dispenser has a microcontroller which controls the motor (for
powder dispensing) and a valve for hot water dispensing.
what should my new parallel port diagram look like?
i am very new to these things and its sort of urgent.
thanks in advance
Click to expand...

I smell homework. Term project coming due maybe?
 
Pipe Dream? Just what were you growing with your complex
hydroponics grow system? Posting from California, are you?
( I built a simple Hydroponics system using PVC pipe and a
pond pump on a timer, worked great.)

Simple process control plans/articles/kits have been around
since the TRS-80 days ( and before). Microcontrollers were
made for such applications. You gave up too easily.
Click to expand...


Well, er.. you know... potent, high yield, compact growing indica/sativa
hybrids such as Blueberry and Northern Lights. I don't see the point of
growing indoors in California when you can use the natural sunlight you get
over there. This was in the UK, in the mid 90's.

We had metal halide lamps for the vegetative stage and high pressure sodium
for the flowering stage, flood and drain table with the plants in rockwool
cubes placed in clay pebbles.

Timers controlled the lights, extractor fan, CO2 emitter and flood and drain
water pump. In time I realised that I would have to go into the loft
(attic) everyday anyway to adjust the light height and to adjust the pH and
nutrient levels as the plants grew so fast. We were growing in a pretty
technical way for optimum growth speed and yield rather than being organic,
but we loved to just look at the plants anyway, so my original plans to
somehow automate things further with computers were forgotten.

ss.
 
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