Well, I have used 8051 micro with my fish tank but not for temp and
heater as I have goldfish and they are industrial grade (temp wise)
:-)

I use the AT89C2051 to turn on the filter and the air at programmed times.

http://www.bhargavaz.net/aqua/

Regards,

Chetan Bhargava


On Tue, 9 Nov 2004 07:55:20 -0700, Ed Edmondson, Jr.; Ph. D.
<dredwinjr@bresnan.net> wrote:
> I am kinda new to this (newbie) list and wanted to build a heater for my 2
> gallon desktop fish tank.
> 
> I was thinking I could use a silicone encapsulated power resistor for the
> heater and a AD590 / LM334 (encapsulated) for the temperature sensor. The
> temperature range would only be from about 60 degrees F on the low end to 80
> degrees F on the high end. With a PIC I could use a smart LCD to display the
> temperature, some switch configuration to program the set points, and to
> control (with PWM?) the heater.
> 
> I tried to build a heater using comparators, and while it seemed to work,
> the approach wasn't really what I needed. Thus the reason for the PIC
> approach. Just starting, as I am, I was hoping for some assistance with PIC
> selection, where I might find similar schematics to use as a  reference, and
> other comments / suggestions you may wish to pass along.
> 
> As far as equipment goes, I have a PS Plus, MPLAB, an ICD 1 & 2, a TEK2235,
> a bench 3.5 digit DVM, and a 1.25 to 20 volt DC power supply. Still looking
> for the frequency counter and wave form generator. I have all this equipment
> I collected and decided to try and do something with it. BTW, I am not a
> design engineer or programmer. I was a Quality/Reliability Engineer in my
> past life.
> 
> Regards,
> Ed
> 
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-- 

Chetan Bhargava
www.bhargavaz.net
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