Search found 11 matches

by Rayleigh
Sun Aug 07, 2011 6:07 am
Forum: General Discussion
Topic: How to send carriage return command to USB connected device?
Replies: 8
Views: 1650

Re: How to send carriage return command to USB connected dev

Here is a quote from the engineer: The "Control M" character which is the ASCII for carriage return (13), when sent from a PC to the OS1p (with the modified internal software in the fluorometer) would initiate a trigger. This is not available on the older fluorometer (OS1-FL) The USB capability is o...
by Rayleigh
Fri Aug 05, 2011 10:17 am
Forum: General Discussion
Topic: How to send carriage return command to USB connected device?
Replies: 8
Views: 1650

Re: How to send carriage return command to USB connected dev

Thanks MrAl! I've tried some google searches for a prepackaged device to do this but I haven't turned up anything - most likely because I am not using the right key words. What would you recommend I search for to do the job?
by Rayleigh
Fri Aug 05, 2011 8:27 am
Forum: General Discussion
Topic: How to send carriage return command to USB connected device?
Replies: 8
Views: 1650

How to send carriage return command to USB connected device?

I need some help/guidance please! Here is the issue - I need to send a carriage return command to a device via a USB connection. Here is the rub - I need to do this without a PC. I suspect there is a way to use a microcontroller to send the carriage return command but how do I send it out via a USB ...
by Rayleigh
Fri Jun 05, 2009 1:30 pm
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

Re: residential thermostat hack help needed

Thanks! I'll check Omega more closely.
by Rayleigh
Thu Jun 04, 2009 9:39 am
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

Re: residential thermostat hack help needed

Oh yeah, also, what kind of accuracy are you after? In other words, if you set it to
25.0 deg C and it actually works at 25.5 deg C would that be a problem, or would
you really really need 25.1 deg C say?
Ideally I'd like the temperature to stay +/- 0.1 degree C of the set point.
by Rayleigh
Thu Jun 04, 2009 4:35 am
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

Re: residential thermostat hack help needed

I dont know if you are into microcontrollers though.
Not yet - but I see I need to learn!
by Rayleigh
Thu Jun 04, 2009 2:34 am
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

Re: residential thermostat hack help needed

Nice, thanks! It will take awhile to gather together the parts and build it. A few questions: 1) I have 1 kOhm thermistors (normal sized and ~0.3mm diameter). Can these be used with a 1kOhm resistor in place of R2 and R1? 2) One of the nice things about the residential thermostat is that it displays...
by Rayleigh
Wed Jun 03, 2009 12:46 pm
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

Re: residential thermostat hack help needed

Yes. A schematic would be very helpful, thanks!
by Rayleigh
Wed Jun 03, 2009 11:04 am
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

Re: residential thermostat hack help needed

We use a 12V lead acid battery to make the unit easy to take into the field. The programmable residential thermostats I've seen run off batteries (a few volts and low current) that I could grab from the 12VDC battery. The industrial temperature controllers seem to need wall power or much higher DC v...
by Rayleigh
Wed Jun 03, 2009 9:53 am
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

Re: residential thermostat hack help needed

Excellent suggestion about the industrial temperature controller! I'll look into it. Thanks!
by Rayleigh
Wed Jun 03, 2009 6:14 am
Forum: General Discussion
Topic: residential thermostat hack help needed
Replies: 15
Views: 2761

residential thermostat hack help needed

Hi all, I'd like to use a programmable residential thermostat to provide temperature control for a thermoelectric element. I am currently using a nice DC motor control kit from All Electronics to control the heating/cooling of the element. An external tiny thermocouple is used to measure the tempera...