Search found 6 matches

by rick.curl
Fri Feb 09, 2007 10:38 am
Forum: Computer Programming
Topic: Looking for PLC with 16 analog inputs, or similer
Replies: 3
Views: 2697

Hi Craig- If you look at the Labjack forum, there is some discussion about this. Using an Edelbrock TK-4 thermocouple converter will work provided you give it a negative supply. This will allow up to 16 thermocouples to be connected to a Labjack U3. Or- you could build your own thermocouple amplifie...
by rick.curl
Fri Feb 09, 2007 10:11 am
Forum: General Discussion
Topic: TJ Byers passing
Replies: 13
Views: 4481

Thanks, Michael.

I will look forward to reading it. I'm very glad to know Nuts & Volts is planning on honoring TJ with an in-depth article!

-Rick
by rick.curl
Sun Feb 04, 2007 2:31 pm
Forum: General Discussion
Topic: Current Indicator Circuit Breaker
Replies: 14
Views: 4210

You can get these current transformers: http://rocky.digikey.com/WebLib/Amveco-Talema/Web%20Data/AC1025.pdf for about six bucks each from Digi-Key. Put a 100 ohm resistor across each one and bring the pins out to a couple of tip jacks on a panel, and you're done. I would think that as small as these...
by rick.curl
Sun Feb 04, 2007 8:33 am
Forum: Computer Programming
Topic: Looking for PLC with 16 analog inputs, or similer
Replies: 3
Views: 2697

Hi Craig-

As for the hardware, how about this: http://www.labjack.com/labjack_u3.php?prodId=25

You'll probably need to add some external gain and cold-junction compensation externally to get the thermocouple outputs up to a reasonable level that the LabJack can handle.

-Rick
by rick.curl
Sat Feb 03, 2007 8:06 pm
Forum: General Discussion
Topic: Typical RS customer service
Replies: 19
Views: 5211

Several years ago I walked into a Radio Shack and asked for a 741 OP amp. I got a blank stare. I asked "Where do you keep your op amps?" Another blank stare. Then I said "I need to buy an operational amplifier". The sales clerk got huffy and said "SIR- All of our amplifiers are operational". I give ...
by rick.curl
Sat Feb 03, 2007 7:29 pm
Forum: General Discussion
Topic: TJ Byers passing
Replies: 13
Views: 4481

TJ Byers passing

I was stunned to find a small block at the bottom of page 6 of the February issue about the death of TJ Byers on January 11th. I have enjoyed reading his columns for several years and have learned quite a lot from him. It's a bit eerie that in the same issue that announced his death there is a curre...