So this is my first stab at designing and building a bandpass filter. TI has a filter building tool that determines component values. I am creating a 4-pole Chebyshev band-pass filter with a uni-polar power supply (5 volts) and a LM324 as the op amp.
How spot on do I have to be with component...
Hi there,
At my work, I have been given the task to find a 3? power meter that has an ethernet port and can communicate via TCP/IP. This device will be permanently mounted and remote communication will be used to view the meter. The meter will be monitoring the power supply to a ski resort...
First off I am an electrical type so bare with my potential to misname stuff. I have a guy at work doing a presentation on rigging. He has "rigged to disadvantage" pretty well nailed down. He uses a 4 part block and tackle as an example for the compounding force as the rope winds itself...
This question comes from another forum
http://www.nastyz28.com/forum/showthread.php?t=85418
"I filled a glass with 40% ethanol solution and left it open on the lab bench. When I came back next morning to the lab, I found that the ethanol concentration in the glass was still 40%."
The other...
Hello all,
I am installing a Controllogix device and using a Red Lion display for the HMI. I figured out how to get the ethernet working between the two. I am looking for a ethernet hub that operates off of 24 volts and haven't found anything on the net.
Any suggestions are welcome.
So I was unsuccessful with my previous attempt with...
http://eng-tips.com/viewthread.cfm?qid=183063&page=1
So I am coming at a different angle with native tag support…
http://www.redlion.net/Support/TechNotes/HumanMachineInterface/TNOI29.pdf
I was successful in connecting the two devices...
Hello all,
I am trying to get a Controllogix PLC to communicate with a Red Lion G3 touch screen via Ethernet. There are step by step instructions to follow in the attached link, but I am not able to get the PLC to talk to the Red Lion...
Hello all,
I am trying to program a PLC (Idec) to determine direction from two impulse proxs arranged in a quadrature formation. Searching around on the net has shown that a D-latch device can be used to determine direction, but the PLC doesn't have a D-latch device, just contacts, timers...
Hello all,
Can anyone recommend some reading material for understanding current density for a DC motor (1000 HP range). I've heard some conflicting opinions at work and would like to go to a new source. Searching here and the net has not been fruitful.
Thanks!
Hello all,
I'm looking for a simple drawing program. The application is for simple electrical schematics. The ideal program would allow me to import scanned in schematics as a "background" and allow me to add to the existing schematic.
This program will be used by other...
Hello all,
I'm looking for an optical encoder for a Reliance motor (800 hp). I have switched from a tachogenerator (100 V per 1000 RPM) to a 1024 Northstar magnetic encoder. With the motor heavily loaded, noise is getting into the encoder and blurring the pulses. This appears to the drive...
I work for Keystone Resort in Colorado. We are using Idec PLCs (FC4A-D40K3) to control our ski lifts. I was curious about some safety features that are associated with PLCs. I have searched on the internet and have found some general information about watchdog timers and power failure checks...
Hello all,
I work for a ski resort and we are having trouble with one particular motor. We have discovered that the commutator is out of round and we believe that is giving us trouble. The first thought is to remove the LARGE motor with a crane from a remote location and deliver the motor to...
