Search found 22 matches

by b1miller
Thu Jan 29, 2009 2:37 pm
Forum: General Discussion
Topic: Anyone here have Fios internet and/or TV?
Replies: 14
Views: 2508

We have had the Verizon Fios internet & phone service for about 2 years.
Fios tv is available and I will be switching to that soon.

Customer service is much beter than our cable supplier and the 3 in one package Fios price will be much cheaper.

Local cable supplier is sweating a little
by b1miller
Wed Jun 18, 2008 4:15 pm
Forum: General Discussion
Topic: Connecting CMOS relay outputs in parallel
Replies: 3
Views: 1393

I am going to be driving an small LED rated at about 10-15mA and a Sonalert, but the voltage is actually 9vdc. It looks like I will be ok to breadboard up and test tonight.
Thanks for all your info.
by b1miller
Tue Jun 17, 2008 6:48 pm
Forum: General Discussion
Topic: Connecting CMOS relay outputs in parallel
Replies: 3
Views: 1393

Connecting CMOS relay outputs in parallel

I am designing a circuit in which I will be driving 3 separate solid state optomos relays. Clare # LBA110. The supply voltage is 5vdc. Is there any problem paralleling the outputs to drive an LED or Sonalert? Spec sheets don't address this issue, but based on my limited cmos knowledge, it should work.
by b1miller
Sat Jan 19, 2008 4:08 pm
Forum: General Discussion
Topic: CHANGE 3phase to 'single phase 60Hz ...???
Replies: 12
Views: 5075

Depending on the size of your 3 phase motor, one option is to use a VFD with a single phase input. Allen Bradley and others make VFD's with a 240V single phase input that will produce 240 or 480 3 phase output. The only limitation is that they typically may not handle more than a 2-3 HP motor.
by b1miller
Mon Jan 07, 2008 3:56 pm
Forum: General Discussion
Topic: Digital Panel Meter common or floating ground
Replies: 1
Views: 1088

Digital Panel Meter common or floating ground

I am working on a temp sensor circuit using one of the common DPM modules. How about a clear explanation of the difference between the common and floating ground models. Since I need to offset the V- terminal by 2.554V, it would appear that I need to use the floating ground version. My V+ terminal w...
by b1miller
Thu Dec 13, 2007 5:03 pm
Forum: Computer Programming
Topic: rs logix 500
Replies: 1
Views: 2917

At one point you could download a free copy of RS-Logix 500 from Rockwell Software. The kicker is that you could only program a 10 or maybe 16 point MicroLogix 1000. I can look around my computer and see if I still have it. Otherwise, if you know the right people, they can loan you a copy of RS-Logi...
by b1miller
Tue Nov 13, 2007 4:45 pm
Forum: General Discussion
Topic: PM-1029B Digital Panel Meter Questions
Replies: 13
Views: 4890

Evahle,

Thanks for the tips. I was beginning to suspect that this board was based on a 7107 chip by looking closely at the circuit board. I planned on replacing the trim pot with a multi-turn pot. Your other mods will be very helpful.
by b1miller
Sun Nov 11, 2007 11:23 am
Forum: General Discussion
Topic: PM-1029B Digital Panel Meter Questions
Replies: 13
Views: 4890

Thanks for the reply. I ended up figuring it out the old fashioned way. A few hours on my workbench revealed most of it's secrets. One interesting note, even though the power supply and measured voltage are supposed to have a common negative, it read dc voltage quite well from a different source tha...
by b1miller
Thu Oct 11, 2007 4:22 pm
Forum: General Discussion
Topic: PM-1029B Digital Panel Meter Questions
Replies: 13
Views: 4890

I did download the Circuit Specialist document before I ordered the DPM and it is the same data sheet that came it. I will start browsing through my back issues of N&V. I remember that TJ Byers had covered similar DPM's in several of his columns over the past few years. The biggiest question that I ...
by b1miller
Wed Oct 10, 2007 7:50 am
Forum: General Discussion
Topic: PM-1029B Digital Panel Meter Questions
Replies: 13
Views: 4890

PM-1029B Digital Panel Meter Questions

I bought a PM-1029B Digital Panel Meter from Circuit Specialists and Iam looking for any additional info on using it. The single date sheet that comes with it is not all that informative. I believe that there has been some columns on this and similar DPM's in Nuts & Volts over the past few years. Si...
by b1miller
Sun Aug 12, 2007 8:23 am
Forum: General Discussion
Topic: Strange AC Power Issue
Replies: 214
Views: 60118

Robert,

This is the link to the Darwin Awards is was referring to.


http://www.darwinawards.com/
by b1miller
Sat Aug 11, 2007 8:15 pm
Forum: General Discussion
Topic: Strange AC Power Issue
Replies: 214
Views: 60118

Well, I can see this thread rapidly sliding down hill. I will gracefully bow out of this subject at this time. I sincerely do hope that I see our resident expert referenced at the next annual Darwin Awards.
by b1miller
Fri Aug 10, 2007 9:05 pm
Forum: General Discussion
Topic: Strange AC Power Issue
Replies: 214
Views: 60118

Chris, My original point remains that by doing some of things you mention, you will be violating the NEC in several areas. You cannot just modify electrical wiring, whether residential or commercial to suit your notion of what you believe will work better. Any electrical inspector would immediately ...
by b1miller
Fri Aug 10, 2007 5:42 pm
Forum: General Discussion
Topic: Strange AC Power Issue
Replies: 214
Views: 60118

Chris, The NEC clearly distinguishes between a grounded conductor which will carry current under normal conditions and a equipment grounding conductor which is only intended to carry the fault current until the circuit breaker or fuse clears the fault current. They are not the same thing and should ...
by b1miller
Thu Aug 09, 2007 9:14 pm
Forum: General Discussion
Topic: Strange AC Power Issue
Replies: 214
Views: 60118

Robert, Excellent post regarding GFCI operation. One of the common uses of a GFCI outlet is when updating older house wiring that used 2 conductor wiring without a ground wire. The NEC allows the use of a GFCI outlet to replace an existing ungrounded outlet which then also protects any downstream ou...