Morning Andy, >> At 02:40 AM 9/7/2008, you wrote: When I built test equipment I would always put a LED and resistor in
parallel with the fuses. If you saw a lit LED you immediately knew which fuse was blown. It works with AC or DC at just about any voltage as long as you size theresistors accordingly. A pretty neat trick to save troubleshooting time.
Yes, Indeed. The use of the LED is limited only by the imagination, You are bringing back many memories. One or two, I have to mention.Any one of these devices could be used to make CS, in 10 or 20 rooms, simultaneously. A stainless steel plate, several rows of holes, ( very precision ) LED's installed, a diode matrix or two, and of course resistors, a few other things, and A nice display and simple control exists.
The next could be used to make CS remotely, on a mountain top, and the batch started and stopped,
with wireless controls, 20 miles or more away. That was not the purpose of course. This controller I build was used for NON duplication of Cable Channels, which is a LAW that this must be done.The unit contained 1800 feet of hook up wire. All in short pieces. Not a small undertaking.
This controller would control ONE WEEK of programming, for many TV channels.Yes, this programmer had "Daily Selection" "without eliminating circuits".
Some programmers have daily selection, "while eliminating circuits".After this was in use, Network schedules would change, and the program had to be over ridded
in some manner.I added wireless controls so the people could control this, from the down town office to the mountain top, where the towers were located.
I built several of these, and was certainly tired of cutting the hook up wire into short pieces,
all 1800 feet, in each unit.One could have made CS on the mountain top, started and stopped the batch, with wireless controls.
The third and simpler device relates to the use of telephone leased lines, they served their purpose, had their day, and many are still in use. Digital Communicators have replaced most applications.
The phone company is notorious for messing up their own circuits.
While working on yours, ...... they cross mine, of leave it
disconnected at times.
Yes, I added LEDS, and switches to fix their mistakes, near instantly. The use related to water tank pressure, a simple application.Many cities, counties, have multiple water tanks and wells. ( remotely located )
For many reasons, they like to know when the tanks are empty, or the pressure is low. Nothing to doing that, of course. I could have monitored much more than pressure.
These panels reported to a UL listed Central Station receiving panel. My part was not UL listed but worked just as well.
These panels worked very well, and have for 20 years. A little trivia some do not know.......... 1 foot of water ( often called 1 foot of head ) produces .433 psi Stated another way, 1 psi is equivalent to 2.31 feet of head Still another way, It takes a column of water, 231 feet to produce 100 psi. I talked with some City water system engineers a few months back.There was much about water, they did not know. Not sure what kind of Engineers they were.
That is the cruel world today.Now,.......... how many more ways do you want to make CS. I only told you a few. <grin>
I do not claim any of these to be the best. Wayne ========================== -- The Silver List is a moderated forum for discussing Colloidal Silver. Instructions for unsubscribing are posted at: http://silverlist.org To post, address your message to: [email protected] Address Off-Topic messages to: [email protected] The Silver List and Off Topic List archives are currently down... List maintainer: Mike Devour <[email protected]>
