Electronics Engineering Magazine

Thursday, December 03, 2015

The Future Landline Phones

Early Innovations on Landline Phones were Answering Machine, Music-on-Hold and Fax Machines. Later landmines were used for BBS and then DUN (Dial up Networking) Internet. Then came the Big Freeze.

My first data experience before the internet was Delrina WinFax. It helped one of my friends get a job in Europe too. A fax machine was expensive, a Gateway 2000 modem was not. (this modem took me first online at home)

The Future Landline Phones

Cable Internet, Broadband Internet and 3G etc. have pushed the Landline phone in a corner.

I am using Internet on my Landline and it is pretty good. This may not be affordable by all, as a PC or Laptop is needed and the extra Broadband charges. This is just using the same line. My LandLine phone still is UnEvolved.

What i am trying to say is .....Add SMS at least for all Landlines with no extra monthly cost other than the SMS cost. If Possible add a means of slow File Transfer like FAX. A USB port on this device below will do.

This will help many use Data on the Telephone lines without buying a PC or Fax machine. The SMS will be a Super Hit. Voice Mail can alo be done. No Internet required. Let a affordable Android phone replace the Landline.

The most financially stressed families in the most remote locations can SMS and if possible send their JPG photo or resume over the Normal Phone Connection at only the extra cost of data transfer.

I got my a Landline a few days back, The phone was one with a LCD, It is a very nice phone with a large LCD, but i had trouble using the phone book, as i kept forgetting the sequence.

These Landline phones occupy a prominent position on the desktops of all offices. The CEO, Marketing Manager and Purchasing Officer; or even at the Canteen, we see these phones. The potential for marketing and advertising is good in these, as they are still popular in the office environment. A firm can show its flash presentation or a product catalog, when a customer waits for the despatch details of a product he ordered.

A Landline Phone also may be interesting with a touch screen and built in web browser. This phone can also have the option of WiMax, in areas where it is available.

This was posted around 2007-8 in a Blog Nomadic Computing and later in delabs Design Devices.

Wednesday, December 02, 2015

Multi Zone Temperature Controller

This was one unique custom design i made for a Mining Company for Ore Processing. It was Multi Zone Scanner controller.

Multi Zone Temperature Controller

It might have been for a rotary kiln of a large size. Four temperature sensors were connected to the system with brushes just like in a motor. Even the supply to the trasmitters was on the brushes.

The Instrument had a Analog Multiplexer with a Synchronous Sample and hold, as the analog value was coming via the brushes. It had four relays that would turn off or on every scan cycle, depending on the input values. The kiln system was slow it had inertia, so it did not require a fast acquisition for 'Real time' as you may find necessary in small Thermal Systems.

This was built with analog and digital chips, no uC in this design. This was because it was a front end controller, there was a risk of a uC system getting stuck. These days, that problem may not be so worrisome, but i am not so sure.

What if the watchdog goes for a short nap?

You can find part of the designs here - Industrial Process Control Circuits