Showing posts with label delabs-Portfolio. Show all posts
Showing posts with label delabs-Portfolio. Show all posts

Monday, July 03, 2017

Usability and Accessibility Enhancements

Tablets have tools for Communication, Browsing and Many Utilities. It needs to be usable by very old people and very young ones as well.  They need to be affordable and Robust too. Ability to survive falls, Grime, Water and Heat. It should be usable by people having Health issues too.

Usability and Accessibility Enhancements

Alert sounds likes chimes and rings are not enough, The Tablet must be able to yell and scream when it is far from the owner. The user needs to wear  a Bluetooth pendent with microphone .

When charge is low, it has to create a tantrum till it is fed...up. Some pricey models can have tiny wheels to move to the closest charging bunk. Some Vacuum Cleaners are able to move and recharge themselves.

When a SMS lands, it is able to read out loud and take a reply by voice and send it at once. Similarly the email could work on the tablets, all hands-free. The speakers and quality audio are on the tablet/pad and the pendent is just an additional microphone with bluetooth and vibrator with a titillate option.

Incoming  calls can move in tandem with an answering device and make loud Audio Visual Effects to get the attention of the Owner. The caller cannot wait, so the answering machine takes the call, says "please wait" and then rings the Alert Alarm Bells and even vibrates the Pendent. The Senior now can talk to the pendent and will get the caller's voice loud on the Phone. The Phone Audio has to be very good and loud.

If the room has a connected HD Monitor, even that can be used for the communication purpose. The user just needs to click the pendent to answer a call or video chat with family friends. In Business too, Large monitors and Loud Speakers can improve communication.

Smart PowerPacks or PowerBanks+ can be the Charging Stations. The Power Packs with docks can have the wheels and intelligence to recharge the device on alert, they will also recharge themselves from the mains power, whenever required.

Expensive Phone or PowerPack Models can have Drone Mode. I say this emphatically because the Dilbert Dupey develops wings after the mutation, This indicates that quad-copters, drones were predicted. It could be that, One fine Day the Tablet+ may Fly!

Aug 2014

delabs design Notes - 2008 to 2018
delabs Technologies

Sunday, July 02, 2017

Online Security in Embedded Systems

These days many gadgets with embedded systems are being used. Tablets, Netbooks and Desktop Clients. Many of these are used to make secure transactions like Banking. It is also used as a Security Device for Web Applications and Website Memberships.

The secure transaction process has improved. I know there is encryption and also the NIC number of Ethernet cards etc. I have some thought, i think i will note it here. In one sentence "Make Every CPU Chip Unique with a Unerasable ROM ID Code or Signature" this can also be tied to a QR Code. A Firmware query spawned by a SSL TCP/IP action will return the CHIP ID which enables secure communication and device tracking overriding all user controls.

Online Security in Embedded Systems

Processor manufactures and Chip IP makers are standardized. The Secure CPU makers should obtain a license for secure CPU, which will be a CPU but with a Secure Transaction Chip with Unique Identification Code engraved within. Each Chip is unique and a replacement of CPU needs new authentication for all transactions. No two chips are made the same, the unique numbers are not on flash (like BIOS), but digitally etched-burnt with indelible e-ink. So when a person makes transaction his computer is more securely authorized. More security options like GPS in CPU for big transactions, these computers will be expensive too.

(First posted in delabs Notes 2006 - Then in Nomadic Computing 2007)

delabs design Notes - 2008 to 2018
delabs Technologies

Monday, January 04, 2016

PLC based PID Controller

Below is a Electrical Control Panel, It has a Strip Chart Recorder which is electro-mechanical, It has a PLC Inside. A handheld PLC Programming unit. The computer is showing the Ladder Logic Program. PLC is based on a embedded uC. The DIN Controllers are Analog + Digital circuits. So you see it is a Electrical Control Panel with Electronics and the PLC Ladder Logic means, Software too.

Process Control Application Notes

This is a PID Controller based Control Panel using a PLC from GE Fanuc Automation. The Computer is a 386 40MHz with 40MB HDD.

PID Controller PLC

Electrical Control Panel Wiring

Multizone Process Scanner

This could take current or voltage inputs from many remote transmitters, 4-20mA or 0-1 V Inputs. Then it would display the calibrated value in a LED display. The Zone number was a digital display. This serves as a monitor of process values. It had a analog output with a digital channel byte-word output for interface with other instruments.

This uses the CD4051-52 for the analog switching. Operating this at +/- 7.5V gives best isolation from channels and low ON resistance. Now you have many types of devices to do this.

Multizone Scanner

When a large area or object has to be heated, many heaters are used. This device can monitor and display the temperature at various points. The Operator then can make adjustments in heating or cooling so that he can maintain Uniform temperature or a Temperature Gradient as specified by the Process.

There are many ways, these scanners are used. Many different parameters like pressure, temperature, level are measured with different sensors and converted to a 4-20 mA level using transmitters for each sensor. Then many parameters can be measured in one equipment, when it needs only periodic attention. As the scan rate can be set from 1 to 50 seconds, the operator will be able to keep a tab on the values or record it. This reduces the real estate required on the control panel. Then the control room can be small, as it has to be at a vantage point, with a birds view of the entire factory floor.

Industrial Process Control Circuits

Wednesday, May 14, 2014

Three Point Preset Counter

This is a prototype of a Preset Counter. It is built with ICM7217. The cabinet is ABS Plastic DIN 96-96. The Panel is Engraved on Acrylic. I don't remember for which application it was used. It has three thumbwheel settings, when the proximity switch counts upto the set-value, the corresponding relay turns ON, with a State Indicating LED on front panel.

Three Point Preset Counter

These can be configured sequentially or to work synchronously, this depends on what customer wants. Both modes may give the same result. In sequential operation, Some of these counters-timers may need to wait for an external trigger or feedback from a limit switch or another process like pressure alarm. Then more Input options may have to be provided.

Counters, timers, analog-process and its interconnectivity makes up the various process loops or chain-reactions in Machine control. The various types of sensors for measurement and feedback of analog and event parameters, monitor the mechanical system and communicate the data to the process instruments. The Actuators like Drives, Solenoids, Pumps, Valves and Heaters act in accordance to the commands of the control system. This regulates and manages the process or machine to deliver consistent and repeatable yield of the end product.

Read More here - Digital Timers, Counters and Clocks