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.
This is a PID Controller based Control Panel using a PLC. The Computer
is a 386 40MHz with 40MB HDD. The printer Epson dot matrix, The
worktable is an inhouse design made of steel and plywood, capable of
withstanding heavy loads.
You can also see a Stripchart recorder for the temperature logging and
PID curve study. This controls a Steam Valve with 4-20mA output.
All Timers are 1 - 30 Secs Analog with Presets to adjust with a
screwdriver. The Switch, Solenoids and Power supply has to be via
terminal blocks or plug-jacks. The PCB may be upto six Square Inches for
standard DIP components but with SMD it may be smaller.
Four Channel Temperature Alarm Docs
The temperature in a pipe is monitored with four RTD Pt-100 Sensors, The
type of probe could be Extruder RTD probes with Bayonet or Compression
Fitting, Get it from Omega. To keep costs low you can choose small thin
film RTD sensors, they will be fast but on rough usage may break.
The time taken to measure the temperature at the 4 points will be less
than 4 seconds. An optional display of the measured temperature as shown
above can be avoided by using a DMM to adjust the setpoint.
The Analog Timer Module can be set from 0- 30 minutes. If out-a remains
high even after set time a out-b alarm goes on to sound a buzzer and
flash a LED light.
The best part of the 555 is that it has an voltage detection. It has a
Versatile Logic which is defined by voltage comparators. The ability to
loop it like an opamp for feedback makes it the first "Programmable"
Mixed Chip. In short it make an ideal building block.
Signetics made the 555, This is one IC that is like a E-LEGO, this along
with Op-Amps and other components can make many interesting projects.
On some pins like Control Voltage it responds to analog signals and on
Reset and Output the signals are Digital like. The 7555 a CMOS version
consumes lower power and oscillates at higher frequencies.
I am now Organizing and Updating my main product design sections. Many Useful Websites and Nice Firms have gone over the last few years. I had to update to remove many broken links and improve navigation. These parts of my websites partially represents my Test-Measurement and Instrumentation firm i ran for some years. It also contains many of my designs and circuit innovations from my early days.
2020 - The HTML pages are now Responsive from Computer Tablets, Notebooks to Large Monitors. All sites are SSL means https: Private and Secure.
In 1999 most of my circuits in Image and PDF Formats were uploaded as zip files in free websites of Netscape and Tripod. Then i got suggestions, Feedback and Thank you letters from all round the world. Later some support, encouragement from enthusiasts and engineers in the US and Europe made me improve the Websites "CMS" and content organization. I am now updating my Plain old HTML Pages for the 4th time in 18 Years. (2018)
This is a curated list of EE Pages from delabs websites and blogs. It is an attempt to organize delabs created ee reference pages in one place.
Analog Product Design - Here are design aspects of circuits using Op-amps and Comparators. Discrete Semiconductor Circuit design like using Transistors and Diodes. RLC parts.
Electronic Design - Things related to Electronic Design in all its
aspects. That includes the prototyping, mechanical, electrical and PCB.
Product Safety, EMI-RFI, Reliability and Robustness.
Systems - This Section is related to Microcontrollers and Related
Resources. Microcontroller, SOC, FPGA, ASIC. From 80C31 to the Latest
chips will be the scope of this section.
Electronics - The design of Power Supplies, DC to DC and AC to DC
Convertors, SMPS, High Voltage and High Current equipment. Mosfets,
Thyristor, Schottky Diodes, Ferrite Magnetics and Chokes are the various
Components Materials - Electronic
Components and Engineering Materials. The parts, kits, tools that are
used in designing and manufacturing electronic products. The Mechanical
Nuts-Bolts and Raw Materials used in Electronic Manufacturing.
Measurement is everything, and an Oscilloscope is a EE Stethoscope.
delabs Technologies - Product Design - Industrial Automation and Instrumentation. delabs Technologies uses the brand names delabs and dapj in its Web Services and Resource Sites. These together form an Electronics Informatics and Product Design Technologies Web Consultatory.