delabs circuits
Electronic Engineering Schematics
Digital Timers Counters and Clocks
- Six digit preset counter 4518 - pdf
- Six digit preset counter control - pdf
- Six Digit preset up-down counter 4029 - pdf
- Six Digit preset up-down control - pdf
- Six Digit preset up-down block - pdf
- Sequential Timer
CD40xx - pdf
- Sequential Timer/counter 7217, pdf
- CD4060 CD4020 long duration timer.
- Timer Clock
Preset Thumbwheel Switch
- 1 Hz - 1 pps clock CD4060 32768 Hz Crystal
Timers and Counters along with Analog Process Controllers formed the front end of Industrial Automation. Even today automation systems and control panels use analog timers and electromechanical counters. These are Indispensable. Analog + Digital combination controllers came next which were little bigger and offered better stability. They had thumbwheel switches as user interface in place of potentiometers.
Designing Mixed Analog Chips and Circuits
uP based Systems with chips like 8085 came after that, they consumed more power and were big in size. The coming of Cmos uC like 80C31 made Process Instrumentation Small and SMD made even 48 X 48 DIN sizes possible. Now Analog and uC based designs are used in different applications. Digital Hybrids and uP instruments are not used as they were Transient-Technology Methods.
Multi-Instrument Digital Assistant
Multi-Instrument Digital Assistant - PIC16F84A - "It contains four instruments in one unit: logic probe, single channel logic state analyzer, frequency counter and serial code receiver."
Logisim -Simulate Digital Logic Circuits
What are Thumbwheel Switches
Thumbwheel switch, which has BCD output. It is used to Preset Values in Digital Instruments. Before Microcontrollers and RAM this was the Input device. Even now in industrial instrument this is a simple input device. Binary and Hexadecimal System
Selector or Thumbwheel Switches from CHERRY
More Digital Circuits
...
...
...
...
...
delabs Technologies
20th Apr 2020
...
Disclaimer and Terms of usage
The documents, software, tools and links are provided to enhance the ability of an electronics student, hobbyist or professional by sharing information. The information, links etc. should be used by the website visitor, at his or her own risk and responsibility. There may be concept, design and link errors in the pages.
Creative Work, ideas and documents of delabs can be used for Product Design and Development by R&D Engineers, Hobbyists, Students and even firms for creating useful products. These cannot be used for reprint, replication or publishing online or offline.