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PLCs, PICs, and SBCs

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A few resources for Programmable Logic Controllers, Peripheral Interface Controllers, and Single Board Computers

Introducing the PIC. Many people would like to get started with microcontrollers, but don't know how to begin. That's what this page is all about -- how to get started. With a microcontroller you can do things that would be difficult to do with discrete logic. Besides its power, you can easily "change your mind" with a microcontroller -- something you can't do with discrete logic. The PIC isn't for every project. What are some things people have done with a PIC? There are several steps you need to take to get started: 1) Select a PIC 2) Assemble the tools you need 3) Learn to program In truth, if you just want a learning experience, you can download a free simulation environment from Microchip and practice programming without spending any money or buying any chips at all.

Since this was written, two things have changed. The other big difference is that the PIC16F84 is pretty much obsolete now. PIC microcontroller tutorial. CLICK here for a quick PIC microcontroller tutorial PIC microcontroller is very convenient choice to get started with a microcontroller projects. In this tutorial we will study: PIC microcontroller introduction A Microcontroller is an inexpensive single-chip computer. The microcontroller’s most important feature is its capabilities of STORING and RUNNING a program. Every Microcontroller (also MCU) consists of several major units: Input / Output Ports Control Pins: reset, power, clockProcessor (CPU) Memory (RAM, ROM, EEPROM) Serial and parallel ports TimersAnalog-to-digital (A/D) and digital-to-analog (D/A) converters Characteristics of the RISK (Reduce Instruction Set Control) system: Instruction set of 35 commandsInstructions are carried out in 2 clock cycles You can calculate the execution time of the command in accordance with the frequency clock (if the frequency clock is 20Mhz, execution time of a command is 200ns)The ports of 28/40/44 pins microcontrollers are the same.

PIC Programming-What Will You Need - Microchip PIC microcontroller. PIC Programming-What Will You Need Before we begin with the learning, i will make you a list for the things that you need to have, in order to follow succesivelly the next pages. It is important to have the same things that i use for the tutorials, as it will make your life much easier. Though all the code and theory could be applied to almost any 8-bit PIC micro, they would require most of the times slight changes to operate as in the tutorials. If you feel free doing such changes, then feel also free to use any other material.

The PIC At first, the PIC. I will always use the PIC16F88 for the tutorials. A breadboard A breadboard of course. A set of resistors, capacitors and LEDs it would make the life over your workbench much easier, if you have a nice set of resistors, capacitors, LEDs and transistors always available. A power supply A 5 VDC power supply shall be needed. A PIC programmer The market is filled with those. MPLAB or another platform Previous page ---- Next page Comments. Introduction to PIC - PIC Microcontroller Tutorials - PIC Tutorial Resource - Connect to the PIC. Introduction Welcome to the start of the PIC Tutorial. These pages will take you form the basic structure of the device, right through to programming methods and techniques.

Also, there will be suggestions on how to modify the code so that you can adapt the PIC to suit your applications within Cybot. We will not be including any internal architecture diagrams, as this may only lead to confusion. If you want to look at the datasheet, then this can be downloaded from Microchips' web site.

To start, let us take a look at the PIC. Microchip PIC 16F84 Microcontroller Microchip manufacture a series of microcontrollers called PIC. There are several ways of programming the PIC - using BASIC, C, or Assembly Language. The 16F84 Pins Below is a diagram showing the pin-outs of the PIC 16F84. RA0 To RA4 RA is a bidirectional port. RB0 To RB7 RB is a second bidirectional port. VSS And VDD These are the power supply pins. OSC1/CLK IN And OSC2/CLKOUT This is an input pin which can be monitored. Programming. Microchip provides quick, secure and inexpensive programming solutions to our clients: Programming formats for PIC® microcontrollers Add code to your devices that were purchased on microchipDIRECT Application notes and Source code Programming Formats for PIC® Microcontrollers Flash (Electrically Re-programmable) Flash PIC microcontrollers allow erasing and reprogramming of the program memory in the microcontroller.

Re-programmability offers a highly flexible solution to today's ever-changing market demands and can substantially reduce time to market. One-Time Programmable (OTP) OTP PIC microcontrollers are manufactured in high volumes without customer specific software and can be shipped immediately for custom programming. In-Circuit Serial Programming™ (ICSP™) Microchip's Flash and OTP PIC microcontrollers feature ICSP capability. Self-Programming Microchip's PIC16F87X family features self programming capability. Quick-Turn Programming (QTP) Serialized Quick-Turn Programming (SQTPSMSM) PIC Programming › Getting Started. This section deals with the basics of PICs - this is where you should start if you have no idea what a PIC or a microcontroller is. From here, you can build yourself a PIC programmer, download code to make your PIC do something, and configure your PC to provide an environment suitable for PIC program development.

From there, we start to write assembly language programmes. This section forms an introductory tutorial that equips you with the foundations necessary to begin writing your own projects. If you've already got this far, then you might find my applications section useful. In this section Introduction - what is a microcontroller? Programming PIC Microcontrollers. Before doing any programming the first step is to build the hardware. Although the PIC18F portfolio is very large, many of the chips have several commonalities. For more detailed information see the "Guidelines for Getting Started with PIC18Fxxxx Microcontrollers" section in your devices datasheet.

For detailed pin-outs of the PIC microcontroller see the "Pin Diagram" section in your devices datasheet. Note: VDD = Positive Voltage and VSS = Ground. Connect the MCLR pin through a 1kΩ resistor to VDD. Get C.H.I.P. - The World's First Nine Dollar Computer. Pandaboard. Gumstix, Inc. Home. Raspberry Pi - Teach, Learn, and Make with Raspberry Pi. Microcontrollers, Connectivity, Memory Solutions | Cypress Semiconductor.

Analog Devices : Analog Dialogue : PLC. A programmable-logic controller (PLC) is a compact computer-based electronic system that uses digital or analog input/output modules to control machines, processes, and other control modules. A PLC is able to receive (input) and transmit (output) various types of electrical and electronic signals and use them to control and monitor practically any kind of mechanical and/or electrical system. PLCs are classified by the number of I/O functions provided. For example, a nano PLC incorporates fewer than 32 I/Os, a micro PLC has between 32 and 128 I/Os, a small PLC has between 128 and 256 I/Os, and so on. A typical PLC system is outlined in Figure 1.

Figure 1. PLC systems comprise input modules, output modules, and input/output modules. Resolutions of I/O modules typically range from 12 bits to 16 bits, with 0.1% accuracy over the industrial temperature range. Two architectures are commonly used in PLC-system analog output modules: DAC per channel and sample-hold per channel. Figure 2. Parallax Inc | Equip your genius ® Outcome1. PLC Basics. Since the late 1960's, the Programmable Logic Controller (or PLC) has become an essential aspect of any automated manufacturing process. In recent times there have been contenders to replace the PLC but the priniciples and popularity of those early PLC's functions and concepts have continued unabated.

It is essential for many people from the technician to the engineer to understand these essential pieces of equipment. PLCDev has developed this instruction manual "PLC Basics" in hopes it will serve the beginner to the advanced user. Our goal is to make it comprehensive as possible, providing not only the generic principles in all PLCs, but to give practical examples from many different PLC manufacturers. To this end you are welcome to comment on each section by registering as a user and clicking the "add a comment" link at the bottom of the page. "I'm writing a book. It's always good to get an overview of where designs have been and were they are going. What is a PLC? A Simple Example Octal. Introductory PLC Programming. Introduction[edit] What is a Programmable Logic Controller (PLC)? [edit] A Programmable Logic Controller, or PLC, is more or less a small computer with a built-in operating system (OS).

This OS is highly specialized and optimized to handle incoming events in real time, i.e., at the time of their occurrence. The PLC has input lines, to which sensors are connected to notify of events (such as temperature above/below a certain level, liquid level reached, etc.), and output lines, to which actuators are connected to effect or signal reactions to the incoming events (such as start an engine, open/close a valve, and so on). The system is user programmable. Some other languages used include: Sequential Function chartFunctional block diagramstructured TextInstruction ListContinuous function chart Before the PLC, control, sequencing, and safety interlock logic for manufacturing automobiles was mainly composed of relays, cam timers, drum sequencers, and dedicated closed-loop controllers.

Input scan. List of PLC devices, meters and regulators. Your Personal PLC Tutor - Learn PLC Programming Here. FREE.