AT Keyboard Interface V1.04 using PIC16F84

Introduction Sometimes you only need a simple and cheap RS232 terminal to get sufficient control over a PC or a RS232 device. There is no need, no space or even no power to place a monitor, a computer case and a keyboard. Maybe there exists also the problem, that the PC or the device is located somewhere else and you want to interact with it over a short distance. The cheapest way to obtain a complete user ...

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HandySwipe portable magnetic card reader using PIC16F688

The HandySwipe provides a portable magnetic card reader interface and display. It collects card data from a “Type 2″ card reader (shown here), and displays the data on a small character LCD screen. Type 2 stripes are by far the most common in use, such as on credit cards and drivers’ licenses. The device can store up to 50 cards, runs on four AA’s, and has a serial connection to download its memory to your ...

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LCD interface with Microcontroller PIC: Beginner’s guide using pic microcontoller

How to interface LCD (Liquid Crystal Display) display module to PIC microcontroller? LCD is a passive component, that is it does not make any light but just modifies the light passing through it for alphanumeric displays. LCD is exclusively manufactured to be used with microcontrollers, which means that it cannot be triggered by usual IC circuits. This embedded program shows how to connect PIC to LCD displa ...

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50 MHz frequency counter, voltage meter & SWR/PWR indicator using PIC16C71

Circuit schematic PCB HEX code, V1.11 (operates with 4,000 MHz quartz) Hex code, V1.12 (operates with 4,1943 MHz quartz) PIC config bits   Photo - Top view Photo - Bottom view Photo - Latest PCB version with TO-92 style 78L05 housing - Top view (132 kbyte) Photo - Latest PCB version with TO-92 style 78L05 housing - Bottom view (138 kbyte) This is a successor of the PIC16C71 4-digit LED f-counter & ...

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TD-USB-01 interface with mouse sensor board using PIC18F2550

This is an example USB project showing how to interface an optical mouse sensor (the ADNS-2620) with a standard XP/Vista computer. The TD-USB-01 board with a PIC18F2550 communicates with: the PC: USB 2.0 through a mini-B connector. the mouse sensor board: SPI over 4-wire flatcable. Here are the technical specifications: PC Win XP/Vista interface application with Visual C# 2008 Express: free download. TD-USB ...

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2-Wire Keypad Interface Using a 555 Timer using PIC16F628A

Keypads are a very commonly used input device in microcontroller-based systems. In a keypad, multiple switches are arranged in rows and columns so that they could be interfaced to a microcontroller with a minimum number of I/O pins. For example, a 12-key keypad is arranged in a 4×3 format, which allows to interface the 12 keys to a microcontroller with only 7 connections. The location of each key on the key ...

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Matrix Keypad interfacing with PIC microcontroller.

Matrix keypads are very useful when designing certain systems which needs user input. These keypads are constructed by arranging push button switches in rows and columns as shown in Fig.1. Scanning keypad to detect pressed keys involves several steps and there are several methods to achieve this. The method presented here is capable of detecting more that one key press at time and encode that information in ...

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How to use a 74HC595 Shift Register with a AVR ATtiny13

Intro: How to use a 74HC595 Shift Register with a AVR ATtiny13 If you have been playing with microcontrollers and electronics then you have likely seen LED dot matrix displays and other projects that use shift registers like 7-segment displays and more. This instructable goes over a quick intro to the 74HC595 8-Bit Serail to Parallel Shift Register with Latch and how to interface it to an AVR ATtiny13 to fl ...

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LED Interfacing with PIC Microcontroller: Embedded C program with circuit using pic microcontoller

How to interface LED with Microchip’s PIC microcontroller? How to connect LEDs to a PIC microcontroller? LED interfacing is the stepping stone for microcontroller development. This is a simple embedded program for PIC 16F877A to interface LEDs, suitable for beginners who wish to study basics of embedded microcontroller programming. The program is developed through Micro C compiler, one of the best solutions ...

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DS1820 Temperature regulator using PIC16F628

This simple project uses a Dallas DS1820 one wire temperature sensor and a pic 16f628 microprocessor. A simple temperature regulator where a LED symbolizes the Fan. Data derived from the DS18s20 is a 9bit centigrade temperature measurement. As mentioned the temperature sensor communicates over a one Wire bus that requires only one data line and ground for communication with a central microprocessor. The DS1 ...

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