Circuits & Schematics Microcontrollers Usage: pic - 8

71. 2-Wire Keypad Interface Using a 555 Timer. Part 1 Theory and Schematic
    Circuits Microcontrollers Usage
    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 ...
    25-03-2011

72. Rotary Encoder Demonstration
    Circuits Audio Microcontrollers Usage
    .. connected to the microcontroller with individual pull-up resistors on each input. In this project I used RB4 and RB5 on the PIC to connect the encoder; this has 2 advantages, firstly you can use the PORTB internal weak pull-up (which means you ...
    25-03-2011

73. Heart rate measurement from fingertip. Part 2. Software
    Circuits Medicine Microcontrollers Usage
    Part 1. Schematic Software The firmware does all the control and computation operation. In order to save the power, the sensor module is not activated continuously. Instead, it is turned on for 15 sec only once the start button is pressed. The ...
    14-03-2011
74. PIC USB Development Board
    Circuits Interfaces Microcontrollers Usage
    .. the code. You simply need to compile the PICDEM FS USB projects which are included with the stack examples. Building the PIC DEM FS USB board The circuit schematics for the original board are available on-line from Microchip, they publish ...
    26-02-2011
75. Heart rate measurement from fingertip. Part 1. Schematic
    Circuits Medicine Microcontrollers Usage
    Introduction Heart rate measurement indicates the soundness of the human cardiovascular system. This project demonstrates a technique to measure the heart rate by sensing the change in blood volume in a finger artery while the heart is pumping the ...
    11-02-2011
76. Programmable digital timer switch using a PIC Microcontroller
    Circuits Automation Microcontrollers Usage
    .. be turned off again. The following video shows how to do this. Software The firmware is developed using the MikroC Pro for PIC compiler. Downloads Source Code - download HEX file - download embedded-lab.com
    10-02-2011
77. Real-Time Audio Spectrum Analyser. Part 2. Firmware
    Circuits Audio Microcontrollers Usage
    Part 1. Schematic and construction The firmware is completely written in C and can be downloaded from the downloads section below. The firmware is split into 4 parts: ADC Sampling The ADC sampling routine samples the voltage level on RA0 every 50 ...
    02-02-2011
78. Dot matrix LED running display. Part 2. Construction.
    Circuits Microcontrollers Usage
    Ivailo Vasilev Brightness settings The user can select the brightness level in 8 steps or select an auto mode. To change the brightness from Settings menu, select Bright and press SET. The display will show the current bright level (from Bright 1 ...
    01-02-2011
79. Solar Recorder. V1.0.
    Circuits Measurement Microcontrollers Usage Solar
    .. with a PIC18F458 and the 128MB Multimedia Memory Card, MMC. The solar radiation is measured by a calculator solar cell. The PIC chip interfaces the MMC using SPI mode. The interval between samples is set to one minute. The firmware detects the ...
    19-01-2011
80. Real-Time Audio Spectrum Analyser on PIC18F4550
    Circuits Audio Measurement Microcontrollers Usage
    .. board): The picture shows a full-volume 5000Hz sine wave generated by a PC. If we were to feed this signal directly to the PIC we would only have a very small range of input voltage (0-0.5V) and also we would only be able to sample the ...
    18-01-2011

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