LicheePi Nano: high-performance SD card sized Linux board based on an ARM9 core

The diffusion of the A10 Cortex A8 processor did not stop the ARM9 market of the Allwinner F series. Since its foundation, Allwinner has released several SoCs for use in Android tablets, as well as in smartphones and camera systems. The A10 was the most successful Soc of Allwinner. The chip was mainly used on Android and Linux keys, even with tablets under $ 150 such as Ainol Novo 7 Aurora (India). The proc ...

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MMC/SD Card raw data read with PIC16F887 microcontroller

Interfacing MMC/SD card with PIC16F887 This small example shows how to read SD card raw data (bytes, sectors ...). SD card raw data means that there is no use of system files like FAT16 or FAT32. Serial monitor is used to display the data after reading it and here the UART protocol is used. the link below shows a small PIC16F887 MCU UART example: UART Example for PIC16F887 microcontroller using CCS PIC C co ...

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Read text files from FAT16 SD card with PIC16F887

Interfacing PIC16F887 with FAT16 SD card After reading raw data (bytes and sectors) from SD card, now I'm going to use FAT16 file system to read and print text file located in 2 GB SD card. Read SD card raw data topic: MMC/SD Card raw data read with PIC16F887 microcontroller UART protocol is used to display the content of the text file. For this project, I used MMC/SD card driver for CCS C compiler which ca ...

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Wave audio player using PIC16F887 microcontroller

This small project shows how to make a simple wave audio player using PIC16F887 microcontroller and SD card. The WAV audio file used in this project is 8000 Hz, 8-bit stereo (2 channels). Hardware Required: PIC16F887 microcontroller SD card (formatted with FAT16 or FAT32 file system) ASM1117 3.3 voltage regulator Audio amplifier (ex: PC speaker, LM386 ......) Speaker 20 MHz crystal oscillator 2 x 22pF ceram ...

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SD/SDHC CARD SOUND RECORDER

Updated on 30.6.2015 The PIC16F876A's ADC digitizes the sound and store it in the SD or SDHC card. The firmware works for SD or SDHC cards only, for old SD (before 2009) use ver1 firmware. Do not use SDXC cards with this project because some of them work on 1.8V drive. The code detects whether the card is SD or SDHC and selects the proper addressing system for the card. The PIC's CCP is used as a DAC to con ...

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USB Audio Streamer A Microchip PIC based USB sound card

INTRODUCTION The idea for creating a USB sound card based on a PIC came from discussions of other people creating one on the Microchip USB forum. The hardware of the card is based on all Microchip products. The software uses a modified version of the Microchip USB framework which is interrupt driven instead of the traditional polling. The device is a USB composite device. The first device is an implementati ...

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Connect Flash Card with PIC18F4520

The Compact Flash Library provides routines for accessing data on Compact Flash card (abbr. CF further in text). CF cards are widely used memory elements, commonly used with digital cameras. Great capacity and excellent access time of only a few microseconds make them very attractive for microcontroller applications. In CF card, data is divided into sectors. One sector usually comprises 512 bytes. Routines ...

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Connect Memory Card using PIC18F4520 Code

The Multi Media Card (MMC) is a Flash memory card standard. MMC cards are currently available in sizes up to and including 32 GB and are used in cellular phones, digital audio players, digital cameras and PDA’s. mikroC PRO for PIC provides a library for accessing data on Multi Media Card via SPI communication. This library also supports SD (Secure Digital) and high capacity SDHC (Secure Digital High Capacit ...

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Logic PCB Business Card

About I've seen PCB business cards for a few years now on Hackaday, and I figured it was time to design one of my own. Most PCB business cards involve a microcontroller. I wanted to do something a bit different, so my card performs its intended function strictly with digital logic gate and D-type flip-flop (DFF) ICs. Design The card implements a digital finite-state machine which displays the next character ...

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Making a PCB Business Card

Many of you may have seen the Adafruit PCB ruler (also used by the awesome Voltera). The design was actually adapted from my own design back in University! To improve on the original idea, I have created a reference business card.   Here is a computer render of the design: PS. The dots on the front are the phone number in braille, the dots and dashes are Morse for the website, cause who doesn’t surf th ...

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