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1. Infrared proteus library elms software#
2. Infrared proteus library elms code#
3. Infrared proteus library elms free#

This wave player has the same characteristics as the wave player with PIC16F876A. SD/SDHC CARD FAT32 WAVE PLAYER 3.3V PIC16F690 The programming of the pic can be with 3.3V, if you have a pic programmer for 5V only remove the SD card while 5V is connected to the circuit, 5V will damage the SD card.

Infrared proteus library elms free#

I left pins 2 and 3 free in case I have to use crystal oscillator. It also makes it easier to power it from a battery.ĨMHz internal oscillator is used, if the frequency drifts it causes the playback to change speed. This makes the direct drive of the SD card simpler. The difference is the supply voltage is 3.3V. This sound recorder has the same characteristics as the sound recorder with PIC16F876A. SD/SDHC CARD SOUND RECORDER 3.3V PIC16F690 Save the files as 22.050KHz, 8 bits, mono. Name the files with short names, 8 low case characters max.

Infrared proteus library elms software#

Drawing is included with the software zip.

The circuit diagram is the same as the SD Sound Recorder minus the components for recording. The software searches for files entries in the root directory only, it streams any file type without reading its name or type. The sound quality is OK for speech or medium quality music. The bytes from the file are streamed to CCP1 (PWM mode) and with an external low pass filter you get the audio.

The software can play only PCM 22.050KHz, 8 bits, mono. The software has the functions needed to read SD/SDHC card formatted in FAT32. You are free to use the circuit diagram and software with no The software doesn't use any file system, it uses absolute memory addresses (raw).Ĭard has to be FAT32 formatted. The Error LED indicates error of communication with the SD card. Reading and writing data is in multi-blocks. SD card interfaces the microcontroller in SPI mode. I added a simple 2 transistors amplifier to boost the power to drive 32 Ohm speaker or headphones. The PWM gives 64KHz wave with duty cycle modulated to the audio amplitude. The 0.65V bias to the ADC input is for setting the signal to the low byte of the converter output.Īudio input is 1Vp-p, you can use the mic circuit or another source. During recording the ADC converts the audio to 10 bits, the low byte is streamed to the SD card. Timer0 in Fast PWM mode is used as a DAC to convert the digital data back to audio. The ADC sample the input at 10K s/sec, 8 bits mono in a format similar to. The firmware works for SD or SDHC cards only. A low pass filter removes the 20KHz component.

The CCP in PWM mode gives 20KHz wave with duty cycle modulated to the audio amplitude. Since the programme is less than 680 bytes there is much resources left for adding features.Īudio input is 1Vp-p, you can use the mic circuit or other source. The software doesn't use any file system, it just uses absolute memory addresses (raw).

The Error LED indicates error sent by the SD card. The sound is converted to 20KHz 8 bits mono in a format similar to. The PIC's CCP is used as a DAC to convert the digital data back to audio.

Infrared proteus library elms code#

The code detects whether the card is SD or SDHC and selects the proper addressing system for the card. Do not use SDXC cards with this project because some of them work on 1.8V drive. The firmware works for SD or SDHC cards only, for old SD (before 2009) use ver1 firmware. The PIC16F876A's ADC digitizes the sound and store it in the SD or SDHC card. For SD with PETIT FAT File System see SD Bitmap projectįor sound playback with EEPROM see Doorbell