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Voice recorder/playback circuit - Electronic Circuits and ...
https://www.circuitstoday.com/voice-recorderplayback-circuit
The circuit is designed as per the application diagram in the datasheet.Pin23 (CE) is the chip enable pin and it has to be held low using …
Voice/Audio Recorder Playback Circuits - Homemade …
https://www.homemade-circuits.com/make-single-chip-programmable/
Audio Record/Playback Circuit using IC ISD1820 The second concept explains the functioning of the IC ISD1820 which is a single chip audio …
Simple Voice Recorder and Playback Circuit
https://makingcircuits.com/blog/simple-voice-recorder-playback-circuit/
This specific circuit has been made with Win bond’s ISD1616 IC (SMD) IC, that is certainly a purely integrated, single-chip, single message voice …
microcontroller - Audio Circuit Playback - Electrical ...
https://electronics.stackexchange.com/questions/535809/audio-circuit-playback
I have an audio circuit setup currently in which a microcontroller (PIC32MM) sends PWM signals to an amplifier which is attached to some speakers in order to hear what is going on. I have attached a
SD CARD SOUND RECORDING, PLAYBACK CIRCUIT PIC16F876A
https://pic-microcontroller.com/sd-card-sound-recording-playback-circuit-pic16f876a/amp/
Audio input is 1Vp-p , you can use the mic circuit or other source. The CCP in PWM mode gives 20KHz wave with duty cycle modulated to the audio amplitude. A low pass filter removes the 20KHz component. I added a simple 2 transistors amplifier to boost the power to drive 32 Ohm speaker or headphones. SD/SDHC CARD SOUND RECORDER FOR ARDUINO
Pico PWM MP3 | MP3 Playback on RP2040 with …
https://learn.adafruit.com/mp3-playback-rp2040
CircuitPython-Compatible MP3 Files CircuitPython supports any MP3 file, as long as it is the right bit rate and sample rate for your board. Mono and stereo files less than 64kbit/s work, with sample rates from 8kHz to 24kHz. The RP2040 has a PWM output with 10 bits, so there's not much point in using high bit rates.
audiocore – Support for audio samples — Adafruit ...
https://circuitpython.readthedocs.io/en/latest/shared-bindings/audiocore/index.html
sample_rate – The desired playback sample rate Simple 8ksps 440 Hz sin wave: import audiocore import audioio import board import array import time import math # Generate one period of sine wav. length = 8000 // 440 sine_wave = array . array ( "h" , [ 0 ] * length ) for i in range ( length ): sine_wave [ i ] = int ( math . sin ( math . pi * 2 * i / length ) * ( 2 ** 15 )) dac = audioio .
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