PAM8403 Stereo Amplifier - Revision history

Mayersven at 08:31, 14 June 2024

2024-06-14T08:31:33Z

← Older revision		Revision as of 10:31, 14 June 2024
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	<youtube>HPQMvL1SP_c</youtube>		<youtube>HPQMvL1SP_c</youtube>

	[[Category:~~Actuator~~]]		[[Category:Actuators]]

Mayersven at 12:57, 12 June 2024

2024-06-12T12:57:09Z

← Older revision		Revision as of 14:57, 12 June 2024
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	= Related Tutorial Videos =		= Related Tutorial Videos =
	<youtube>HPQMvL1SP_c</youtube>		<youtube>HPQMvL1SP_c</youtube>

			[[Category:Actuator]]

Skwhadmin: /* Description */

2020-08-29T13:39:28Z

Description

← Older revision		Revision as of 15:39, 29 August 2020
Line 4:		Line 4:
	The amplifier is connected (similar to a [[speaker]]) to the ESP32/ESP8266, it is also connected to power, and then it has connections for the speakers.		The amplifier is connected (similar to a [[speaker]]) to the ESP32/ESP8266, it is also connected to power, and then it has connections for the speakers.

	[[File:Amplifier.PNG\|~~x200px~~]]		[[File:Amplifier.PNG\|x300px]]
	[[File:Amplifier2.PNG\|~~x200px~~]]		[[File:Amplifier2.PNG\|x300px]]
	[[File:Amplifer03.PNG\|~~x200px~~]]		[[File:Amplifer03.PNG\|x300px]]

	= How to connect it electrically =		= How to connect it electrically =

Skwhadmin: /* Code to play a melody - decoding notes */

2020-08-29T13:33:31Z

Code to play a melody - decoding notes

← Older revision		Revision as of 15:33, 29 August 2020
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	[[File:Amplifier.PNG\|~~x200px]]~~		[[File:Amplifier.PNG\|x300px]]
	~~[[File:Amplifier2.PNG\|x200px~~]]		[[File:Amplifer03.PNG\|x300px]]
	[[File:Amplifer03.PNG\|~~x200px~~]]

	= Related Tutorial Videos =		= Related Tutorial Videos =
	<youtube>HPQMvL1SP_c</youtube>		<youtube>HPQMvL1SP_c</youtube>

Skwhadmin: /* Code to play a melody - decoding notes */

2020-08-29T13:33:09Z

Code to play a melody - decoding notes

← Older revision		Revision as of 15:33, 29 August 2020
Line 69:		Line 69:
	</syntaxhighlight>		</syntaxhighlight>

	[[~~file~~:~~Piezo_Speaker~~.~~jpg~~\|~~300px~~]]
	[[~~file~~:~~Piezo_Speaker_close_up~~.~~jpg~~\|~~300px~~]]		[[File:Amplifier.PNG\|x200px]]
			[[File:Amplifier2.PNG\|x200px]]
			[[File:Amplifer03.PNG\|x200px]]

	= Related Tutorial Videos =		= Related Tutorial Videos =
	<youtube>HPQMvL1SP_c</youtube>		<youtube>HPQMvL1SP_c</youtube>

Skwhadmin: /* How to connect it electrically */

2020-08-29T13:32:18Z

How to connect it electrically

← Older revision		Revision as of 15:32, 29 August 2020
Line 9:		Line 9:

	= How to connect it electrically =		= How to connect it electrically =
	[[File:Mono.PNG\|~~x200px~~]]		[[File:Mono.PNG\|x400px]]
			[[File:Stereo.PNG\|x400px]]
	[[File:Stereo.PNG\|~~x200px~~]]

	= How to control it in MicroPython =		= How to control it in MicroPython =

Skwhadmin: /* How to connect it electrically */

2020-08-29T13:32:04Z

How to connect it electrically

← Older revision		Revision as of 15:32, 29 August 2020
Line 9:		Line 9:

	= How to connect it electrically =		= How to connect it electrically =
	[[File:~~Piezzo~~.PNG\|~~300px~~]]		[[File:Mono.PNG\|x200px]]

			[[File:Stereo.PNG\|x200px]]

	= How to control it in MicroPython =		= How to control it in MicroPython =

Skwhadmin: /* Basic code to generate a 500 Hz signal */

2020-08-29T13:28:42Z

Basic code to generate a 500 Hz signal

← Older revision		Revision as of 15:28, 29 August 2020
Line 14:		Line 14:

	== Basic code to generate a 500 Hz signal ==		== Basic code to generate a 500 Hz signal ==
			creating a mono singnal with 500Hz on Pin 27 (connected to the left channel)
	<syntaxhighlight lang="python" line='line'>		<syntaxhighlight lang="python" line='line'>
	from machine import Pin		from machine import Pin
	from time import sleep, sleep_us, sleep_ms		from time import sleep, sleep_us, sleep_ms

	# assume our ~~LED~~ is connected to Pin 26, we use it as output		# assume our amplifier is connected to Pin 27, we use it as output
	myLED = Pin(27, Pin.OUT)		myLED = Pin(27, Pin.OUT)

Skwhadmin: /* Description */

2020-08-29T13:14:50Z

Description

← Older revision		Revision as of 15:14, 29 August 2020
Line 4:		Line 4:
	The amplifier is connected (similar to a [[speaker]]) to the ESP32/ESP8266, it is also connected to power, and then it has connections for the speakers.		The amplifier is connected (similar to a [[speaker]]) to the ESP32/ESP8266, it is also connected to power, and then it has connections for the speakers.

	[[~~File:~~File:Amplifier.PNG\|x200px]]		[[File:Amplifier.PNG\|x200px]]
	[[File:Amplifier2.PNG\|x200px]]		[[File:Amplifier2.PNG\|x200px]]
	[[~~File:~~File:Amplifer03.PNG\|x200px]]		[[File:Amplifer03.PNG\|x200px]]

	= How to connect it electrically =		= How to connect it electrically =

Skwhadmin: Created page with "= Description = An amplifier can be used to driver bigger speakers and to generate sound that is louder. The amplifier is connected (similar to a speaker) to the ESP32/E..."

2020-08-29T13:14:25Z

Created page with "= Description = An amplifier can be used to driver bigger speakers and to generate sound that is louder. The amplifier is connected (similar to a speaker) to the ESP32/E..."

New page

= Description =
An amplifier can be used to driver bigger speakers and to generate sound that is louder.

The amplifier is connected (similar to a [[speaker]]) to the ESP32/ESP8266, it is also connected to power, and then it has connections for the speakers.

[[File:File:Amplifier.PNG|x200px]]
[[File:Amplifier2.PNG|x200px]]
[[File:File:Amplifer03.PNG|x200px]]

= How to connect it electrically =
[[File:Piezzo.PNG|300px]]

= How to control it in MicroPython =

== Basic code to generate a 500 Hz signal ==
<syntaxhighlight lang="python" line='line'>
from machine import Pin
from time import sleep, sleep_us, sleep_ms

# assume our LED is connected to Pin 26, we use it as output
myLED = Pin(27, Pin.OUT)

#generate a 500Hz on/off signal
while True:
# this switcheson for 1ms = 1000 us
myLED.on()
sleep_us(1000)
# this switches off for 1 ms = 1000 us
myLED.off()
sleep_us(1000)
</syntaxhighlight>

== Code to play a melody - decoding notes ==
Example code shows how you can play a melody with the speaker. If you want to add higher notes see https://en.wikipedia.org/wiki/Piano_key_frequencies for the needed frequency. The example code was taken and edited from https://micropython-on-esp8266-workshop.readthedocs.io/en/latest/basics.html#beepers.

There are some issues with restarting PWM outputs - see [[Known Issues]].

<syntaxhighlight lang="python" line='line'>
# beeper code from https://micropython-on-esp8266-workshop.readthedocs.io/en/latest/basics.html#beepers
from machine import Pin, PWM
from time import sleep

tempo = 4
#notes and corresponding frequency
tones = {
'c': 262,
'd': 294,
'e': 330,
'f': 349,
'g': 392,
'a': 440,
'b': 494,
'C': 523,
' ': 0,
}
pin = Pin(27, Pin.OUT)
# Init Beeper without frequency.
beeper = PWM(pin, duty=512)
melody = 'cdefggaaaagaaaagffffeeddddc'
rhythm = [8, 8, 8, 8, 4, 4, 8, 8, 8, 8, 4, 8, 8, 8, 8, 4, 8, 8, 8, 8, 4, 4, 8, 8, 8, 8, 4]

for tone, length in zip(melody, rhythm):
beeper.freq(tones[tone])
sleep(tempo/length)

beeper.deinit()
</syntaxhighlight>

[[file:Piezo_Speaker.jpg|300px]]
[[file:Piezo_Speaker_close_up.jpg|300px]]

= Related Tutorial Videos =
<youtube>HPQMvL1SP_c</youtube>