prototyping with an esp32 and MAX98357A amp #ESP32 #Arduino #IoT #Maker #DIYElectronics #EmbeddedSystems #Hardware #AudioAmplifier #MAX98357A #Electronics #Tech #Coding #Microcontroller #Prototyping #desing #physicalcomputing
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#audioamplifier
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I had a cheap audio amplifier from AliExpress, a few speakers pulled out of an old TV, a chunk of USB cable, a cardboard box, and half an hour. Looks like I made something! Audio quality isn’t the best, but it will run on a 5V/1A USB power supply and I can plug a radio into it instead of using headphones.
Front view of a large TV speaker built into the front of a cardboard box and a smaller speaker built into the top. The speakers are held in place with zip ties. There is a black volume control knob to the right of the front speaker. A blue-cloth wire and a black wire exit the top right rear corner of the box.Rear view of the speaker in a box. There is a small audio amplifier PCB on the left side. The black wire, blue wire, and a yellow/brown wire from the speaker connect to this PCB. You can see the untrimmed zip ties.
Rock Out Without Getting Knocked Out https://hackaday.com/2024/06/27/rock-out-without-getting-knocked-out/ #headphoneamplifier #audioamplifier #MusicalHacks #musicalhacks #instruments #Practice #guitar #bass
Hackaday · Rock Out Without Getting Knocked OutIt’s a constant battle for musicians — how to practice your instrument without bothering those around you? Many of us live in apartments or shared accommodation, and having to wait unti…
Rock Out Without Getting Knocked Out - It’s a constant battle for musicians — how to practice your instrument without bot... - https://hackaday.com/2024/06/27/rock-out-without-getting-knocked-out/ #headphoneamplifier #audioamplifier #musicalhacks #instruments #practice #guitar #bass
Hackaday · Rock Out Without Getting Knocked OutIt’s a constant battle for musicians — how to practice your instrument without bothering those around you? Many of us live in apartments or shared accommodation, and having to wait unti…
Continued thread
Finally got my Kwelatones TL072 Audio Amp boxed and ready for some tunes! 
Continued thread
It works!
Audio test was successful, quiet audio in -> loud audio out. Whoop, whoop!
Left/right balance testing confirmed that I had not got that reversed. Only mistake seems to be with the volume pot, as I have to turn it anti-clockwise to increase the volume. I think I will have to fix that 
Other observations are a bit of hiss, and some mains hum from the laptop.
Next, a box to live in and then I can connect it to my RC2040
Continued thread
The kit soldering and build is complete... Next I need to test it with some audio and then house it in the small tin, or maybe something a little bigger
Initial testing so far has just been connecting the 2x 9v batteries and switching it on. The power led illuminated, as hoped for!
Continued thread
I have now soldered all the PCB components. Off board potentiometers, audio sockets and power connectors next.
New project alert!
Actually, this project is linked to my #RC2040. I have noticed that the RC2040 supports speech synthesis using allophones. So I need a small #AudioAmplifier - and I just happen to have a kit for one from #Kwelatones, based in South Africa (long story there 
).
It is a TL072 op-amp based amplifier.
I have only added the 9v batteries and the mint tin to house it in.
Anyways, my first step when starting a kit project is to check that I have all the parts, tick, tick, tick...
A Practical Discrete 386 - There are some chips that no matter how much the industry moves away from them sti... - https://hackaday.com/2022/11/27/a-practical-discrete-386/ #audioamplifier #parts #audio #lm386
HackadayA Practical Discrete 386There are some chips that no matter how much the industry moves away from them still remain, exerting a hold decades after the ranges they once sat alongside have left the building. Such a chip is …