Uploaded November 2024 | Updated September 2026, 2 weeks ago

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Check out the nRF54L15 here: nordicsemi.com/nRF54L15-DK
To learn how to use it with the nRF Connect SDK, visit: academy.nordicsemi.com

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Previous Class A Audio Amp video: youtu.be/7Pv-j_R3YP4
BJT as a Switch Basics video: youtu.be/WRm2oUw4owE
MOSFET as a Switch Basics video: youtu.be/o4_NeqlJgOs

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In this video we will be having a look at my previous simplest audio amp that was made for wired headphones. It is a Class A amp that now needs a boost in power to drive a loudspeaker. I will show you how to do that and also try to use a MOSFET as a "better" audio amp. Will it be better though? Let's find out ;-)

Websites that were used in the video:
st.com/resource/en/datasheet/tip142.pdf
infineon.com/dgdl/Infineon-IRFZ44N-DataSheet-v01_01-EN.pdf?fileId=5546d462533600a40153563b3a9f220d
images.google.com

Thanks to Nordic Semiconductor for sponsoring this video.

0:00 The Problem of my old Audio Amp
1:29 Intro
2:33 Old BJT Amplifier
3:34 Darlington Transistor Solution?
4:57 New Complementary Components
7:33 Darlington Amp Final Test
7:48 MOSFET Amp?
10:18 MOSFET Amp Final Test
10:56 Darlington VS MOSFET Amp
12:58 Verdict