April 2014
Beginner to intermediate
392 pages
14h 57m
English
Content preview from Make: More ElectronicsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 12. Experiment 12: A Functional Amplifier
As you saw in Experiment 10, an LM741 is not appropriate to drive a loudspeaker, even through a 2N2222 transistor. Really the LM741 is intended to be a bare-bones preamplifier, which increases the voltage from a very small input signal but cannot deliver significant power. A preamplifier is often referred to as a “preamp.”
Fully-featured preamplifiers used to be available in the consumer-electronics world as standalone devices, to amplify inputs from a tape deck, a microphone, or a phonograph cartridge. They included some adjustments for volume, bass, and treble, and then passed the signal along to a power amplifier, which was designed to drive loudspeakers. Today a preamplifier and a power amplifier ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.