Skip to Main Content
Make: More Electronics
book

Make: More Electronics

by Charles Platt
April 2014
Beginner to intermediate content levelBeginner to intermediate
392 pages
14h 57m
English
Make: Community
Content preview from Make: More Electronics

Chapter 9. Experiment 9: From Millivolts to Volts

In the previous experiment, you determined that your electret was working. Now we can begin to make it do something useful.

Putting a Cap on It

The first step is to install a coupling capacitor, as shown in Figure 9-1. If you remember the basics, you already know that it will block DC voltage while allowing a pulse to pass through. In fact, depending on the size of the capacitor, it will be transparent to many small voltage fluctuations—such as those in an AC audio signal.

This simple test with a multimeter demonstrates that the capacitor blocks DC voltage while passing an AC audio signal.
Figure 9-1. This simple test with a multimeter demonstrates that the capacitor blocks DC voltage while passing an AC audio signal. ...
Become 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,
and much more.
Start your free trial

You might also like

Make: Electronics

Make: Electronics

Charles Platt
Easy Electronics

Easy Electronics

Charles Platt

Publisher Resources

ISBN: 9781449344030Errata PagePurchase book