August 2023
Beginner
128 pages
5h 43m
English
Content preview from Make: Volume 86
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PROJECTS: Amateur Scientist
IR REMOTE CONTROL TESTER
Have you ever pressed a button on a TV
near-infrared remote controller and nothing
happened? Figure
E
is a simple op amp circuit
that will allow you to quickly determine if an IR
remote is working.
In operation, a small silicon solar cell or
photodiode is connected to the non-inverting
input of an op amp through C1, a capacitor that
blocks steady light while passing pulses of near
IR from a working remote controller. R1 is a 100K
resistor that amplifies the signal from the solar
cell 100,000 times. If your IR remote control is
working, the piezo element will emit an audible
tone that matches ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.