November 2024
Beginner to intermediate
128 pages
6h 44m
English
Content preview from Make: Volume 91
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header pins JD-VCC and VCC needs to be in place
as shown in the lower right. The 4-pin header in
the upper right connects to the PCB for power
and signals. A relay is activated when an input
receives a low (ground) signal, and an LED on the
module lights up.
When connecting the “hot” (black) side of
the 120V AC to the duplex plug from the relays,
remember to snap off the small connector
between the screws on that side so that each plug
will be controlled separately.
6. CONNECT THE JUMPERS
Connect the three 4-pin jumpers between the
4-pin headers on the PCB and the LCD, the
DS3231 RTC board, and the dual relay board.
7. MOUNT THE RTC BOARD
Mount ...
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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.