Ask MAKE

Ask MAKE: Voltage divider

Ask MAKE: Voltage divider

Ask MAKE is a weekly column where we answer reader questions, like yours. Write them in to becky@makezine.com or drop us a line on Twitter. We can’t wait to tackle your conundrums! Louis writes: I’ve seen the term “voltage divider” used a lot lately. What exactly is a voltage divider, and what is it used […]

Ask MAKE: LED as light sensor

Ask MAKE: LED as light sensor

Ask MAKE is a weekly column where we answer reader questions, like yours. Write them in to becky@makezine.com or drop us a line on Twitter. We can’t wait to tackle your conundrums! This week’s question comes from Kevin: I heard that you can use an LED as a light sensor. How? LEDs are diodes tuned […]

Ask MAKE: EPS foam

Ask MAKE is a weekly column where we answer reader questions, like yours. Write them in to becky@makezine.com or drop us a line on Twitter. We can’t wait to tackle your conundrums! Dan writes in: How are big closed cell polystyrene bocks made? I’ve seen them 12″ square and about 8′ long. Expanded polystyrene foam […]

Ask MAKE: Pull-up resistor

Ask MAKE: Pull-up resistor

Ask MAKE is a weekly column where we answer reader questions, like yours. Write them in to becky@makezine.com or drop us a line on Twitter. We can’t wait to tackle your conundrums! So what’s a pull-up (or pull-down) resistor, anyway? Well, it’s used when you’re reading an input voltage from some kind of sensor as […]

Ask MAKE: Crawl space camera

Ask MAKE is a weekly column where we answer reader questions, like yours. Write them in to becky@makezine.com or drop us a line on Twitter. We can’t wait to tackle your conundrums! Henry writes in: There are several ducts and wall spaces I would like to be able to look in. They sell pipe inspection […]