Frequently asked questions

Should I disconnect power from my Arduino when I make changes to my circuit?
When making changes to a circuit, whether you add or remove components, or just re-wiring things, it is best to remove power first.  There are a few goo...
Fri, 29 Dec, 2017 at 8:48 AM
When the button is pressed, is there a short circuit between the 5V pin and the digital input pin?
I refer you to the wiring schematic of a push button connected to the Arduino (you may ignore the external LED): Here's what happens when the butto...
Sat, 30 Dec, 2017 at 4:04 PM
In the DHT22, why we are using pull up resistor, instead of a pull down?
To understand the reason, please start by having a look at the datasheet for this sensor (attached with this article), and scroll down to section 7. Jus...
Thu, 22 Feb, 2018 at 12:46 PM
My Arduino clone does not work on Mac OS (the USB port does not appear).
Many cheaper Arduino clones, like this Arduino Nano from Banggood, use a CH340G USB controller in order to bring down the cost. The Mac Os does not come...
Fri, 9 Mar, 2018 at 7:37 AM