Galvanic isolation: optocouplers

For sure, you have heard the term galvanic isolation many times. In brief, it’s about separating the source of signal from the microcontroler in order to prevent it from unwanted and dangerous voltage spikes, while allowing to read the signal. Such a separation is provided by optocouplers. The optocoupler contains in common package both infrared […]

Temperature and LCD

In Nettigo recently appeared LCD kit for Arduino – it is 2×16 alphanumeric LCD with soldered connector fitting to a breadboard and 10 kΩ linear potentiometer for contrast regulation. The LCD module has HD44780-compatible controler, what means LiquidCrystal library will be able to handle it. How to connect it? Let’s begin from the code: #include […]

Arduino’s eye, or about a photoresistor, not Tolkien’s mythology

Arduino’s eye – sounds like a quote from J.R.R. Tolkien, while it’s about connecting photoresistor to Arduino. With this article I would to begin short course dealing with basics of electronics. Photoresistor is a element whose resistance is dependent of amount of light falling on it. What only remains is to measure this resistance. In […]

LED diodes – how to flash and light

Recently there was silence on Starter Kit, because before holidays I was preparing to Bootstrap 9.4, what took most of my free time. Now, taking advantage of free day I’m making up for it. Previously, we were dealing with reading from external sensor (photoresistor). Now we will try to show this reading. We will use […]

How to measure temperature with Arduino and MCP9700

One of the sensors included in Arduino Starter Kit is a temperature sensor. It’s analog device which doesn’t need any additional elements to work (it’s exactly MCP9700-E/TO). So, briefly speaking, after connecting ground and power supply we are already able to measure temperature. On the sensor’s page in Nettigo shop there is PDF datasheet in […]