Category Archives: Breadboard circuits

Simple indoor climate monitoring with an Arduino, BMP085, DHT11 and a RTC

In this a bit more extensive project we deal with several factors on the subject of indoor climate. We will measure the temperature, humidity and air pressure, saving maximum and minimum values of our measurements and show it on a TFT display.

Simple indoor climate monitoring with an Arduino, BMP085, RTC, DHT11

Simple indoor climate monitoring with an Arduino, BMP085, RTC, DHT11

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Sensors: Pressure and temperature measurement with the BMP085 (GY-65 breakout board)

On the way to a small weather station we deal today with the air pressure and temperature measurement and use a breakout board for the BMP085 with an I²C interface, and an Arduino of our choice.

Sensors: Pressure and temperature measurement with the BMP085 (GY-65 breakout board)

Sensors: Pressure and temperature measurement with the BMP085 (GY-65 breakout board)

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A 1.8 inch TFT color display (HY-1.8 SPI) and an Arduino

To give our Arduino the chance to tell sometimes what’s actually going on and do not always use the serial monitor, it is time to buy him a small display. Fortunately, there is a wide range of available shields and breakout boards. In this case, we use a 1.8 inch TFT color display with 128×160 pixels (HY-1.8 SPI, the name on the board), equipped with an SPI interface, which gives us the opportunity compared to displays with parallel interface, to have more free ports for other applications available.

A 1.8 inch TFT color display (HY-1.8 SPI) and an Arduino

A 1.8 inch TFT color display (HY-1.8 SPI) and an Arduino

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The HC-SR04 ultrasonic distance sensor and an Arduino

Learning from nature can also be used in electronics. Today we use the capabilities of the bat around with the HC-SR04 distance sensor to detect obstacles or measure the distance of an object using ultrasonic waves.

The HC-SR04 ultrasonic distance sensor and an Arduino

The HC-SR04 ultrasonic distance sensor and an Arduino

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Sensors: Temperature & humidity measurements with the DHT11

Sensors, like the DHT11, are virtually the senses in the world of microcontrollers. With them you can observe, for example, environmental influences, and possibly respond. In this case we deal with the temperature and humidity measurement and therefore we have almost a small weather station.

Temperature & humidity measurements with the DHT11

Temperature & humidity measurements with the DHT11

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Nokia 5110 LCD, an Arduino Pro Mini 3.3V with 8MHz clock frequency

As a quasi-nostalgic relic of an almost extinct generation of cell phones we use today, the Nokia 5110 LCD screen from the cellular phone with the same name, kindly as a breakout board for a small budget. Because the display operates at 3.3V, we use it together with a 8MHz clocked Arduino Pro Mini, which also runs at 3.3V.

Nokia 5110 LCD, an Arduino Pro Mini 3.3V with 8MHz clock frequency

Nokia 5110 LCD, an Arduino Pro Mini 3.3V with 8MHz clock frequency

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