Category: Sensors

KY-018 Photoresistor Sensor

2 Comments

The KY-018 board is equipped with a light-dependent resistor and a corresponding current-limiting resistor. Data: Voltage: 3V-5V (other voltages are conceivable) Output: analogue voltage value I suspect that a GL5528 has been installed here. Facts: Connection designation – Ground + V+ (3V-5V) S Signal KY-018 – Pin assignment View Application areas: Brightness measurement As a sensor for aligning solar cells Light barrier as...

Continue reading "Sensor KY-018 Photowiderstand" →

MQTT Protocol + Experimental Setup

Leave a comment

I came across the term MQTT online and really liked the approach behind it. So, I treated myself to a small experimental setup, which I've described below. First, a few details about MQTT. About MQTT General Information MQTT governs communication between data sources and data sinks using a broker. Data Source Sources for…

Continue reading "MQTT Protokoll + Versuchsaufbau" →

GY-302 with BH1750 Sensor

Leave a comment

The BH1750 is a light intensity measuring sensor. I am not using the sensor discretely, but on the GY-302 board. It is controlled via the I2C (Wire) bus. As the GY-302 board is operated at 5V, it is suitable for control via the Arduino Uno. Circuit Diagram The circuit is similar (see sketch) to that of other GY...

Continue reading "GY-302 mit Sensor BH1750" →

GY-68 with BMP85/BMP180 Sensor

Leave a comment

The Bosch BMP85 is a barometric sensor. It can measure air pressure and temperature to calculate the current altitude above sea level. The BMP85 is no longer manufactured and has been replaced by the BMP180. The BMP180 is smaller in form factor but otherwise almost identical to its predecessor. Differences can be found in the linked datasheets…

Continue reading "GY-68 mit Sensor BMP85/BMP180" →
Arduino mit Prortotyping Board und SR04 Verkabelung perspektivisch

Arduino – HC-SR04 Distance Sensor

1 Comment

Controlling the HC-SR04 ultrasonic distance sensor with the Arduino UNO. Basic circuit setup (I later changed the pins from 0/1 to 2/3 because the ISP is still connected to 0/1). Test program Here's a small test program. It filters out values that are too small and too large, and allows for averaging over a defined interval. SR04Test.ino Here could…

Continue reading "Arduino – HC-SR04 Entfernungsmesser" →
ESP8266 DH11 Testschaltung

DHT11 with ESP8266 / ESP32

3 Comments

Controlling a DHT11 Sensor via the ESP8266 / ESP32 Basics Link to Article Setup Programming Libraries The integration of the library can be found in the following article: Link to Article Adafruit DHT Library Adafruit Unified Sensor Library Test Program Related Articles Sources: DHT Sensor General Adafruit DHT Library Adafruit Unified Sensor Library

Continue reading "DHT11 mit ESP8266 / ESP32" →

Arduino – DHT11 humidity sensor

1 Comment

Controlling a DHT10 Sensor via the Arduino Uno. Basics Link to article Wiring Diagram View Wiring Programming Libraries The inclusion of the library can be seen in the following article: Link to article Test Program Output Related Articles Sources

Continue reading "Arduino – DHT11 Feuchtigkeitsmesser" →

Controlling the US-100 distance sensor with a Raspberry Pi 3

Leave a comment

Controlling an US-100 ultrasonic distance sensor with a Raspberry Pi 3 (or earlier). I have only found tutorials for the SR-04, but this is integrated analogously to the US-100. Hardware Pi 3 (or older, please pay attention to the correct pins) US-100 (ultrasonic sensor) Breadboard (for easier setup) Various cables (pre-made pin header cables) Setup The US-100 operates at 3.3V…

Continue reading "Mit dem Raspberry PI 3 den Entfernungsmesser US-100 ansteuern" →

US-100

Leave a comment

The US-100 is an ultrasonic distance sensor with a supply voltage of 3V – 5V. It can therefore be operated directly with modern microcontrollers with a 3.3V supply voltage. Views Facts Technical Data Pin Assignment Supply Voltage 3-5V Trigger Echo Ground Ground Special Features The US-100 can be operated in two modes. In serial mode, the jumper on the back is set. …

Continue reading "US-100" →