Preview – INA3221 Power Monitor
Three-channel shunt resistor measurements are possible with the INA3211. The values can be read out via the I²C bus.
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Preview – Digital Weighing Sensor
Depending on the version, the sensor can weigh 1-20 KG and transmit it to a microcontroller. The sensor itself consists of an aluminium body and a strain gauge. There are corresponding libraries for HX711 on Arduino and Github (see sources). What is a preview: As I'm increasingly losing track of the hardware ordered, I will...
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ESP32 Bluetooth Gamepad
Sometimes a remote control or a joystick is needed to test a project or just have fun. The following describes how to connect an ESP32 via Bluetooth.
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ESP01 – DHT11 Temperature and Humidity Sensor Boards
Small board with a slot for the ESP01(s) and a DTH11 sensor. Facts Description Value Baud rate 115200 (possibly also 9800, for me it was 11) ESP01 slot 1 DHT11 sensor Sensor pin 2 Supply voltage 3.7 – 12V Button Reset General data Application areas Views Programming Libraries Sensor There are diverse implementations here, it is also…
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Temperature and humidity sensor DHT22
The DHT can measure humidity with an accuracy of 2%RH and temperature with an accuracy of +/-0.5°C. The values are output on the OneWire bus.
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LM2596 Step Down Voltage Converter
Manchmal hat man bereits eine Gleichstromquelle aber nicht die richtige Spannung, dieser Spannungswandler löst das Problem. Ich habe 5 Stück für rund 10€ beim den Amzonen gekauft. Fakten Ansichten Fazit Die Ausgangsspannung muss über den kleinen Poti eingestellt werde, hierzu benötigt man ein Messgerät um die Ausgangspannung erfassen zu können. Ich habe den Wandler mit …
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Preview – Current Measurement with the ACS712
Der ACS712 ermöglicht es, angeschlossen an einen Microcontroller, den Strom zu messen. Den Chip gibt es mit einer kleinen Schaltung fertig auf Platine. Es gibt diese in verschiedenen Varianten abhänger von der maximal zu messenden Stromstärke (5,20,30 Ampere). Die gemessene Stromstärke wird in eine proportionale Spannung umgewandelt und an einem Pin ausgegeben. Dieser kann über …
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Preview – Omnidirectional I²C Microphone
INMP441, if you can believe the specifications, a highly accurate microphone for the I²C bus. For around 3€ on the usual platforms. What is a preview: Since I'm increasingly losing track of the ordered hardware, I'll write a short preview after ordering. Then, when I get to the hardware, I'll do the corresponding...
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D1 Mini Shield – PIR (Motion Sensor)
This add-on board has a small motion sensor on board. The sensor has a slight delay and is connected to the D3 pin of the D1 Mini on delivery. Facts Motion sensor Pin selection possible via jumper on the back Description Name D1 ESP32 S2 C3 Motion detected Data D3 (Default) 17 18 7 Built-in LED LED 2 2 2 7! …
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D1 Mini Shield – SG30 Air Quality Measurement
This sensor board features an SG30 sensor that detects organic compounds and H2 in the air and can calculate the CO2 value from them (not a true CO2 sensor). **Facts** * I2C Interface * TVOC Measurement: 0-60000 ppb * eCO2 Measurement: 400-60000 ppm * Sensor can be detached from the board and operated via a socket * Φ2mm mounting holes **Description** Name: D1 ESP32 S2 C3…
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