Projects Archive • Wolles Elektronikkiste

WiFi BBQ thermometer

I will show you how to build a WiFi BBQ thermometer with a temperature sensor, an ESP32 board and a few other components.

Wireless BBQ thermometer (433 MHz)

I will show you how to build a wireless 433 MHz BBQ thermometer with alert function and graphical display of the temperature curve.

Remote shutter for smartphones – Part 2

In this second part about remote shutters, I’ll show you how to trigger your smartphone camera with BT modules like the HC-05 or HC-06.

Current Sensor – how to build it yourself

In this article I show how you can build a shunt-based current sensor like the INA219 or INA226 yourself. I present two solutions.

Using IFTTT and Webhooks with the ESP8266

You want to be informed about out-of-control sensor readings on your smartphone (free of charge)? No problem with IFTTT (if this then that). I’ll show you step by step how to do this and how you track things online.

LED dot matrix display control

I show you how to control an LED matrix display and how you can create a running font. I use the LedControl library, but I also show how to do it without.

HX711 based balance

With an HX711 module and a load cell, you can easily build an astonishingly precise balance. I also show you how to install an automatic shut-off system.

IR proximity sensor – how to build it yourself

In this article I show how to build an IR proximity sensor yourself. I present two approaches, one with pulsed signals and one without.

Pong for Arduino – computer table tennis

A simple version of Pong, realized with an Arduino for a 1.8 inch display. Hardware and Sketch are described in detail.

Radio rain warning system in a lunch box

A rain warning system that switches an alarm siren connected to a radio socket is presented in this post. Also: how to build the actual sensor yourself.

Wolles Elektronikkiste

Die wunderbare Welt der Elektronik

Category: Projects