Neatly packaged in a silicone wristband, this is the smallest version of the ESP32 that I know of. The ESP itself does not have its own programmer. However, there is a kit that contains the wristband and a programmer. Once initialised, the wristband can be updated via OTA.
Continue reading "VORSCHAU – ESP 32 Armband – LilyGo-T-Wristband"With new developments, it's important to send some outputs via the serial port or another medium. Of course, these outputs can simply be deleted or documented. But at the latest when the implementation is extended, they will be needed again. There are different approaches, which I would like to briefly present here. Which variant is the right one...
Continue reading "Debug Ausgaben im Quellcode"
The initial idea was to read the MJPeg stream from the ESP32 camera and display it on the TTGO screen. As I was having problems implementing the MJpeg protocol, I opted for a simplified version and am now reading snapshots from the camera. This has the advantage that whenever the...
Continue reading "TTGO TS V1.2 Als Video Viewer für (M)Jpeg"
Developed at Motorola in 1987, it implements a „standardised“ serial bus for communication with peripheral devices such as displays, sensors, etc.
Continue reading "SPI – Serielle Peripherie Schnittstelle"
This laser distance sensor is faster than sonar sensors such as (for example, HC-SR04, US100). It measures in the range of 30mm up to 2 metres and is controlled via the I²C bus at address 0x29. The address can be changed via software.
Continue reading "GY-530 VL53L0X Laser-Entfernungsmesser"
This is where the foundation for operating stepper motors with microcontrollers will be laid. This article will: Describe the operating principle, name some properties and characteristic data, and provide a few tips. There are many sources online that already describe the fundamentals exhaustively. This is more of a compilation of useful information and aims to...
Continue reading "Grundlagen Schrittmotor"
Slip rings enable electrical connections to objects rotating through 360°.
Continue reading "Ringschleifer"
Here is an acoustic connection for microcontrollers. The KY-038 module houses a microphone and a threshold switch, which can be set via a variable resistor. Both signals, that of the threshold switch and the inverted microphone signal, are provided at pins A0 and D0. WARNING: I was unable to operate this module meaningfully!!! Fact Sheet Description Value Digital...
Continue reading "KY-038 Mikrofon Modul"
I purchased a robot chassis for €89 (this time directly from Amazon). This chassis has three omnidirectional wheels. In this report, I will show the assembly and mention a few facts. The use of the chassis will follow in later reports. (The manufacturer provides an assembly video, which I have linked below.) Facts Components Stable platform made of...
Continue reading "Dreieckiges Roboter Chassis mit omnidirektionalen Rädern"
The aim is to operate two DC motors using a Raspberry Pi 3 with the help of a motor driver board. This will later be used to power a two-wheeled robot. Hardware: Pi 3 (or older, please pay attention to the correct pins) Motor driver board L9110s 2x DC motor Various cables (pre-made pin-header cables) Test setup GPIOs on the Raspberry Pi Motor1 direction GPIO 26…
Continue reading "Raspberry PI 3 + Motorsteuerung"