This is an old circuit built with analog components.

powered by circuitpython

I am going to present the simple yet entertaining breakout game created with Arduino UNO, an OLED display, and a joystick.

A relatively simple and inexpensive way to make this device that is often used in alternative medicine.

Automatische Bewässerungssteuerung für bis zu 4 Pflanzen mit ESP8266 und Home Assistant Integration. ✅ 4x Kapazitive Bodenfeuchte-Sensoren (korrosionsbeständig) ✅ 4x Pumpen mit individueller Steuerung ✅ Wassertank-Füllstandsüberwachung mit Schwimmer ✅ 2x Hardware-Buttons für Standalone-Betrieb Betriebsmodi: • AUTO: Kontinuierliche Überwachung, automatisches Bewässern bei Bedarf • MANUELL: Pumpensteuerung über Schalter • NOTAUS: Automatisch bei leerem Tank Sicherheit: • Interlock - nur 1 Pumpe gleichzeitig aktiv • Timeout-Schutz gegen Überflutung • Keine Pumpenaktivierung ohne Wasser Alle Parameter über Home Assistant einstellbar (Schwellenwerte, Bewässerungsdauer, Intervalle). Komplette Logik läuft auf dem ESP - keine HA-Automationen erforderlich. Hardware: ESP-01, MCP23017, ADS1115, MOSFETs PCB: 2-Layer, 97x76mm, komplett Open Source

These candles flicker like a real candles and can be activated with an actual flame

Simplest type of SDR radio, wich is a combination of very simple Tube RF Front end, Soundcard as A/D converter, and PC software.

Project #15: Environment – EEPROM – Mk25

A fairly well-known and interesting montage

This project is a DIY split-rail (±) linear power supply with CRC filter designed for the Musical Fidelity A1 amplifier – a true Class A design with high quiescent current demand. Could be used for any audio power amp with high current demand with split-rail (±).

This project is a working model inspired by ISRO's Chandrayaan-3 lunar rover mission. The purpose of the project is to help students understand the basics of robotics, obstacle detection, and wireless control using Arduino and ESP8266. The rover model replicates the concept of terrain navigation and autonomous obstacle avoidance.

Tesla Coil design made with only one Vacuum Tube and a few passive elements powered by MOT Transformer.

Project #11: ESP32 - Bluetooth IoT - Mk12

This project demonstrates the design and implementation of a Multi-Voltage Regulator PCB that provides 4 output voltages: 12V, 9V, 5V, and 3.3V. The circuit uses four voltage regulators:

The Pi Digital Clock 7.84" Display is a digital clock that uses a 7.84-inch display to show the time in a clear and easy-to-read digital format. By connecting to a Raspberry Pi, it can be easily used