The 1 Key 1×1 Matrix Membrane Switch Keypad – Yellow is a compact, flexible, and self-adhesive momentary push-button switch suitable for Arduino, Raspberry Pi, ESP32, embedded systems, and DIY electronics. Its normally open 2-pin interface makes it ideal for reset, start, stop, trigger, and menu-selection applications.

The 3-6V 400KV High Voltage Generator Boost Module converts a low 3V to 6V DC input into a high-voltage pulse output using an internal boost circuit. Its compact size and simple two-wire input make it suitable for high-voltage experiments, scientific demonstrations, ignition systems, and educational electronics projects. The module requires only a suitable DC power supply and switch for operation.

Warning: This module generates extremely high voltage and should only be handled by experienced users following appropriate electrical safety precautions.

The MAX7219 8×8 LED Dot Matrix Module is an SPI-controlled LED display module featuring an 8×8 common cathode LED matrix driven by the MAX7219 display driver IC. It requires only three microcontroller pins for communication and supports cascading multiple modules to create larger scrolling text and animation displays. Ideal for Arduino, ESP32, STM32, Raspberry Pi, clocks, counters, message displays, and DIY electronics projects.

16-channel bidirectional analog and digital multiplexer module for connecting multiple sensors or signals using only four select pins and one signal pin.