Solar power
Solar Power 3.7V Lithium Battery Charging Board
4 pieces: Portable Mini 6V 1W Solar Panel
Single chip DC – DC step-up step-down module for solar panel 3-35V to 2.2-30V
5V 250mA Mini monocrystalline solar panel
Portable Mini 6V 0.6W Solar Panel 80*55mm
Home energies measurement
Flowmeter Water Flow Sensors DN15 Turbine
INA219 I2C interface Bi-directional current/power monitoring sensor module
30A Current Sensor Module with ACS712ELCTR-30A Chip AC and DC+- 30A
SCT-013-030 Non-invasive AC Current Sensor Clamp
Project: Weather station (Meteo)
Mini Wind Turbine Blade, Vertical Axis
HMC5883 module – three-axis magnetic field sensor
DHT22 digital temperature and humidity sensor
BMP280 (Replace BMP180) 3.3V Digital Barometric Pressure Sensor
Snow/Raindrops Detection Sensor
ESP-12E based WeMos D1 – Arduino-like board with WiFi, Compatible with Arduino IDE
Wind Speed Sensor 4-20mA or 0-5v
Nixie? Nixie!
NCH6100HV High Voltage DC Power Supply Module For Nixie Tube
8-Bit Fluorescent VFD 8 Digit Display Module
Lasers
(Be careful, keep your eyes!)
3pin 650nm Red Laser Transmitter Dot Diode (Copper Head Module)
650nm 5mW Red Laser Point Module, Glass Lens Focusable
Blue violet laser 405nm, 100 mW
Focusable Violet 405nm 120mw Line Laser Module w/ Adapter 16X65mm + mount
Protective Goggles for Violet/Blue 200-450/800-2000nm Laser
10mw / 30mw / 50mw / 100mw / 150-200mw Focusable 532nm Green Dot / Line / Cross Laser Module