Best Velleman Metal Detectors

ELEGOO 37-in-1 Sensor Kit provides an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software, which is designed to evolve the user from beginner to professional level. ELEGOO sensor kit contains a selection of the most common and useful electronic components and sensors with a tutorial featuring 31 creative and interesting projects to learn basics of electronics and programming with the R3 board or Mega 2560 board (not included). ELEGOO Upgraded 37 sensor modules kit is the most useful and highest cost performance sensor kit in Amazon market. It is 100% suitable for beginners. And it is also 100% compatible with Raspberry PI and STM32. But if you want to use it with Raspberry PI and STM32, you may find the tutorial by yourself. The kit has only sensor modules, if you want to use it, you will need the wires and controller boards. Warning Tip: The input voltage of Lego Power Supply Module is 6.5v - 9v (DC) via 5.5mm x 2.1mm plug . Please DO NOT over charge it otherwise it will burn your board and chips. Component listing:1 x Joystick Module1 x Relay Module1 x Rotary Encoder Module1 x DS-3231 RTC Module1 x Ultrasonic Sensor Module1 x HC-SR501 PIR sensor Module1 x Flame Sensor Module1 x Linear Hall Module1 x Metal Touch Module1 x Digital Temperature Module1 x Big Sound Module1 x Small Sound Module1 x RGB LED Module1 x SMD RGB Module1 x Two-tone Color Module1 x 7 Color Flash Module1 x Laser Emit Module1 x Shake Module1 x IR Receiver Module1 x IR Emission Module1 x Tilt Switch Module1 x Button Module1 x Active Buzzer Module1 x Passive Buzzer Module1 x 18B20 temp Module1 x Photo-resistor Module1 x Temperature and Humidity Module1 x GY-521 Module1 x Photo-interrupter Module1 x Tap Module1 x Membrane Switch Module1 x Avoidance Module1 x Tracking Module1 x Magnetic Spring Module1 x Water Lever Sensor1 x Power Supply Module1 x LCD1602 Module (with pin header)