TOP 5 AMAZING $1 Aliexpress Modules

1. MQ9 MQ 9 MQ-9 Smoke Liquefied Flammable Methane Gas Sensor Module for Arduino Diy Starter Kit.
Direct link:https://s.click.aliexpress.com/e/_EGLvpwy

2.DIY Electronic Kit Metal Sensing Detector MINI Handheld DIY Soldering Project Practice Electronic Module Kit Solder Assembly.
Aliexpress link:https://s.click.aliexpress.com/e/_EuvsNnm

3.LCD Display DC-DC 5-23V input To 0-16.5V output voltage 3A Max Step Down Power Supply Buck Converter Adjustable LCD Step-down Voltage Regulator.
Aliexpress link; https://s.click.aliexpress.com/e/_oE7QuiN

4.2S 3A Li-ion Lithium Battery 7.4 8.4V 18650 Charger Protection Board BMS PCM for Li-ion Lipo Battery Cell Pack Smart Electronics.
Direct link to product:https://s.click.aliexpress.com/e/_EvJQsVA.

5.4 Channel Wireless Four Button RF Remote Control Transmitter Receiver Module.
Aliexpress link:https://s.click.aliexpress.com/e/_Ez9Qaao