I made a small dc fan which can extract the fume relished by the solder.
It's a button which can send your live location in emergency
i build a variable bench power supply to powerup my prototypes
esp32 jammer
I made a little project which is help to prevent thief broke into houses like the door locks are ma de with metals and I create this project with transistor and touch module so basically when someone touch the metal lock he grounded the circuit and completed it and alarm turn on it also has a reset button to turn the alarm off it powered with a 3.7v 18650 lithium ion battery.