Android app inventor based app connected to the arduino leonardo with bluetooth.
Arduino connected to pc with usb. No pc software needed.
Simple. cheaper way to make a motion detect camera from an old keychain 808 cam.
Login to your windows with RFID card / tag.
Don’t need additional windows app, only the arduino code.
Just plug in the arduino with the linked code, and readi to work.
Circuit, pcb design in the video.
Arduino code on the smd attiny45/85.
PCB size: 20x25mm / ~0.8×1 inch
Powered from 5V USB mini.
This small device check the water level every ~12 hour. If the water level low, the small water pump turn on until the water level reach the sensors.
The sensors not on power between the level checks, so no electrolyzis.
How to program attiny with arduino: