Automatic Feeder Prototype
This project features an Arduino Uno board along with various
electronic components to power the feeder system. It uses a
motion sensor to detect an animal's presence and activates a
motor that releases food.
By providing a reliable food source, the feeder aims to reduce
the risk of species decline and support the balance of
ecosystems.
Solar-Powered Charger
I designed and built a solar-powered USB charger capable of
charging small electronic devices such as cellphones, iPods, and
tablets. The system uses a solar panel to capture sunlight and
convert it into electrical energy, which is then stored in a
rechargeable lithium-polymer battery.
Because USB devices require a constant 5V output and the LiPo
battery provides only about 3.7V, the build integrates a DC-DC
voltage converter to step up the voltage.
Useless Box
This project involved designing and building a motorized
"useless box," a playful gadget that turns itself off whenever
switched on. When the user flips the external toggle switch to
the on position, a mechanical finger driven by a DC motor
emerges from the box, flips the switch back off, and then
retracts inside.
The system uses three AA batteries, a DPDT switch for directional
control, and an SPDT microswitch to detect when the finger is
fully retracted and stop the motor.