Capacitive touch screens work on the basic principle of activation of sensors when very diminutive electro-chemical charges dissipate on its surface. Thus, when we touch our fingers onto the sureface these charges are activated.
Snapshot of the 20 bucks stylus:(1)
1) A gel pen with the refill removed;
2) A board pin with a domed metallic surface;
3) Copper wire; and
4) Aluminium foil.
Time for the project-
Let's get started!
The improvised stylus(2):