The scenario
A pressure-sensitive LED doormat activates individual LEDs when stepped on; each cell contains a normally-open pressure switch, series resistor, and LED.
What is in this drawing
Read the decisions behind it.
01
Use SPST pressure switches in parallel branches to isolate each sensor zone
02
Add 330Ω current-limiting resistors to protect LEDs
03
Power from a 9V battery with common ground return
Suitable for interactive floor mats, step counters, or pressure-activated signage needing simple discrete zone detection.
More like this