シナリオ
A maker wants to drive an LED matrix from an ATtiny85 with minimal GPIO pins.
この図に含まれるもの
図の背後にある意思決定を読み解く。
01
Use Charlieplexing to control 12 LEDs with only four pins
02
Add series resistors on each GPIO line for current limiting
Small LED matrix projects where GPIO pins are scarce and a compact display is needed.