回覆 1# clcwong

唔怕麻煩嘅話, 可以買粒 74HC logic gate (e.g. 74HC04) 砌個簡單 circuit (e.g. output 接粒 3mm 細電流 Red LED + 220ohm 限流電阻; LED on/off 用作 output high/low indicator) 做下實驗.

TOP