逆計(jì)時(shí)數(shù)顯定時(shí)器的設(shè)計(jì)
1萬(wàn)字 28頁(yè)




[摘要] 本文介紹了一種電子定時(shí)器．定時(shí)時(shí)間用數(shù)字顯示．并進(jìn)行逆計(jì)數(shù)．當(dāng)計(jì)數(shù)器顯示為 “ 0 ” 時(shí)．控制器會(huì)自動(dòng)切斷或打開(kāi)用電器的電源， 定時(shí)時(shí)間范圍 1～ 990分鐘。該定時(shí)器可替代目前一些家用電器中的機(jī)械定時(shí)器。
倒計(jì)時(shí)時(shí)定時(shí)器的用途很廣泛，它可以用作定時(shí)器，控制被定時(shí)的電器，實(shí)現(xiàn)定時(shí)開(kāi)或者定時(shí)關(guān)，在定時(shí)的過(guò)程中，隨時(shí)顯示剩余時(shí)間， 它還可以用作倒計(jì)時(shí)計(jì)數(shù)器。由三位數(shù)碼管直觀顯示倒計(jì)時(shí)計(jì)數(shù)狀態(tài)。

關(guān)鍵詞：電子定時(shí)器,數(shù)字顯示,倒計(jì)時(shí)


[Abstract] This article introduced one kind of electronic timer. Fixed the time is demonstrated with the digit. And carried on ploting the number. When the counter is demonstrated “0”, The controller automatic turnoff or opens with power source of electric appliance,the range of fixed time is 1~ 990 minutes.This timer may substitute some mechanical timer of domestic electric appliances in the present.
The use of the count down timer is very widespread, it can be used as the timer,which controls the electric appliance what be fixed time, realizes fixed time opened or closed, in the process of fixed time, momentarily demonstrates the surplus time, it can be also used as the countdown counter. Display the condition of the countdown immediately by three nixietube.

Key word: electronic timer ,digit demonstration，countdown



參考文獻(xiàn)
[3] 庚華光 《電子技術(shù)基礎(chǔ)》 數(shù)字部分
[5] 梁德厚 《數(shù)字電子技術(shù)及應(yīng)用》 機(jī)械工業(yè)出版社