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- david_kmng
- 白矮星
- 文章: 960
- 註冊時間: 週五 11 7月, 2003 00:10
- 來自: 草根階層
How about DIY kit 141. Visit this site:
www.kitsrus.com
You may buy the corresponding stuff in Ap Liu Street 鴨寮街 華輝, and some other shops on the same street (2 probably)
I have a book called 數位電路實驗與應用電路設計. I think it is a good book. You may find the book in public library.
Regards,
David
www.kitsrus.com
You may buy the corresponding stuff in Ap Liu Street 鴨寮街 華輝, and some other shops on the same street (2 probably)
I have a book called 數位電路實驗與應用電路設計. I think it is a good book. You may find the book in public library.
Regards,
David
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- 星際雲
- 文章: 13
- 註冊時間: 週日 29 6月, 2003 17:33
Hope this reply is not too late.
1: Buy a clock then DIY an interface on the buzzer, use NE555 ic for a half hour timer circuit. Once the alarm buzzer trigger the NE555 timer circuit, a relay will be energized for half hour.
2: Use 89C2051 ic to DIY a simply simple real time clock circuity. But you have to know how to program this chip.
8051 assemble language.
1: Buy a clock then DIY an interface on the buzzer, use NE555 ic for a half hour timer circuit. Once the alarm buzzer trigger the NE555 timer circuit, a relay will be energized for half hour.
2: Use 89C2051 ic to DIY a simply simple real time clock circuity. But you have to know how to program this chip.
8051 assemble language.
- david_kmng
- 白矮星
- 文章: 960
- 註冊時間: 週五 11 7月, 2003 00:10
- 來自: 草根階層
-
- 星際雲
- 文章: 13
- 註冊時間: 週日 29 6月, 2003 17:33
- david_kmng
- 白矮星
- 文章: 960
- 註冊時間: 週五 11 7月, 2003 00:10
- 來自: 草根階層
-
- 星際雲
- 文章: 13
- 註冊時間: 週日 29 6月, 2003 17:33
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