Published:2011/12/7 2:04:00 Author:Ecco | Keyword: three-phase, motor protection circuit
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Published:2011/12/7 1:49:00 Author:Ecco | Keyword: single-phase , motor protection
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Published:2011/12/9 0:57:00 Author:Ecco | Keyword: speaker, protection circuit , power amp
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Published:2011/12/7 1:59:00 Author:Ecco | Keyword: surface grinding machine, control circuit
M7120A surface grinding machineconsists ofthe bed , table , electromagnetic chuck , grinding , slide , column , etc., andthe control circuit is shown as the chart.
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Published:2011/12/7 1:40:00 Author:Ecco | Keyword: Automatic linput control lspare motor
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Published:2011/12/7 1:37:00 Author:Ecco | Keyword: Multi-function fan , frogs calling , control circuit
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Published:2011/12/6 21:22:00 Author:Ecco | Keyword: multi-function fan , frogs calling , control circuit
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Published:2011/12/6 21:45:00 Author:Ecco | Keyword: Multi-function fan , animal sound , control circuit
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Published:2011/12/6 21:44:00 Author:Ecco | Keyword: Multi-function fan , nature sound , control circuit
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Published:2011/12/6 21:43:00 Author:Ecco | Keyword: Multi-function fan , seashore , control circuit
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Published:2011/12/6 21:42:00 Author:Ecco | Keyword: Multi-function fan , twitter , control circuit
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Published:2011/12/6 21:40:00 Author:Ecco | Keyword: Multi-function fan , control circuit
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Published:2011/12/6 1:47:00 Author:Ecco | Keyword: Automatic, intermittent lubrication , control circuit
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Published:2011/11/11 2:56:00 Author:Ecco | Keyword: Multi-tone alarm
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Published:2011/10/18 21:25:00 Author:Ecco | Keyword: Timing control
The timing control circuit is key to the design for responder, it should complete the following three functions: ① The host pulls the controlling switch to start position, then the speaker emits sound, the answer circuit and timing circuit will be in normal working condition. ② When the players press the answer key, speaker works, then the answer circuit and timing circuit stop working. ③ When the set answer time is up, no answer in time, the speaker also emits sound, then the answer circuit and timing circuit stop working.
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Published:2011/11/8 21:10:00 Author:Ecco | Keyword: Electric flute alarm, 555
Figure 5.21 shows the tone circuit circuit which can produce two voices with rising tone and dropping tone. Electric flute sound is generated by two generators coupled by optical coupler ( single-junction transistor 2N2648 and the timer 555). 555 generates 0.3HZ frequency signal which makes single-junction transistor VT2 keep this sound increasing or decreasing according to the section.
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Published:2011/11/8 21:11:00 Author:Ecco | Keyword: Motor immersion protection
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Published:2011/11/8 21:13:00 Author:Ecco | Keyword: schematic diagram
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Published:2011/11/8 20:33:00 Author:Ecco | Keyword: Automatic, telephone recording , controlling device
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Published:2011/11/8 20:32:00 Author:Ecco | Keyword: Motor overload protection
The circuit is the 5VDC motor protection circuit. The current extreme of DC current passing the motor is 5A, and the motor temperature is monitoring continuously, when it is more than 70 ℃, LTC1153 has fault signal sending to the computer, then the computer automatically shut off the machine.
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