Published:2011/4/1 1:48:00 Author:Nicole | Keyword: sequential timer
The 556 double timer transports the first half to the latter half by 0.001μF coupling capacitance, giving a total delay which is equal to the sum of single delay. The moment of 6-pin grounding can start the first half of timer. After determining the time interval by 1.1R1C1, the second timer starts delaying, the value is decided by 1.1R2C2.
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Published:2011/4/2 2:16:00 Author:Nicole | Keyword: Electronic clock
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Published:2011/4/2 2:19:00 Author:Nicole | Keyword: short-circuit protector, relay
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Published:2011/4/2 2:22:00 Author:Nicole | Keyword: motor speed control
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Published:2011/4/2 2:29:00 Author:Nicole | Keyword: electric fan, stepless speed regulation
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Published:2011/4/2 2:34:00 Author:Nicole | Keyword: electric heater, temperature control
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Published:2011/4/2 2:51:00 Author:Nicole | Keyword: control integrated circuit
The RT in figure can be chosen between 5kΩ~5MΩ. Considering operate easily and linearity, it is better to choose 250kΩ~1MΩ. The preferred value of CT is over 0.01pF, and the minimum value should not lower than 3 900pF according to the manufacturer's recommendations.
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Published:2011/4/2 2:55:00 Author:Nicole | Keyword: constant source, charging timer
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Published:2011/4/2 3:17:00 Author:Nicole | Keyword: timer
This timer circuit can provide 20min counting time delay. It is a normal decline oscillator with FET current source. Resistance R1 provides reverse migration to the door of JFET transform into power supply. It colses JFET and delays the charging time of C1. C1 is a low drain capacitance similar to polyester resin.
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Published:2011/4/2 3:42:00 Author:Nicole | Keyword: electronic governor
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Published:2011/4/2 3:45:00 Author:Nicole | Keyword: Ni-Cd battery, charge control, integrated circuit
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Published:2011/4/2 3:53:00 Author:Nicole | Keyword: long-time timing, integrated circuit
The timing time in figure is decided by timing R.C components R, C and 4, 5 pins preset level B, A. The value of timing time T=2/3•1024•N•R•C is determined by A, B, in theory.
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Published:2011/4/2 3:56:00 Author:Nicole | Keyword: speed regulation, integrated trigger
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Published:2011/4/2 3:57:00 Author:Nicole | Keyword: KV protection
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Published:2011/4/2 4:10:00 Author:Nicole | Keyword: on-off timing, special timing, integrated circuit
MC14541 is a programmable timing special IC. The timing time of this circuit is 3 hours, you can through selecting RTc、CTc、Rs to choose the time of required control power on-off.
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Published:2011/3/22 22:43:00 Author:Jessie | Keyword: pulse, width regulator
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Published:2011/3/22 22:44:00 Author:Jessie | Keyword: relay, delay, switch
Technical characteristicsWorking voltage: 10~16 VSwitch power: ~ 2kVARepeat preparation time: < 250ms
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Published:2011/3/21 0:57:00 Author:may | Keyword: Tianyi, amplifier remote control
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Published:2011/3/28 22:02:00 Author:may
μPC1373H application circuit is shown in the diagram:
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Published:2011/3/21 1:38:00 Author:Allen | Keyword: Fan speed control, remote control
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