Published:2011/4/19 8:58:00 Author:May | Keyword: Ericsson 788, travel type charger
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Published:2011/4/19 8:56:00 Author:May | Keyword: charger
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Published:2011/4/19 8:54:00 Author:May | Keyword: 12V, Pb acid storage battery, charging
It can charge to two series 12V Pb acid storage battery by this circuit.
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Published:2011/4/19 8:51:00 Author:May | Keyword: 12V, seal, Pb acid, dual level, folating charger
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Published:2011/4/19 6:47:00 Author:Ecco | Keyword: self-excited , multivibrator
It needs a resistance and a capacitor connecting externally when forming a multivibrator by Schmidt trigger. The circuit is used to the low frequency vibration source which has lower demand for accuracy, and the vibration is controlled. The circuit in the figure is a self-excited much harmonic oscillator composed of four 2 input Schmidt trigger.
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Published:2011/4/19 6:39:00 Author:Ecco | Keyword: Electronic, checking tone ware
The chart shows the electronic checking tone ware composed of CC4040. The circuit could produce 440Hz international standard A sound, it can be used as checking tone ware for band.
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Published:2011/4/19 2:54:00 Author:Ecco | Keyword: Audio, signal , generator
The oscillator is the services signal source for communication user . Working principle is as shown. It consists of VTl, VT2, and other related components. VTl using transformer T to couple oscillation signal, VT2 is the common collector buffer amplifier circuit, the emitter output. T transformer with 1-4 winding and the capacitor C4 form a selecting frequency network. In order to prevent magnetic saturation of T, T is connected to the collector of VTl by the 1-2 tap, 5-6 of T is the feedback loop. Detection: The DC-bit of pin-to-ground (reference value) is as shown in the table.
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Published:2011/4/19 4:37:00 Author:Ecco | Keyword: 3-1 , count down circuit
In digital circuits, sometimes it needs pulse a divider circuit which could minus a few input pulse. The appropriate combination ofCD4013 and feedback door can achieve any pulse subtraction circuit. Figure 3-1 shows 3-1 count down circuit composed of CD4013.
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Published:2011/4/19 3:06:00 Author:May | Keyword: 24V/3A, transistor, voltage regulator
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Published:2011/4/19 2:12:00 Author:May | Keyword: Full bridge
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Published:2011/4/19 3:16:00 Author:May | Keyword: 24V DC, 220V AC, 100W, push pull, chopper
24V DC power supply (such as storage battery) can offer power to this circuit. Controlled by chopper, it can output 220V, 50Hz AC. The main technical data of this circuit:work voltage: 24V (the maximum is 30V)no-load current: 1.15Aoutput voltage: 220V, 50Hzoutput power: 100Wefficiency: 74%The data of transformer:n1=n2=9 turns, 0.42 copper enamelled wiren3=n4=81 turns, 1.2mm copper enamelled wiren5=875 turns, 0.42 copper enamelled wire (View)
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Published:2011/4/19 3:31:00 Author:May | Keyword: 120V/25mA, DC voltage converter
This circuit is formed according to the principle of positive breakover convertor. That is to output power to load when the transistor is breaking over. We add diode D1 in its loop for the purpose of overtop base-emitter voltage on transistor. Start-oscillation button connected betweent resistor R1 and R2 is assisted start device. Meanwhile it can prevent the add of base current when load current is increasing. So this circuit has the function of short circuit protection.The data of transformer:winding n1=40 turns, 0.32 copper enamelled wiren2=12 turns, 0.15 copper enamelled wiren3=420 turns, 0.1mm copper enamelled wire (View)
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Published:2011/4/19 3:35:00 Author:May | Keyword: No adjustment, full bridge, 1000W, electronic transformer
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Published:2011/4/19 2:52:00 Author:May | Keyword: Inverter
250W controlled silicon inverter
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Published:2011/4/19 2:53:00 Author:May | Keyword: Inverter
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Published:2011/4/19 2:54:00 Author:May | Keyword: Inverter
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Published:2011/4/19 2:54:00 Author:May | Keyword: Inverter
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Published:2011/4/19 2:55:00 Author:May | Keyword: Inverter
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Published:2011/4/19 2:56:00 Author:May | Keyword: Inverter
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Published:2011/4/19 2:57:00 Author:May | Keyword: Inverter
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