Published:2011/4/23 3:11:00 Author:May | Keyword: digital, 2 to 4 ine decodes, demultiplexers
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Published:2011/4/23 3:37:00 Author:May | Keyword: self-adapting, zero voltage, switching, electron ballast
The principle diagram of self-adapting zero voltage switching electron ballast
IR2520 is mainly used for driving fluorescent lamp with power under 40W. The rated power of the lamp is different. The parameters of components such as Q1, Q2, L2, C7, etc have several differences. For example, when rated power of lighting tube is in the range of 16-28W, Q1 and Q2 should choose MOSFET which is 500V, 2A, such as (IRFC420, etc), the induction value of L2 is about 1.8mH and 3.5mH, the capacity of C7 is normally about 3.3nF-5.6nF. The power of lamp is larger, the induction of L2 is smaller, the real value is determined by debugging in order to close or meet the rated current of the lamp. (View)
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Published:2011/4/15 5:18:00 Author:May | Keyword: Accompanying sound
TDA2616 pin function and reference voltage:
pin 1: 10V-signal input 1
pin 2: 5V-noise elimination ( low level noise elimination)
pin 3: 10V-1/2 reference voltage
pin 4: 10V-signal output 1
pin 5: 0V-ground
pin 6: 10V-sinal output 2
pin 7: 20V-power supply
pin 8: 10V-negative-going input end
pin 9: 10V-signal input 2 (View)
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Published:2011/3/30 22:14:00 Author:Ecco | Keyword: Single valve , direct radio
Input tuning loop: It is consisted of magnetic aerial T and 2 changeable capacitance, and its function is receiving electromagnetic wave and choosing broadcasting station. High frequency amplification and demodulation: The TA7642 is a miniature integrated circuit, the shape is similar to the triode which is shown as chart. There are 10 triodes, including third stage high amplifier, one stage demodulation and one stage. Low frequency amplification: The low frequency amplification is completed by two triode VT1, VT2 to hit the speaker of collecting electrode connecting, which converts the low frequency current as sound, the potential machine RP is used as controlling volume. (View)
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Published:2011/3/23 4:51:00 Author:may | Keyword: Capacitive sensor signal disposal device
Capacitive sensor signal disposal device CS2001 typical application circuit is shown in the following diagram:
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Published:2011/4/23 1:56:00 Author:May | Keyword: Ultrasonic, mosquito worm repellant
Ultrasonic mosquito worm repellant circuit
It is a very simple ultrasonic mosquito, worm, cockroach repellant circuit.
The circuit is relaxation oscillator consits of CMOS 4047 single shot trigger. It can make its center frequency at about 22kHz by adjusting 4k7. Then it can output by bridge type power tube composed of four transistors. And it can push 3.25 inch Piezo to generate ultrasonic signal.
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Published:2011/4/24 1:11:00 Author:May | Keyword: window mode, air conditioner
Baohua KC-14 window mode air conditioner circuit is show in the diagram:
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Published:2011/4/24 1:21:00 Author:May | Keyword: air conditioner, window type
Huali KC-14、KC-16、KC-18、KC-23 window type air conditioner circuit is shown in the following diagram:
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Published:2011/4/11 2:44:00 Author:may | Keyword: two diphase stepper motor, driver
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Published:2011/4/24 1:14:00 Author:May | Keyword: Huali, window type, air conditioner
Huali KCD-23 type window type air conditioner diagram is shown in the diagram:
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Published:2011/4/14 5:47:00 Author:may | Keyword: Electronic rabbit catcher
Electronic rabbit catcher schematic circuit diagram is shown in the following diagram:
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Published:2011/4/11 2:55:00 Author:may | Keyword: DC Motor armature core
Two usage: [armature core assembly drawing ( diagram) ]
As major component of main magnetic circuit
Embedded armature winding is usually stamped and laminated by 0.5 mm silicon steel pates.
diagram: DC Motor armature core circuit diagram (View)
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Published:2011/4/6 5:45:00 Author:may | Keyword: DC motor static part
The main pole is an electromagnet, with an iron core laminated and tighten by 1-1.5mm steel blunt pieces.
diagram: DC motor static part circuit diagram (View)
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Published:2011/4/2 4:26:00 Author:may | Keyword: Electrical pulse treatment
Electrical pulse treatment circuit is shown in the diagram:
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Published:2011/4/11 2:52:00 Author:may | Keyword: DC Motor brush device
Graph: Role: to introduce and educe DC voltage and DC current from the circuit
Graph: composed by brush bar, brush yoke and copper wire plait (View)
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Published:2011/4/6 5:46:00 Author:may | Keyword: DC generator
diagram: The priciple model circuit diagram of the DC generator (View)
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Published:2011/4/6 5:45:00 Author:may | Keyword: DC motor structure
DC motor structure circuit
diagram:DC motor rotor graph rotational part called (View)
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Published:2011/4/11 2:26:00 Author:may | Keyword: Ventilator automatically stop
Ventilator automatically stop circuit diagram is shown in the diagram:
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Published:2011/4/14 5:56:00 Author:may | Keyword: Motor armature winding
The main circuit of DC motor is composed of many coils linked according to certain rules, components and embedding and placing method. To achieve the electromechanical energy conversion, electromotive force are produced by current and induction.
diagram: DC motor armature winding circuit diagram (View)
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Published:2011/4/1 2:01:00 Author:may | Keyword: Speed adjustable cleaner circuit
This cleaner adopts thyristor to make up speed adjust circuit. It can control the speed of motor according to requirmentand and the portative force of schmoe pipeline. The diagram is speed adjust circuit, and it is comparative maturity, normally used in top quality high power cleaner.
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