Published:2011/10/25 21:33:00 Author:Ecco | Keyword: computer motherboard
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Published:2011/10/25 21:36:00 Author:Ecco | Keyword: computer motherboard
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Published:2011/10/25 21:36:00 Author:Ecco | Keyword: computer motherboard
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Published:2011/10/25 21:35:00 Author:Ecco | Keyword: computer motherboard
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Published:2011/10/25 21:34:00 Author:Ecco | Keyword: computer motherboard
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Published:2011/9/26 21:50:00 Author:Rebekka | Keyword: Digital displaying , photoelectric counter
The circuit has optical input circuit (VD, 3DU12), pulse forming circuit (IC1A, IC1B form the voltage comparator; optical coupler; transistor switching circuit) and counting and display circuit. (View)
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Published:2011/9/16 0:50:00 Author:Rebekka | Keyword: Digital Potentiometers
X9511 is a of non-volatile Digital Potentiometer with digital integrated circuit manufacturing process. Its internal binary counter is composed of five binary counter, five-bit rewritten read-only memory (that E2PROM), storage and clear control circuit, thirty-two selected one decoder circuit, transmission gate and resistor arrays and other components. Pin and functionare shown as above. (View)
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Published:2011/9/26 2:22:00 Author:Rebekka | Keyword: Demodulation decoding , display circuit
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Published:2011/9/26 2:23:00 Author:Rebekka | Keyword: driver circuit, light-emitting diode
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Published:2011/9/26 21:55:00 Author:Rebekka | Keyword: Remote control load protection
Remote control block diagram of the load protection.
Remote control transmitter.
Remote control receiver and load protection circuits.
Load protection's main functions are: (1) When the power supply voltage is too low or too high, the load will be off automatically; (2) When the power supply voltage is restored, the load power will be connected automatically; (3)Ot provides powerfor normal indication, When the voltage is too low or too high, the light will turn off; (4) Using remote control to remote control power.
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Published:2011/9/26 2:17:00 Author:Rebekka | Keyword: Pyroelectric detect alarm system
The picture (A) shows the detection and transmission circuit;The picture (B) shows the receiver alarm circuit. (View)
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Published:2011/9/26 22:02:00 Author:Rebekka | Keyword: Pyroelectric infared detection , wireless alarm
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Published:2011/9/26 2:15:00 Author:Rebekka | Keyword: Pyroelectric detection , radio transmitter
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Published:2011/9/26 22:01:00 Author:Rebekka | Keyword: Human infrared, thermal release alarm
Human infrared thermal release alarm can receive the heat releasing infrared ray issued by the body during the day or night, then it willgive the sound and light alarm. It is ideal for electronic guard. Working principle: The circuit uses imported IC, general-purpose sensor control circuit, high input impedance operational amplifier, it consists of the timer, the timer latch, and the operating voltage is 3.5V ~ 5V, and quiescent currentis 60μA. It uses 3 ~ 4 1.5V batteries or 6V ~ 12V rectifier. Pyroelectric infrared sensor RIP09 TL receives body heat release signal. The signal will be amplified by the first stage op amp in IC. Then it will be amplified and coupled by the second level of C6 amplifier. Then it will be sent to built-in comparator to have bidirectional amplitude discrimination. R2, C2 are delay control. If you need longer hours of work, you can increase the R2's resistance or the capacitance value ofC2, the circuit is set to 3s ~ 4s.
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Published:2011/9/27 21:13:00 Author:Rebekka | Keyword: attachment method , user code
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Published:2011/9/27 1:59:00 Author:Rebekka | Keyword: infrared receiver preamplifier , integrated circuit
BL20106 is produced by Shanghai Belling Electronic Technology Co., Ltd. It is infrared remote control system for receiving bipolar preamplifier ASIC. Its features are: Low power consumption, low voltage, the internal band-pass filter everywhere; Output is an open collector output, and it can be connected with CMOS and TTL circuit; Input can be directly connected with the photodiode. Domestic and foreign similar products are D20106, CX20106, KA2184A and these can be directly interchangeable.
The figure below shows a typical application circuit constituted by the BL20106, andthe circuit is very simple, and its typical operating voltageis 4.7 ~ 5.3V, the circuit operating frequency is F0 = 40kHz
BL20106 shape pin map.
BL20106 internal block diagram.
BL20106 limit of the operating parameters: (TA = 25 ℃)
BL20106 working waveform is shown as below:
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Published:2011/9/27 1:56:00 Author:Rebekka | Keyword: Internal schematic diagram
BA1404 IC is a dedicated FM transmitter circuit.
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Published:2011/9/27 21:03:00 Author:Rebekka | Keyword: Electronic dog alarm
(1)Thepartschematic of infrared sensor electronic dog alarm probe.
Electronic dog alarm is composed of pyroelectric infrared sensor and alarm control speaker.
Alarm controlling speaker's principle diagram. (View)
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Published:2011/9/27 21:39:00 Author:Rebekka | Keyword: pinout function
Integrated digital coding circuit VD5026 and its supporting decoding circuit VD5027 are a pair of commonly used digital code, decoding circuit. The pinout function circuit diagram is shown as the chart. (View)
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Published:2011/9/27 21:36:00 Author:Rebekka | Keyword: infrared remote control , encoder and decoder, typical application
YN5101/5201 encoder / decoder extreme working parameters: Supply voltage is0 ~ 6v; input / output voltage: (Vss-0.2V) / (VDD +0.3 v); maximum power consumptionis 500mW; Operating Temperature is -20 ~ +70 ℃; Storage temperature is-55 ~ +125 ℃.
Typical application circuit YN5101 encoding device.
Typical application circuit decoding device YN5201.
Infrared receiver demodulation circuit can use a dedicated infrared modules or infrared preamplifier IC dedicated to form infrared demodulation circuit. The general infrared preamplifier IC models are: CX2106A, μPCI373HA, μPCI490 and KA2184, etc.
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