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Index 307

JHo-751 Semi-automatic cargo elevator lighting circuit (2)

Published:2011/3/28 1:26:00 Author:Jessie | Keyword: Semi-automatic, cargo elevator, lighting

JHo-751 Semi-automatic cargo elevator lighting circuit (2)
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ISO113 offset voltage-regulating circuit

Published:2011/3/28 22:05:00 Author:may | Keyword: offset voltage-regulating

The diagram is ISO113 offset voltage-regulating circuit. This circuit can adjust offset voltage, adjust output and add to signal input common end Com1, offer ±150mV adjust range. (View)

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Electric fan reactor speed circuit

Published:2011/3/28 21:58:00 Author:may | Keyword: Electric fan reactor speed

Electric fan reactor speed circuit is shown in the diagram: (View)

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Pyroelectric infrared detector and its application circuit diagram

Published:2011/3/31 3:19:00 Author:Jessie | Keyword: Pyroelectric infrared detector, application

Pyroelectric infrared detector and its application circuit diagram
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Pyroelectric infrared language alarm circuit

Published:2011/3/31 3:50:00 Author:Jessie | Keyword: Pyroelectric infrared language alarm

Pyroelectric infrared language alarm isuse pyroelectricity infrared sensor as the probe todetect human body's special wavelength infrared signal. Non-contact detection distance, that is the body close to the protected areas' vision, alarm devicewill send outwarninglanguage. Sensor'sspectral rangeis 1 ~ 10μm, center is 6 μm, all All are in infrared bands, is decided by the optical properties of silicon window which packed in TO－5 metal shell. (View)

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Pyroelectric infrared language alarm device selection circuit

Published:2011/3/30 3:09:00 Author:Jessie | Keyword: infrared language, alarm device

Pyroelectric infrared language alarm device selection circuit
Pyroelectric infrared sensor modelcan choose P2288 or LS064, need to match 120 ° 12m wide-angle Fresnel filter glass. IC1 choose SNS9201 integrated circuit or SS0001 application-specific integrated circuit. IC2is language integrated circuits BA08, it storesstatement of Dangerous, there is electricity, keep away , IC2is soft encapsulation. IC3 is a integrate circuit with four languages analog sound, working voltageis 2 4 ~ 5 5V, soft encapsulation. (View)

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Voice-control switch and amplifier circuit

Published:2011/3/23 3:02:00 Author:Joan | Keyword: Voice-control switch , amplifier , Voice-control

Below is Voice-control switch and amplifier circuit. (View)

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Acoustic control four tones doll principle circuit diagram

Published:2011/3/28 1:30:00 Author:Joan | Keyword: Acoustic control , four tones , doll

Acoustic control four tones doll principle circuit diagram
This circuit uses the FL-11 blocks. It has few external components and its device is simple. Connect a ready acoustic control PCB to 2 1/4 inch speakers. Load into a box, and then external connect toFour AA batteries storm cells and support. Switch on, put into the doll body. When clapping, the doll cries of father, mother. It sounds like real one. the circuit generally can be succeed by different debug. (View)

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Voice-control doll PCB circuit

Published:2011/3/23 3:00:00 Author:Joan | Keyword: Voice-control doll , PCB , Voice-control

Below is Voice-control doll PCB circuit. (View)

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Multi-functional fountain bonsai operation principle circuit

Published:2011/3/27 23:03:00 Author:Joan | Keyword: Multi-functional fountain bonsai , operation principle

Multi-functional fountain bonsai operation principle circuit
It is a high-power and high-frequency oscillator using capacitive three-point oscillating circuit. The circuit oscillation frequency is piezoelectric transducer TD’s natural frequency 1.3MHz. L1 and C1 form a resonant circuit which does not determine the oscillation frequency here, but decided the oscillation amplitude. Its resonant frequency is 0.6MHz lower than the circuit's oscillation frequency. L2 and C2 oscillation frequency is greater than the circuit resonant frequency. The reason for using two resonant circuits, is to make the oscillation frequency of the circuit is more pure. To make the work of the oscillator is stable in the high-power, it uses two transistors to parallel work. R1, R2 are bias resistors. R1 is adjusted to make the oscillator output moderate. R3, R4 are used to balance the two transistors. (View)

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Simple infrared alarm device circuit

Published:2011/3/30 2:25:00 Author:Jessie | Keyword: infrared, alarm device

Simple infrared alarm device circuit
Infrared alarm device emits an infrared,can not be seen only by the naked eye, when anyone or object blocking any bunch of infrared light, alarm devicewill immediately makewarning signals.Using infraredto makealarm device, has advantages of concealed, high reliability, long life, strong anti-jamming capability, etc. (View)

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The human body induction alarm cat diagram

Published:2011/3/31 3:18:00 Author:Jessie | Keyword: human body induction alarm cat

The human body induction alarm cat diagram
When debugging, first adjust oscillating circuit part,don't access mosfet to circuit temporarily. As long as oscillation part welding and correct, itwill send out Mimi quack, meanwhile leds can glow normal, changing the feedback capacitor C can change oscillation frequency, small capacity, high frequency, whereas low frequency. Then access mosfetto circuit, switch on the power, HTD calls appear, it's dueto human body's induction. (View)

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Stationary three end stabilizer output voltage adjustable circuit

Published:2011/3/30 2:18:00 Author:Jessie | Keyword: three end stabilizer, output voltage adjustable

Stationary three end stabilizer output voltage adjustable circuit
R1 is220Ω, R2 is 680Ω, they aremainly used to adjust output voltage. Output voltage Uo≈Uxx(1+R2/R1), this circuit can realizeoutput voltage continuous adjustable in voltage range of 5～12V. Experiments prove: (1) R1is afixed resistance, change its value can obtained continuous adjustable output voltage, output voltage is equal to Uxx(1 + R2 / R1); (2) The supreme output voltage is limited by stabilizer's maximum input voltage and minimum input/output voltage, so this circuit's maximum outputis 12V; (3) Withinrange of the voltage regulator, the regulator precision can reach ±0.03. (View)