Isolation power cord monitoring circuit with ISO102

Published:2011/4/18 7:29:00 Author:Jessie | Keyword: Isolation, power cord monitoring

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Isolation motor power supply current monitoring circuit with ISO102

Published:2011/4/18 7:23:00 Author:Jessie | Keyword: Isolation, motor power supply, current monitoring

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Coal gas accident alarm circuit diagram

Published:2011/4/18 2:34:00 Author:Rebekka | Keyword: Coal gas accident alarm

The circuit is match with gas stove. When the flame appears, it provides a stable airflow for the main nozzle gas relay. Radiation caused by the intermittent flame flash will produce low frequency signal. The amplified signal will produce pule to charge the capacitor. IR5 will be turned on and drive the alarm by relay. There isn't flame flash or pulse, the condenser discharge and IR5 will be stopped.   (View)

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Modulated photoelectric isolation circuit

Published:2011/4/14 21:40:00 Author:Nicole | Keyword: photoelectric isolation

This circuit is used to modulate FPA103 photoelectric isolator which is produced by Xiantong Company, it is also used to regulate singal from detector, making photoelectric isolator insensitive to the light of fluorescent lamp, and it will not reduce its performance. The VCO of NE567 PLLIC is adjusted to about 1400Hz by R1, C1, 741 operation amplifier changes the PLL⑥ triangular wave into square wave with 50% duty ratio, then to drive photoelectric coupler LED through Q1.   (View)

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Polarity reversal drive circuit

Published:2011/4/6 21:30:00 Author:Nicole | Keyword: Polarity reversal drive

9614 polarity reversal driver is transported to HCPL-2602 Photo coupler receiver through shield wire, twisted-pair or coaxial cable. In receiver input terminal, to connect a Schottky diode, it can impove the data transmission speed greatly. When tPHL(transmission delay time of turning into low output level) and tPLH(transmission delay time of turning into high output level) is closed to equal, there is the maximum data transmission speed.   (View)

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Dimming light circuit with operational amplifier

Published:2011/4/18 9:36:00 Author:Nicole | Keyword: dimming light, operational amplifier

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Dimming light circuit with parameter solid state relay

Published:2011/4/18 9:35:00 Author:Nicole | Keyword: dimming light, solid state relay

The relation between input resistance of 3, 4 foot and 5, 6 foot pressure drop is as below:   (View)

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Touch delay light circuit adopted power switch integrated circuit

Published:2011/4/18 9:29:00 Author:Nicole | Keyword: delay light, power switch

The delay time is determined by the capacity of C2, the figure data is about 25s. If it is needed to delay time, you can increase its capacity. Besides, the touch time also has influence on the circuit delay time.   (View)

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SH-808 festival color lamp with multiple music synchronous phonation control circuit 2

Published:2011/4/18 9:24:00 Author:Nicole | Keyword: festival color lamp, music

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SH-808 festival color lamp with multiple music synchronous phonation control circuit 1

Published:2011/4/18 9:21:00 Author:Nicole | Keyword: festival color lamp, music

The cirucit is as shown. It consists of rhythm pulse generator, light control circuit, music amplifier circuit and AC depressurization rectifier circuit. The core composition of light control circuit is festival color lamp control special integrated circuit.   (View)

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SH-811 festival color lamp with piano music control circuit

Published:2011/4/18 9:14:00 Author:Nicole | Keyword: festival color lamp, piano music

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SH-816 multi-pattern festival color lamp with piano music control circuit

Published:2011/4/18 9:13:00 Author:Nicole | Keyword: festival color lamp, piano music

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SH-816 festival color lamp with piano music automatic transformation control circuit

Published:2011/4/18 9:11:00 Author:Nicole | Keyword: festival color lamp, piano music

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SC3071X touch stepping dimming light circuit

Published:2011/4/18 8:57:00 Author:Nicole | Keyword: dimming light

SC3071X is produced by Hangzhou Silan Microelectronics Co. Ltd. compared to SC3071, it has one more mode to select, so SC3071X also can choose on or off switch 2 steps control, besides controlling low brightness, middle brightness, most brightness, turn-off four steps.   (View)

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SC3071 touch stepping dimming light circuit

Published:2011/4/18 9:04:00 Author:Nicole | Keyword: dimming light

The figure is as shown, it is a touch stepping dimming table light adopts SC3071 IC, when you use it, just to touch M repeatedly, then the brightness of light will cyclic change with low brightness, middle brightness, most brightness, turn-off four steps, when it is most brightness, the conduction angle of SCR VTH is 115°.   (View)

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Typical application circuit of LTl56 monolithic four-way color lamp control integrated circuit

Published:2011/4/18 8:44:00 Author:Nicole | Keyword: color lamp

In figure, the work frequency of LT156 internal oscillator is determined by external connected RC component RP and C2. To increase the value of KP or C2, the oscillation frequency will slow down, on the contrary, it will speed up.   (View)

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LCl71 audio voltage control three-way color lamp with firecracker control circuit

Published:2011/4/18 8:09:00 Author:Nicole | Keyword: audio voltage control, color lamp, firecracker

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LCl81 audio voltage control three-way color lamp control circuit

Published:2011/4/18 8:07:00 Author:Nicole | Keyword: audio voltage control, color lamp

The circuit is as shown. It consists of audio pich-up and amplifier circuit, light control circuit and AC depressurization rectifier circuit. BM is CRZ2 electret condenser microphone, it can change picked up sound singal into electrical signal, it is amplified by VT1 amplifier then added to emitter follower VT2, and added to input UIN terminal 5-foot of LC181 rectifier amplifier, to voltage control and modulate the internal VCO.   (View)

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LC182 cala OK audio voltage control synchronous color lamp control circuit

Published:2011/4/18 7:50:00 Author:Nicole | Keyword: cala OK, audio voltage control, color lamp

The circuit is as shown. It is composed of acoustic pick-up and impedance transformer, direct coupled double tube amplifier, color lamp controllerand DC power voltage.   (View)

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Drive high power color lamp control circuit composed of LC182 audio modulation color lamp control chip

Published:2011/4/18 7:44:00 Author:Nicole | Keyword: color lamp, audio, control chip

This cirucit is used to control high power AC color lamp.   (View)

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