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colpitts oscillating circuit

Published:2011/4/13 3:27:00 Author:Jessie | Keyword: colpitts oscillating

colpitts oscillating circuit
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Cadillac electric door lock circuit

Published:2011/4/13 3:29:00 Author:Jessie | Keyword: electric door lock

Cadillac electric door lock circuit
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Bridge type picked up horn protection circuit (2)

Published:2011/3/23 3:56:00 Author:Jessie | Keyword: horn protection

Bridge type picked up horn protection circuit (2)
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Light modulator receive circuit diagram

Published:2011/3/24 2:46:00 Author:Ecco | Keyword: Light modulator receive

Light modulator receive circuit diagram
Q1, Q2 constitute of two class transistor amplifiers and used as zooming the modulating output semaphore of silicon solar battery. To 5lm/ft2 (lft=30.48 cms) beam of light modulated by 1000HZ, when the R is requlated to the biggest gain, the circuitry will produce 1V virtual value of voltage in output port. Thiscircuitry issuitable foroptics correspondence andwarning system. (View)

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DC motor speed control circuit

Published:2011/3/23 3:32:00 Author:Jessie | Keyword: DC motor, speed control

DC motor speed control circuit
This circuit can be used to control the rotating speed and direction of low power dc motors, series motorsor parallel motors. Motorsseries with rectifier bridge G1, then access them to the power transformer secondary windings n2. If rectifier bridge output terminal is impassability, motor stops, this is like potentiator's sliding contacts RP inmiddle position, if sliding contacts move upward or downward, then motor will rotate positive direction or reverse direction, so it can control the rotating of motor. (View)

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Thermistors protection rectifier circuit

Published:2011/3/23 3:55:00 Author:Jessie | Keyword: Thermistors, protection, rectifier

Thermistors protection rectifier circuit
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CMos drive circuit for LCD

Published:2011/4/12 22:52:00 Author:Rebekka | Keyword: CMos drive circuit

CMos drive circuit for LCD
CD4054 A, CD4055A or CD4056A CMOS direct drive 7 LCD display digit.The circuit has the feature of internal level shift. The feature is to change 5V logical rotation to state-driven consumption LCD. It is integrant for 30V peak AC signal used by the LCD. (View)

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IGBT drive circuit with discrete component

Published:2011/3/23 21:50:00 Author:muriel | Keyword: IGBT , drive circuit, discrete component, TLP560

IGBT drive circuit with discrete component
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4 Direct drive LCD display circuit diagram

Published:2011/4/12 22:42:00 Author:Rebekka | Keyword: Direct drive LCD display

4 Direct drive LCD display circuit diagram
Each part of LCD has individual counter, latch, decoder and driver. Pumping signal feeds back to the motherboard of LCD. When the display section is disconnected, the phase and amplitude of the motherboard and display segment drive signal are the same. It shows no voltage on the 2 ends of display. When the display segment is triggered, its pumping signal phase position will be lager than 180 °, so the square wave voltage is 2 times than power supply voltage value. BCD code input signal can be produced from the dual BCD counter of cascade MC14518. (View)

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Light control alarm circuit(For fire and night burglar alarm circuit)

Published:2011/4/12 22:40:00 Author:Ecco | Keyword: Light control, alarm circuit, fire alarm , night burglar alarm

Light control alarm circuit(For fire and night burglar alarm circuit)
The circuit is available for hunters, fishermen when they want to go out at dawn. The flashlight or inside lights can trigger this circuit, it is also used as a fire and night burglar alarm circuit. Only when the lights turn off, the alarm can be stopped. (View)

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Unipolarity gate drive circuit(0／+15v) IGBT

Published:2011/3/27 22:22:00 Author:muriel | Keyword: Unipolarity , gate , drive circuit, 0／+15v, IGBT

Unipolarity gate drive circuit(0／+15v) IGBT
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Drive circuit with grid turn-off clamping circuit

Published:2011/3/24 20:50:00 Author:muriel | Keyword: Drive circuit, grid , turn-off , clamping circuit, IR1120

Drive circuit with grid turn-off clamping circuit
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Sound control electronic corsage circuit

Published:2011/4/6 4:14:00 Author:Nicole | Keyword: sound control, electronic corsage

Sound control electronic corsage circuit
This circuit is composed of noise source amplifier and LED drive circuit. As sound detection devices, microphone changes acoustic signal into electrical signal, after BG1, BG2 amplification, drive BG3 lights up LED. (View)