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LED and Light Circuit

Index 60

FLUORESCENT_TUBE_DISPLAY_DRIVER

Published:2009/6/15 23:50:00 Author:May

FLUORESCENT_TUBE_DISPLAY_DRIVER
A fluorescent tube or display can be driven with a 4543B IC, as shown. (View)

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4511B_COMMON_ANODE_DISPLAY_DRIVER

Published:2009/6/15 23:49:00 Author:May

4511B_COMMON_ANODE_DISPLAY_DRIVER
The use of a switching transistor (like a 2N2222 or 2N3904) allows use of the CD4511B with a common-anode display. Ry should be chosen to provide about 1 mA to drive Q1 and Rx should provide enough current to drive the display. For this circuit, the transistor gain (HFE) should be at least the ratio of the segment drive current to the current through Rx (View)

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GAS_DISCHARGE_TUBE_OR_DISPLAY_DRIVER

Published:2009/6/15 23:47:00 Author:May

GAS_DISCHARGE_TUBE_OR_DISPLAY_DRIVER
To drive the display, RA should provide a drive of about 1 mA to the gas discharge tube. RB is a current-limiting resistor. (View)

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4543B_7_SEGMENT_LCD_DRIVER

Published:2009/6/15 23:42:00 Author:May

4543B_7_SEGMENT_LCD_DRIVER

The circuit shows a frequently-used method of driving an LCD display. A square-wave drive is necessary for this application. (View)

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7_SEGMENTLEDDISPLAY_DRIVER

Published:2009/6/15 23:41:00 Author:May

7_SEGMENTLEDDISPLAY_DRIVER
AIL IC1 like a 7447 drives a 7-segment commoll anode LED display．Current limiting reslstor R should limit the segment current to the rated value at maxlmum supply voltage A sample calculation is shown (View)

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7_SEGMENT_COMMON_CATHODE_LED_DISPLAY_DRIVER

Published:2009/6/15 23:40:00 Author:May

7_SEGMENT_COMMON_CATHODE_LED_DISPLAY_DRIVER
A CD4511B CMOS LED display driver can be used to drive a common cathode LED display. Cur-rent limiting resistors limit the segment current to the rated value at maximum supply voltage. A sample calculation is shown. (View)

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LED_DISPLAY_LEADING_ZERO_SUPPRESSOR

Published:2009/6/15 23:33:00 Author:May

LED_DISPLAY_LEADING_ZERO_SUPPRESSOR
The diagram shows how to connect 7447-type IC devices for leading-zero suppression in an LED display. (View)

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7_SEGMENT_LCD_DRIVER

Published:2009/6/15 23:32:00 Author:May

7_SEGMENT_LCD_DRIVER
This circuit shows how a 7448 IC is used to drive a 7-segment LCD display. Atn external 50-Hz square wave supplies necessary phase signals to the back plane of the display. (View)

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LARGE_LCD_DISPLAY_BUFFERING_DRIVER

Published:2009/6/15 23:30:00 Author:May

LARGE_LCD_DISPLAY_BUFFERING_DRIVER
Large LCD devices of 1 or more exhibit a large driving capacitance to the driver circuits. To solve this problem, the drive cir-cuit shown (see the figure) introduces a buffer amplifier for each of the three common lines. Each amplifier can be programmed independently for a quiescent current of 10, 100, or 1000μA. In this application, the bias network applies a voltage that sets the three quiescent currents to 100μA.The display driver and triple op amp operate between 5 V and ground, and the COM signals range from 5 V to ≈1 V. To en-sure that these signals remain within the amplifiers' common-mode range, the signals are attenuated by one-half and the buffers operate at a gain of two. The circuit drives eight 1-inch displays, and is suitable for ambient temperature variations of 15°F or Iess.At the highest expected temperature, R1 should be adjusted so that no off segments are visible. (View)

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CASCADED_4026B_COUNTER_DISPLAY_DRIVER_CIRCUIT

Published:2009/6/15 23:21:00 Author:May

CASCADED_4026B_COUNTER_DISPLAY_DRIVER_CIRCUIT
CASCADED 4026B COUNTER/DISPLAY DRIVER CIRCUIT (View)

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4033_DISPLAY_CIRCUITRY_COMMON_CATHODE

Published:2009/6/15 23:15:00 Author:May

4033_DISPLAY_CIRCUITRY_COMMON_CATHODE
TO drive two or more common-cathode displays two or more 4033 decode counters can be cascaded (View)

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Five flash lamp string circuit (4)

Published:2011/7/5 21:54:00 Author:zj | Keyword: Five flash, lamp string circuit

Five flash lamp string circuit (4)
In the graph, SSR1 to SSR5 use TAC081 IC type solid state relay. T uses 220V / 6V, 5VA small quality requirements of power transformers. Itrequires power fora long time without heating. (View)

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Five flash lamp string circuit(2)(M1512P)

Published:2011/7/5 22:00:00 Author:zj | Keyword: Five flash, lamp string circuit

Five flash lamp string circuit(2)(M1512P)
(View)

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The time-base circuit AC light regulating lamp circuit

Published:2011/7/5 22:15:00 Author:zj | Keyword: The time-base circuit, AC light regulating lamp circuit

The time-base circuit AC light regulating lamp circuit
(View)

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Ten flash lamp string circuit

Published:2011/7/5 22:22:00 Author:zj | Keyword: Ten flash, lamp string circuit

Ten flash lamp string circuit
As shown in the figure itis composed of a digital integrated circuit CD4017 consisting of ten flash lamp string controller. VT1 ~ VT10use MCR100-8 type small outline of a unidirectional thyristor. (View)

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SS0622 Touching stepping dimmer circuit

Published:2011/7/24 22:46:00 Author:Ecco | Keyword: Touching stepping dimmer

SS0622 Touching stepping dimmer circuit
Touching stepping dimmer composed of the SS0622 IC is shown as the chart, and it canprovidetwo ways of four-gear stepping touching dimmeraccording to the needs of the users. (View)

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Crossed flash circuit

Published:2011/7/16 3:39:00 Author:leo | Keyword: Crossed flash

Crossed flash circuit
In order to get different colors, we divideLEDs into two lines horizontally and two lines vertically. And we use two kinds of colors of LED to make it come true. LM324(IC1) is the center of saw tooth oscillator circuit while IC2 and IC3 are the center of comparator, whose referring voltage is gotten through resistance series R13 to R20.And VR1 is used to adjust the referring voltage value of comparator A4 to A10. (View)