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Index 191

AT89C4051 as RTC

Published:2013/1/27 23:52:00 Author:muriel | Keyword: AT89C4051 , RTC

AT89C4051 as RTC
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The 7-segment driver using CMOS shift register 4094.

Published:2013/1/27 23:51:00 Author:muriel | Keyword: 7-segment driver, CMOS shift register, 4094.

The 7-segment driver using CMOS shift register 4094.
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Hardware schematic of xTimer V1.0.

Published:2013/1/27 23:50:00 Author:muriel | Keyword: xTimer V1.0.

Hardware schematic of xTimer V1.0.
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Circuit Diagram for Digital Clock

Published:2013/1/27 23:50:00 Author:muriel | Keyword: Digital Clock

Circuit Diagram for Digital Clock
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Pure Sine Inverter

Published:2013/1/27 23:49:00 Author:muriel | Keyword: Pure , Sine Inverter

Pure Sine Inverter
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Single-Side PCB for Easy Downloader V1.1 2

Published:2013/1/27 23:48:00 Author:muriel | Keyword: Single-Side PCB

Single-Side PCB for Easy Downloader V1.1 2
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Single-Side PCB for Easy Downloader V1.1

Published:2013/1/27 23:47:00 Author:muriel | Keyword: Single-Side PCB

Single-Side PCB for Easy Downloader V1.1
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the LED

Published:2013/1/27 23:45:00 Author:muriel | Keyword: LED

the LED
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Precision instrument amplifier circuit diagram

Published:2013/1/25 0:55:00 Author:Ecco | Keyword: Precision instrument amplifier

Precision instrument amplifier circuit diagram is shown as figure: (View)

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Digital electronic watch calibrator (CD4518, CD4011)

Published:2013/1/25 1:44:00 Author:Ecco | Keyword: Digital , electronic watch calibrator

Digital electronic watch calibrator (CD4518, CD4011)
Quartz digital electronic watches have high timing accuracy, and accuracy calibration is required in the production or after repairing. The dedicated calibration instrument is expensive, and it is not suitable for amateur. You can use a homemade single CMOS digital circuit, it is cheap and applicable The following homemade digital electronic table calibrator is shown as figure. IC4 ~ IC9 use seven-segment decoder driver circuit CD4543; IC10, IC11 use CD4011, IC12 selects four - two -input NOR gate CD4001. (View)

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The electronic pulse meter (CD4553, CD4511)

Published:2013/1/25 1:30:00 Author:Ecco | Keyword: electronic pulse meter

The electronic pulse meter (CD4553, CD4511)
Pulse meter and heart rate meter is actually a kind of instrument with another name, and two instruments use different sampling sites. Heart rate meter usually samples from the chest, but the pulse analyzer general samples from the wrist. The following electronic pulse instrument is shown as figure. (View)

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Sixteen-channel digital display automatic inspection circuit (CD4520, CD4511, CD4067)

Published:2013/1/25 1:18:00 Author:Ecco | Keyword: Sixteen-channel , digital display, automatic inspection

Sixteen-channel digital display automatic inspection circuit (CD4520, CD4511, CD4067)
Automatic inspection circuit is used for the detection and control of multiple production equipment, the inspection circuit can make timing inspection for 16 sets of production equipments. It consists of patrol pulse generator, sixteen automatic patrol circuit and channel digital circuit, and it is shown in the figure. (View)

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AD7543 12 - bit D / A converter

Published:2013/1/25 1:01:00 Author:Ecco | Keyword: 12 - bit D / A converter

AD7543 12 - bit D / A converter
AD7543 has serial input and slower number passing, but the desired signal wiring is less, and it is convenient for optocoupler isolation, it is suitable for telecommunication applications, therefore, it is easily connected with the microcontroller. Similar model: MP7543, and its reference voltage is supplied by an external voltage. AD7543's pinout and internal block diagram is shown as figure: (View)