Low Cost Custom Prototype PCB Manufacturer

Measuring and Test Circuit

Index 9



Bug Detector with Beep

Published:2013/2/17 20:21:00 Author:muriel | Keyword: Bug Detector, Beep

Bug Detector with Beep
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Mini Bug Detector

Published:2013/2/17 20:21:00 Author:muriel | Keyword: Mini Bug Detector

Mini Bug Detector
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Solar Energy Meter

Published:2013/1/31 19:52:00 Author:muriel | Keyword: Solar Energy Meter

Solar Energy Meter
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Electronic Distance Meter

Published:2013/1/30 21:01:00 Author:muriel | Keyword: Electronic Distance Meter

Electronic Distance Meter
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Unijunction transistor trigger capacity detection circuit

Published:2013/1/30 1:25:00 Author:Ecco | Keyword: Unijunction transistor , trigger capacity, detection

Unijunction transistor trigger capacity detection circuit
DMM hEF spigot (NPN block)   (View)

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PIC Harmonic Distortion Meter

Published:2013/1/29 21:27:00 Author:muriel | Keyword: PIC , Harmonic, Distortion Meter

PIC Harmonic Distortion Meter
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Simple Power Meter

Published:2013/1/29 1:34:00 Author:muriel | Keyword: Simple , Power Meter

Simple Power Meter
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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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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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Experimental 1 KHz Synchronous Detector

Published:2013/1/25 1:22:00 Author:muriel | Keyword: Experimental , 1 KHz, Synchronous Detector

Experimental 1 KHz Synchronous Detector
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Rapid heart rate meter (CD4518, CD4046, CD4511)

Published:2013/1/24 1:38:00 Author:Ecco | Keyword: Rapid , heart rate , meter

Rapid heart rate meter (CD4518, CD4046, CD4511)
Heart rate meter and frequency meter are actually belong to the same class of measuring instruments, but heart rate meter's time the gate is just 1min rather than 1s. For A measuring instrument, 1 min measuring time is not only a long time, but it is difficult to ensure the accuracy of measurement. Therefore it must transform the measurement to match the rapid and accurate requirements. The figure shows a heart rate measuring instrument circuit, and it is consistent with the rapid and accurate requirements.   (View)

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The infrared pulse meter (NE555, CD4553, CD4543)

Published:2013/1/24 1:22:00 Author:Ecco | Keyword: infrared pulse meter

The infrared pulse meter (NE555, CD4553, CD4543)
The so - called infrared pulse meter's sensor for picking up the signal uses infrared sensors. The circuit is shown as figure. Figure (a) is the placement of the sensor and finger; (b) is schematic diagram; (c) is the Pin Function FIG of LM11, CD4049.   (View)

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The ceramic crystal Tester (CD4553, CD4040, CD4543)

Published:2013/1/24 1:18:00 Author:Ecco | Keyword: ceramic crystal Tester

The ceramic crystal Tester (CD4553, CD4040, CD4543)
Ceramic crystal is the crystal oscillating element for infrared remote control transmitter, it has higher damage rate, and it is often difficult to determine whether it is good or bad in the overhaul. The detector shown in figure can quickly determine whether it is good or bad, so it provides a great convenience for overhaul. The instrument is actually a three-digit explicit frequency meter, and its reading unit is represented in kHz.   (View)

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Transistors simple test circuit diagram

Published:2013/1/23 1:11:00 Author:Ecco | Keyword: Transistors, simple test

Transistors simple test circuit diagram
The transistor is one of the most commonly used devices in electronic circuits, and it is often to be tested, sometimes it is very troublesome to use a multimeter to test. The instrument is simple to manufacture, and the test results are very good, and it can fully meet the general requirements. The circuit schematic is shown as figure.   (View)

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DC capacitor tester with 555

Published:2013/1/23 2:36:00 Author:Ecco | Keyword: DC capacitor tester, 555

DC capacitor tester with 555
The tester is composed of the pulse generator, monostable trigger, DC amplifier and header indicating circuit. It can measure npF to 10μF capacitance. The range is divided into 0 ~ 100PF, 0 ~ 1nF, 0 ~ 10nF, 0 ~ 100nF, 0 ~ 1μF, 0 ~ 10μF.   (View)

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RF Transmission and detection/measurement example

Published:2013/1/22 21:20:00 Author:muriel | Keyword: RF Transmission , detection, measurement

RF Transmission and detection/measurement example
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1 KHZ INDUCTANCE METER PROJECT

Published:2013/1/22 21:09:00 Author:muriel | Keyword: 1 KHZ, INDUCTANCE METER, PROJECT

1 KHZ INDUCTANCE METER PROJECT
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Experimental 1 Khz Inductance Meter

Published:2013/1/22 21:09:00 Author:muriel | Keyword: Experimental, 1 Khz, Inductance Meter

Experimental 1 Khz Inductance Meter
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Timekeeping test circuit

Published:2013/1/22 20:58:00 Author:muriel | Keyword: Timekeeping test circuit

Timekeeping test circuit
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DS interface test tool

Published:2013/1/22 20:56:00 Author:muriel | Keyword: DS interface , test tool

DS interface test tool
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