Editor Version ×
Standard

1.Easy to use and quick to get started

2.The process supports design scales of 300 devices or 1000 pads

3.Supports simple circuit simulation

4.For students, teachers, creators

Profession

1.Brand new interactions and interfaces

2.Smooth support for design sizes of over 30,000 devices or 100,000 pads

3.More rigorous design constraints, more standardized processes

4.For enterprises, more professional users

Ongoing

STD Arduino shield L_meter

License: Public Domain

Mode: Editors' pick

  • 3.3k
  • 0
  • 18
Update time: 2022-08-03 14:58:04
Creation time: 2016-12-11 19:05:25
Description
![hi know.jpg](//image.easyeda.com/pullimage/gf9949za7HQ4HhA6ACOFFm4wta6HFE9rUOE6W8BI.jpeg) This is the adaptation for Arduino UNO R3 of **Adrzej Janeczek project** “AVT-2813” - Multimeter addition for L measurement. [AVT2813](https://easyeda.com/attachments/2018/5/Ith4EoeB5DQntN5SVfQh8uRW0QIuSud4EErx5dwV.pdf) # Small and cheap shield for Arduino: # ![01TOP.jpg](//image.easyeda.com/pullimage/wmVzkkoDFzz1sPGYhaWgc3fS40whQU5hAycHAYal.jpeg) ![02BOTTOM.jpg](//image.easyeda.com/pullimage/UoubollYCIwky5FgP0ZHPqpyw5Qhk2NAEH0dLgCQ.jpeg) After build ![03MOUNTED.jpg](//image.easyeda.com/pullimage/00GukmZtH3T6mczYslnjlEVOo0awyIB4lv8rFweo.jpeg) You need connect this to Arduino UNO R3 ![04cover.jpg](//image.easyeda.com/pullimage/bho82wa9ZGwICCSYYezPFunzAujy2VDXxjzaxRNv.jpeg) ![05manifest.jpg](//image.easyeda.com/pullimage/5ijWcP5EMP3X9wnFUjBLYHILHjAW0JMrZFha4Vt2.jpeg) Now we can think, how we can measure the inductance of coil… Can we for example counting a magnetic fields lines around the coil ? – Of course NO :-) BUT… but people think and think and created indirectly methods for this… So we can connect the coil into the circuit and we can check how she work. How fast she get the saturation and de-saturation. Simple scheme first: ![06scheme 1.png](//image.easyeda.com/pullimage/4uhNWPAFgo3QP0O6yzBYfm8F3Y8TI0iHUBfaB3r0.png) This scheme is a bit low readable, we can look at this from easy side like this: ![07L meter small.png](//image.easyeda.com/pullimage/gBj1tTSjzJjpErSw59ayO2YPzvBzluYtkuDpk2r6.png) On the first gate we gave rectangular signal (about 128kHZ) from R1/C1 oscillator, which is separated by 3 next other gates. Now signal going to R3/R4/R5/Lx and we have the SAW signal, which going on the next gate. From this gate signal is converted to rectangular signal, where the fill factor is proportional to coil inductance. Last gate reversing this signal phase and send signal to R6/C3 integral circuit. **This circuit get the average voltage level of this rectangular signal, and this is the value of inductance where any uH is after every one 10 mV (1uH/10mV).** Finally we using Arduino as V-meter, and additionally as F-meter for adjust signal from R1/C1 to 128 kHZ. For this we have one tactile switch, which we should pressing by about 1sec. and we can see something like this and using PR1 rotation resistor (this long one): # IMPROVE FOR HC SERIES 74HC14 # **You can use 74HC14, in this case F-meter adjust signal from R1/C1 should be about 260 kHZ.** # CALIBRATION # **If you have known value the coil about 20uH you can calibrate by turn PR1 up to properly value on the measure screen information.** ![08FMETER.jpg](//image.easyeda.com/pullimage/kqCQpulSk2gT92YDuqOvIYQPb4w6EwN3bN8SaLDw.jpeg) Theory we can check on the oscilloscope diagrams: ![09diagrams.png](//image.easyeda.com/pullimage/yCWptAJo9xpDUXDcbSb6gcvpSmajPEGauCrbwmCe.png) And now Lx = 40uH, the fill factor is going up: ![10logic level3 40uh.jpg](//image.easyeda.com/pullimage/HM29uDdyxoBQx1DjkopO5a2slKzOtQGc2pg2FIIz.jpeg) We can look how logic levels gate work: ![11logic level4 40uh.jpg](//image.easyeda.com/pullimage/TaeLekdw1xQfYayFIz5m8LMXnwvFrAMHds2e1GTQ.jpeg) This simple way gave possibility for us how catch the coil inductance. Here you can get firmware for arduino hex and asm file. [Lmeter firmware](https://easyeda.com/attachments/2018/5/sduuWo98trq63FR8ewJ4yrbaEiC9IIijSXi0RVl6.zip) # INSTRUCTABLE # [INSTRUCTABLE](https://www.instructables.com/id/Arduino-Shield-L-Meter/) # ADDITIONAL PICTURES # ![dso_09_13_17_40_58A.png](//image.easyeda.com/pullimage/RiuPytg4AvbdJQZoTX1Pzsndq7zAat1TFO9YAjYO.png) # DIAGRAMS FOR HC SERIES # ![L meter.png](//image.easyeda.com/pullimage/rUsR46Rp0nzNbJdnw19Vx5fkIwmBLYShfLSEVCSL.png) eot.
Design Drawing
schematic diagram
1 /
PCB
1 /
The preview image was not generated, please save it again in the editor.
ID Name Designator Footprint Quantity
1 10k PR1 PR-TRIM_3006P 1
2 Listwa ARK2 ARK_L LISTWA ARK2 1
3 8x1F-H8.5 IOL,POWER 1X08 2
4 10x1F-H8.5 IOH 1X10 1
5 6x1F-H8.5 AD 1X06 1
6 CD74HCT14E U1 DIP14 1
7 1.5 nF C1 C1 1
8 330 R5,R3,R4 R3 3
9 100 nF C2,C3 1206 2
10 10K R6,R1,R2 R3 3
11 10k PR2,PR3 HELITRIM 329Y 2
12 HD44780LCD X2 LCD1602 1
13 MODE MODE TACTILE-PTH-SIDEEZ 1
14 RESET RESET TACTILE-PTH-SIDEEZ 1
15 1 nF C4 1206 1
16 500 pF C5 1206 1
17 4K R7 R3 1

Unfold

Project Attachments
Order File name Download times
1

AVT2813.pdf

18
2

V_328.ZIP

23
3

avt139.pdf

17
4

avt2609.pdf

17
5

avt2683.pdf

20
Project Members
Target complaint
Related Projects
Change a batch
Loading...
Add to album ×

Loading...

reminder ×

Do you need to add this project to the album?

服务时间

周一至周五 9:00~18:00
  • 0755 - 2382 4495
  • 153 6159 2675

服务时间

周一至周五 9:00~18:00
  • 立创EDA微信号

    easyeda

  • QQ交流群

    664186054

  • 立创EDA公众号

    lceda-cn