frequency meter pic led display

• Apr 9, 2003

• #21

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tgq

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lc meter pic16f628

Yes atmel2000, if we want to make another project like me, it will be much more simpler to use a good compiler with built-in math float and LCD routines, instead of loosing time trying to understand a disasm hex file

 

• Sep 2, 2003

• #22

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hadihf

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lc metr

Hi tgq,
Do you have the PIC16F628 files for the LC meter? I have 628 and not 622

 

• Sep 2, 2003

• #23

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Lucas

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l-meter at89c2051

I find an other at:
**broken link removed**

it used a ATMEL chip and its completely free, with the source.

I am going to try
lucas

 

• Sep 8, 2003

• #24

Fragrance

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89c2051 lc meter

hi,

nice link i also give a try to it and told the result after testing it

good work

 

• Oct 3, 2003

• #25

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hadihf

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lc metre

Hi,
If you can understand turkish... :? try this...but it is usefull anyway

**broken link removed**

Regards

 

• Oct 18, 2003

• #26

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hadihf

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lc-meter-pic16f628

Hi,
I have build the 'good LC meter' and have some problem and experience to share,
First the experience 8)
-the coil for F1 showd be of very low resistance<<100milliohm and wide range core ferrite material 20KHz ~ 1MHz.
-use a trimmer of 10~20p parallel with Caliberation Cap.
Problems
- how to minimize stray inductance?
- the stray source..switches, tracks etc. etc can somebody guide on track layout...component sellection etc.
I am attaching an excell sheet for F1 & F2 behavior while changing C caliberation.

 

• Oct 19, 2003

• #27

SphinX

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make lc meter-electronic-schematic.php.htm

Hi,

This LC is the same as the one described here
But with nice PCB + asm&hex for pic16f84

Pharaoh Of Egypt

 

• Oct 20, 2003

• #28

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hadihf

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lc meter pic 628

Hi.
FIY, in this latet post for LCM with PIC16F84, the Ccap is actually 1000p and not 1020p as wrongly shown on schematic(check in asm!). I gues this is the earliest version of a/a/d/e/ LC meter with PIC16C61...when it was free...modified for PIC16F84...the switches are 2PST...with 4PST contact is improved.

look at www.freddospage.nl

Regards

 

• Oct 20, 2003

• #29

Fragrance

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l-c meter lcd nokia3310

hadihf said:

Hi.
FIY, in this latet post for LCM with PIC16F84, the Ccap is actually 1000p and not 1020p as wrongly shown on schematic(check in asm!). I gues this is the earliest version of a/a/d/e/ LC meter with PIC16C61...when it was free...modified for PIC16F84...the switches are 2PST...with 4PST contact is improved.

look at www.freddospage.nl

Regards

Click to expand...

hi friend hadihf and Pharaoh of Egypt

I realy thankfull for pharaoh of egypt that he provide the lc meter in the result hadihf provide the orginal link to the page which have lot of other use full information because that the right way, any way thanks for the both, i think that the right thing which we are wiating for pic 16F84 based lc meter

 

• Nov 17, 2003

• #30

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radiohitplus

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lc meter nokia 3310

Dear friends, I have to built the LCmeter with the plans found in **broken link removed**

but when i turn on the circuit, it LCD show four black boxes. what's happen somebody can help me?

 

• Nov 18, 2003

• #31

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hadihf

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lc meter aade

Hi,
You have the incorrect fuse settings, reprogramm with

WDT - off
BOD - on
OSC - XT

Regards

 

• Dec 3, 2003

• #32

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Saulius

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l/c meter hex fil

Hi,

I built this https://www.hw.cz/constrc/lc_metr/ LC meter. Now I need to calibrate it. So the question is not about calibration, but about coil used in LC meters. What kind of coils are you using? Do you wind it manualy or you use factory made coils? For the test I use the 150 uH choke (small green like resistor). I'm not sure could I use it?

Thanx.
Saulius

 

• Dec 3, 2003

• #33

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pool_77

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pic16f84 lc meter

You can use it...
but:
if you use L with high serial resistance, you will lose accuracy on higher capacitors (e.g. 100n and up, which have not good Q - paper, and some plastic).

 

• Dec 4, 2003

• #34

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Saulius

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lc meter brief

pool_77 said:

You can use it...
but:
if you use L with high serial resistance, you will lose accuracy on higher capacitors (e.g. 100n and up, which have not good Q - paper, and some plastic).

Click to expand...

Thanx for replay.
So, what kind of coil do you recomend?

Saulius

 

• Dec 8, 2003

• #35

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phongwiroon

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lc meter schema

here www.electronics-tutorials.com
is another lc meter

 

• Dec 21, 2003

• #36

SphinX

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lc-meter.asm

Hi,

In the next EPE feb 2004 issue.
You will find a project for LCF Meter using PIC16F628
This meter measure

L 1uH 10H
C 1pF 6500uF
F 0.05HZ 5MHZ

The design depends on the NAND CMOS gates to construct the oscillator.

Bye

 

• Dec 26, 2003

• #37

M

mgajo

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lc meter atmega

**broken link removed**

LC meter with pic for 38$ :?

 

• Jan 2, 2004

• #38

glenjoy

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lm311 oscillator

Can discuss here the accuracy of readings? Thanks. :?:

 

• Jan 3, 2004

• #39

glenjoy

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lc meter scheme

cipo said:

Hi!

Here is another link with full description: https://www.hw.cz/constrc/lc_metr/

Cipo

Click to expand...

Are there any comments in this design?

 

• Jan 5, 2004

• #40

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hadihf

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lc-meter pic16f84

Hi,
Here is PCB in PDF to scale...just print