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Digital Tachometer for record player (LCD display)
Digital Tachometer for record player (LCD display)
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Old 12th February 2019, 04:13 PM   #371
tauro0221 is offline tauro0221  United States
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Hi,
He can open the text file copy it and then open the Arduino IDE window and paste it in the IDE window then save it in the INO format..
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Old 13th February 2019, 05:48 AM   #372
Rajkumar_ is offline Rajkumar_  India
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I have changed "tacho.ino' but still I have problem with loading sketch file to Arduino Nano.
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Old 13th February 2019, 05:52 AM   #373
alexandro is offline alexandro  Bulgaria
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Default Digital Tachometer for record player (LCD display)

Can you please show us the error message?
The folder containing the .ino file must be the same name as the name of the file. In your case the folder name should be “tacho”.
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Old 13th February 2019, 12:28 PM   #374
Pyramid is online now Pyramid  United States
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Verify that you have "Arduino Nano" selected as the device under menu item Tools/Board.
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Old 15th February 2019, 08:12 AM   #375
Rajkumar_ is offline Rajkumar_  India
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Thank you for all, when very file sketch show message "Compiling File Done" when loading file having message "loading Problem" I have suspect board having problem! Earlier I have same experience on Arduino Uno then replaced board solve problem.
Yes I have selected "Arduino Nano" installed driver and selected com port. Thanks Rajkumar
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Old 15th February 2019, 09:40 PM   #376
raymondo is offline raymondo  United Kingdom
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Just want to say thanks again for sharing this. It helped me confirm a suspicion that my speed was drifting a little . You could hear it on sustained notes . Readings would vary from 33.22 to 33.45 or so in a seemingly periodic fashion. Strip down and clean of everything and oiling the motor has now got it perfect. Only the last digit bobbles a bit say 0.002 each way . Without this tool I would never have managed to correct this for certain. Tremendous.
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Old 18th February 2019, 05:15 AM   #377
Rajkumar_ is offline Rajkumar_  India
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Hi I have solve problem loading "Tacho" sketch file to Arduino Nano with LCD 16x 2 12c module. The problem is "Processor selection" I was selected earlier "ATmega328P" then solved by I select ATmega328P (old Bootloader) find below screenshot. Now working perfect so Turntable Tachometer meter can work on Nano or Uno with LCD 16x2 12c module. Thanks Rajkumar
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File Type: jpg IMG_20190217_110030.jpg (979.0 KB, 68 views)
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Old 20th February 2019, 09:12 AM   #378
Andr039 is offline Andr039
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Hi, guys
my first post here
Alexander posted a thread about this tach at lencoheaven (with link to original thread here) and i tried to build it but failed. Could you be so kind to help finding out what's wrong with my tach?
I got a Chinese Uno, installed microchip CH340G driver (instead of FT232RL), connected Uno with LCD, downloaded the last version of the script and i now i can see the "RPM ---" text at LC display. Unfortunately, i got four pins opto sensor instead of three and it's got marks A0, D0 addition to GND and VCC. I tried to connect A0 to pins 3 and 2 (A2 and A3 on Arduino Uno board) with no results. When i move my finger neaby the sensor, its diode blinks but it's not resulted on changing RPM on LCD. Any ideas how to connect a four pins sensor correctly to the Uno board? or may be some changes it the sketch file too? Thank you, guys
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Old 20th February 2019, 02:23 PM   #379
Pyramid is online now Pyramid  United States
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@andr039

I'm not familiar with the opto module you have, but my guess is that AO is an analog output and DO is a digital output. You should verify that one or both of these pins goes to ground when it senses the mark on the platter (it should stay at ground if you stop the platter in this position). Use a DC voltmeter to determine this.

This (one) output should be connected to digital input 3 on the Arduino PCB. Pin 2 on the Arduino is a test point OUTPUT and should not have anything connected to it.
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Old 20th February 2019, 05:30 PM   #380
Andr039 is offline Andr039
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Quote:
Originally Posted by Pyramid View Post
This (one) output should be connected to digital input 3 on the Arduino PCB. Pin 2 on the Arduino is a test point OUTPUT and should not have anything connected to it.
Follwing your advice i connected DO to pin3 of digital inputs, got no results and unpluged the Arduino power supply. When i turned it on a while later, it has started working. Magic, practically
Thank you! Now i need to solder the capacitor
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