search

dbuchwald / 6502

DB6502: 65C02 based computer inspired by BE6502
MIT License
145 stars 30 forks source link

Incorrect value for RV1 in BOM for clock module #34

Closed Dave-TR3A closed 4 years ago

Dave-TR3A commented 4 years ago

The BOM for the clock module lists a value of 10K for RV1 (a Piher PT10-LV10-105 potentiometer).

image

That must be a typo: the Piher part number is actually for a 1M potentiometer.

With a 10K pot, the astable circuit generates a square wave with frequency between 62 and 481 Hz, which may be too fast for troubleshooting. Changing to a 1M pot yields a frequency range of 0.72 to 481 Hz.

dbuchwald commented 4 years ago

Thanks for spotting it! I have just corrected it, can you check and let me know if it can be closed?

Dave-TR3A commented 4 years ago

Hi Dawid:

I just looked on GitHub. Unfortunately, I’m not seeing the change you made.

Here is a screen shot from moments ago. It shows that RV1 on the BOM is unchanged, and also shows the URL, date and time.

By the way, I changed the 10K potentiometer on the clock for a 1 M potentiometer. Now I’m able to generate square waves with frequencies ranging from .67Hz to 472 Hz (as measured on my oscilloscope). That’s just what I was hoping for.

Nice job on the clock PCB!

Stay healthy.

Best wishes,

Dave MacKay

From: Dawid Buchwald notifications@github.com Sent: April 8, 2020 3:25 AM To: dbuchwald/6502 6502@noreply.github.com Cc: Dave MacKay dave@mdmackay.ca; Author author@noreply.github.com Subject: Re: [dbuchwald/6502] Incorrect value for RV1 in BOM for clock module (#34)

Thanks for spotting it! I have just corrected it, can you check and let me know if it can be closed?

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/dbuchwald/6502/issues/34#issuecomment-610796642, or unsubscribe https://github.com/notifications/unsubscribe-auth/APC67OG7PRJV5STPSMBNMJLRLQREDANCNFSM4MDJ7KFA .

Dave-TR3A commented 4 years ago

And now the change is showing up. Here’s a screenshot showing it:

Well done! Issue closed.

From: Dawid Buchwald notifications@github.com Sent: April 8, 2020 3:25 AM To: dbuchwald/6502 6502@noreply.github.com Cc: Dave MacKay dave@mdmackay.ca; Author author@noreply.github.com Subject: Re: [dbuchwald/6502] Incorrect value for RV1 in BOM for clock module (#34)

Thanks for spotting it! I have just corrected it, can you check and let me know if it can be closed?

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/dbuchwald/6502/issues/34#issuecomment-610796642, or unsubscribe https://github.com/notifications/unsubscribe-auth/APC67OG7PRJV5STPSMBNMJLRLQREDANCNFSM4MDJ7KFA .

Dave-TR3A commented 4 years ago

Clock module BOM updated to show value of RV1 as 1M ohm.

dbuchwald commented 4 years ago

Thanks a lot, stay safe!