has anybody seen this uno board, I wonder what is the purpose of the second crystal.
it must be second clock, if I could use it to drive connected circuits it would be great
I am trying to connect Toshiba linear sensor TCD1304AP it requires minimum clock 0.8 MHZ
while on any pins I can get maximum 120 KHz assuming there is no extra code to run.
I could do the loop to drive the TCD1304AP only at 10 Khz and collect data
I posted it just moment ago by mistake in different section
does anybody know the purpose of the second clock (crsytal) and how to use it ?
It is already in use.
The right hand 12MHz 16MHz crystal is for ATmega328, the 12MHz crystal on left side is for the CH340G usb to serial convertor.
ED201:
I posted it just moment ago by mistake in different section
In the future when you do something like that you should click the "Report to moderator" link at the bottom of the post and request it to be moved to the appropriate section instead of cross posting. Of course it's best to make sure to post to the right section to begin with so as to avoid creating extra work for the moderators.
avr_fred:
The 16MHz cerstal is for ATmega328
These goofy "WVACAT" boards actually have a 12 MHz crystal for the ATmega328P.
Crystal question answered here: [MERGED] Uno with 2nd crystal from WAVGAT - Microcontrollers - Arduino Forum
As for the output of the TCD1304AP, you’ll probably need an external adc due to the minimum data rate required by the device.
Goofy indeed, 12 MHz plain as day in the photo. Ya get what cha ‘ya pays for with some vendors.
I wonder if they actually recompiled the bootloader, or if it was an reel loading mistake on the smd placement machine?
In either case, it’s MiniCore to the rescue.
Threads merged.
avr_fred:
I wonder if they actually recompiled the bootloader, or if it was an reel loading mistake on the smd placement machine?
Evidently the manufacturer does supply their own hardware package to support this board:
But yeah, I'd be trying MiniCore first if I had one. It's doesn't instill great confidence that the manufacturer can't even spell their own brand name correctly on the PCB silkscreen.