If I power the uno dc power socket from 5V there's a diode and 5V reg dropout voltage so the 328 is running at about 3.6V.
at 3.6V the clock should be lowered to 12MHz . is #chip mega328p,12 ok?
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This is nice- I'm running a uno from a regulated 5V in to the dc power socket and driving an ili9341 straight from the uno and its working. This new to me. no logic converter and using mega328p,16.
edit -- this display does not work at 5V logic...so easy fix?
The uuno 5V out measures 3.3V. This goes to display vdd which goes to a 3.3V reg. You're supposed to bridge a link to bypass the reg to run from 3.3V but I haven't so the display is probably running at 2.7V.
I'm suprised it worked. I haven't seen it posted as a solution for using 3.3V logic devices on arduino sites. "Just run the uno from 5V"
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Hi. I'm fed up with logic level shifters and my experience with pics at 3.3V has been ok and not.
I was looking at switchable unos using ATMega328PU-PH
https://www.ebay.co.uk/itm/Arduino-UNO-R3-Rev3-328-ATMEGA328P-ATMEGA16U2-Compatible-5V-3-3V-Logic-Levels/173654525903?hash=item286e9dc7cf:g:ZAQAAOSwNUlb9oM5:rk:12:pf:0
but hopefully a bit cheaper.
Will this or similar be ok with GCB? just use #chip mega328p,16 ?
regards.
If I power the uno dc power socket from 5V there's a diode and 5V reg dropout voltage so the 328 is running at about 3.6V.
at 3.6V the clock should be lowered to 12MHz . is #chip mega328p,12 ok?
This is nice- I'm running a uno from a regulated 5V in to the dc power socket and driving an ili9341 straight from the uno and its working. This new to me. no logic converter and using mega328p,16.
edit -- this display does not work at 5V logic...so easy fix?
Last edit: stan cartwright 2019-02-09
I did say. The voltage is critical. In the previous thread.... no more than 4.81v (from memory).
And, if it is working... what is to be fixed?
Last edit: Anobium 2019-02-09
The uuno 5V out measures 3.3V. This goes to display vdd which goes to a 3.3V reg. You're supposed to bridge a link to bypass the reg to run from 3.3V but I haven't so the display is probably running at 2.7V.
I'm suprised it worked. I haven't seen it posted as a solution for using 3.3V logic devices on arduino sites. "Just run the uno from 5V"