Sorting your 5V 16MHz Arduino Pro Minis from your 3.3V 8MHz
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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Brilliant video, I have been using 5v pro minis with the voltage regulator removed, with an 18650 cell.
My question is , if I set the pro mini to 8mhz but it still has a 16mhz resonator will it work at 3v?
Easy way is off course just measure the voltage: RAW something over 5V gives VCC = 3.3 or 5V.
Good stuff. Worth watching .
Please a board with regular marked S8PK regulator
I have a 5V 16Mhz Pro Mini and the resonator says A4.
I can't program arduinos mini at 8Mhz…. uploading fail every time. Only I can at 16Mhz…
"stk500_recv(): programmer is not responding " appears when cristal is no t 16Mhz…. I install minicore support, selec 328p at 8Mhz external, etc etc and fail
When I select pro, promini…. same result, fail
🙁
I had a strange incident
I bought Pro Mini – ATMega328, 5v-16 Mhz version.
I just realized that the project I was working on was using a TTL 3.3v device (for example: ESP8266).
In simple terms, I had to use a level shifter to change the TTL 5v Pro Mini to 3.3v, but I didn't want to because it wasted energy, money and space.
Then I was fun, changing the power supply voltage of the VCC Pro Mini from 5v to 3.3v. And surprise! no problems at all when running the program!
The TTL on my Pro Mini automatically changes to 3.3volt, so I don't need to use a level shifter.
Conclusion: There are several Pro Mini versions of 5volt 16Mhz that are flexible, can be changed to a 3.3volt 8Mhz version simply by changing the VCC Voltage
Can an arduino be powered by a 4.2 v battery ?
Very informative & useful, thanks!
what is the 4BMD voltage reg.?
I you replace the 16mhz resonator with a 20mhz resonator are you considered an arduino overclocker?
the 2 5V arduinos I got have a 16.000 mark on the resonator, Im confused xD
good video
👍
Why don't you just hook em up to a low supply voltage (5 volt to start with) and look for a 3.3 volt output ? Save a lot of pissin' around.
All the Arduino Pro mini that I've bought in the last 3 years are all red reset button = 3.3V, black or silver = 5V.
Wonder why, I'm talking about at least 60 pieces from about 5 different suppliers.
You also can set fuse to activate Clock output on PORTB0 (Pin 8) and then simply measure it 😉