HiLetgo 3pcs Pro Mini ATmega328P 3.3V 8M Module Board with Crystal Oscillator Compatible Arduino Pro Mini Replace ATmega128

Liked - works reliably, takes a lot of abuse and still keeps on tickingDislikes - Not an issue with this specific supplier, but across multiple suppliers the header for the serial link is not consistent. Some suppliers the ground pins are on the right and other suppliers the ground pins are on the left side.

Habe vor einiger Zeit 2×3 Stück dieser Module gekauft. Die Rückgabefrist endete im April. Jetzt, wo ich die Teile nutzen will stelle ich fest, dass es nicht möglich ist ein Programm über Rx/Tx auf das Modul zu bringen. Nach langem probieren habe ich über ISP ein Programm draufgebraucht. Ein einfaches Blinkprogramm, das aber statt im 5s Rythmus im 2,5s Rythmus arbeitet. Also hat das Modul, statt 8MHz 16MHz. Die Spannung stimmt mit 3,3V, was eigentlich nicht spezifiziert ist. Ich kann die Teile also nicht gebrauchen. Einen Kontakt läßt sich über Amazon aber nach Ablauf der Rückgabefrist nicht mehr herstellen. Eigentlich gilt in Deutschland 2 Jahre Garantie. Und nun? Bleibe ich auf dem Schaden sitzen?

Got these to use USB host boards that were designed to go on them. The supplied faulty USB host boards didn't work at all but these little Pro Mini boards are actually pretty good. All the power of an Arduino UNO (with 2 more analog pins) in a tiny package without the space wasting programming circuitry permanently built in. I recommend getting some for the box. I won't even be bothering with Arduino NANO boards anymore. These are smaller and delivered in very reasonable time.

I wish I had taking the time to read the reviews before I bought these boards. Very very poorly made, they even typos in the silk screen pin labels. Like many others have complained about I was unable to upload to them even after burning a new bootloader. After some investigation I found that they had the wrong crystal installed. The 3v3 8Mhz board had a 16Mhz crystal installed. The ATMega328p does not run reliably at 16Mhz with a 3v3 vcc. I ordered boards without USB converters because I had a limited power budget. I am running off of batteries so I really didn't need the regulator. I removed it and flashed the 5v 16Mhz bootloader and then enabled a clock divider in my project code. I can use them now, but I'll never buy form this vendor again!

All three Arduino Pro Minis were successfully used for Mail Alert System project. The board appeared to be resilient and no problems when I accidentally connected 8 - 9 Volt to VCC momentarily. It survived the higher voltage. But I had to learn how to upload the sketch with a trick. For a couple of days, I was not happy at all when I could not upload a sketch. As a one Youtuber said, the reset button must be pressed right after you click on upload sketch. I also did numerous restarted my computer. After I learned the trick, I have no issues with the board. Good purchase. I would give 5 stars if I did not go through the pain of learning the upload process with trick. I would buy again definitely.