Arduino Stack Exchange
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Questions tagged [arduino-pro-mini]

An Arduino Pro Mini is a small microcontroller derived from the Arduino Uno using the ATmega328. It is unique for its tiny size and the required external FTDI adapter.

Arduino Pro Mini is a microcontroller board based on the ATmega328. With 14 digital IO pins, 8 are analog inputs, 6 digital pins capable of PWM output. Programming and power is done via a six pin header which can be connected to a FTDI cable. The official board was designed and is manufactured by SparkFun Electronics, however there are many clones out there. It exist both 5V/16MHz and 3.3V/8MHz. It can be used with UART, SPI and I2C.

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Most compact method of powering Arduino from wall socket

There are a lot of methods to power an Arduino from a large range of voltages: USB cable from PC or from a phone charger or an USB hub step down converters step up converters switching power supply batteries (connected to the power jack or USB or…
vlad b.
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Arduino Pro Mini (3.3V version) input voltage range / tolerance

I have a few Arduino Pro Mini clones (cheap Chinese stuff) and would like to power them with 12V power supply (same as fan voltage). According to the Arduino Pro Mini spec the RAW pin can take 3.35-12V (3.3V model). In practice this means a 12V PSU…
DominicM
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All the differences between Arduinos: Pro Mini & Pro Micro

I'd like to know the differences between these two boards: Arduino Pro Mini and Arduino Pro Micro. Even if I've read this and this related post, it is not clear enough. I've always used the Arduino Uno or Leonardo and I'm a little bit scared of…
nkint
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very lightweight low power microcontroller with memory?

I have build a couple of projects using arduino. For a new project I want to log skin surface temperature vs. time (just perhaps a few times per day) and possibly other easy to obtain info such as voltage. I need to make everything as small and…
Shara
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Problem programming Mini Pro via Arduino as ISP

I just picked up a pair of Arduino Mini Pro 5v clone boards (Inland, sold at Microcenter, currently $4 USD) and I wanted to use my Uno as an ISP like I've done with ATmega328 and ATtiny85 chips before. I've programmed the Uno with the instructions…
Dennis Munsie
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Audio Frequency White Noise generation using Arduino Mini Pro

For DIY, how to program Arduino Mini Pro to act as an Audio Frequency White Noise generator? Presumably, a) using one Digital Output pin b) feed to a simple passive RC low pass filter to reduce out of band signal c) feed to a simple class-D IC…
EEd
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Measuring li-ion that arduino is running from

I am using a 5v Arduino pro mini (with regulator and power led removed). I have been reading how to accurately measure Li-ion batteries when powering from the same battery you are trying to measure from. Using the 1.1V internal analog reference to…
Lindsay Cox
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Arduino 16 MHz with only 3.3V?

Now I have these Arduino Pro Mini from Sparkfun. They are the latest version that I know (yeah, it's the one that have those horrible misaligned pins). Now they are designed around the ATmega328P and have a 16MHz crystal on them. Now, my question…
Dat Ha
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Watchdog timer stuck in restart loop? (green led flashing)

I am trying to set up a way to reboot arduino on command. The code below should do that but it seems like my arduino just get's stuck in some sort of a loop where I cant upload or get any serial output. The green led (pin 13) flashes very fast. The…
DominicM
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Pin 13 fires relay when powering on... How to disable?

Pin 13 fires relay when powering on... How to disable? I'm using pro mini 5v 16MHz and a DC 12V 2 Channel Relay Module Optocoupler. The relay Jd-VCC is powered by a 12V and it's VCC is 5V (the same as Arduino VCC). The relay is active low and I…
P-nut
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Programming arduino via bluetooth module issue

I followed a tutorial on how to setup arduino and bluetooth so it can be programmed without usb cables. I didn't use capacitors or resistors asthere doesn't seem to be a need for them. I have the serial output appearing on arduino serial console via…
DominicM
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Why bootloader sizes differs from 0.5 to 8 kilo bytes for different boards?

According to official web info bootloader sizes are 0.5, 2 and 8 kilo bytes for UNO, Pro mini and ATMega2560. I believe all three boot loaders do similar job of receiving serial link data and write to Flash memory. UNO and Pro mini use same/similar…
EEd
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Crash when datalogging MPU-6050 to SD card

On an Arduino Pro Mini, I'm using Jeff Rowberg's stuff in i2cdevlib to read from the MPU6050, and using SdFat to write data to an SD card. Each part in isolation is fine, but when both DAQ and logging are in use the Arduino locks up after a few…
Craig Graham
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delete the memory or re-upload a program

At the moment I am following the instructions of this project https://github.com/JoernL/LimiTTer. Besides the peripheral parts like a Bluetooth module and an NFC module, the central unit is an Arduino Pro Mini. I am a bloody novice with Arduino and…
verticoe
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avrdude: stk500_getsync(): not in sync: resp=0x00

I have arduino pro mini 5V, 16M ATMega328 and CP2102 USB to TTL. I've wired them like this: When I try to upload a sketch to the arduino board I'm getting the following error: avrdude: stk500_getsync(): not in sync: resp=0x00 The board type and…
Deepsy
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