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PRO MINI 328, 5V / 20 MHZ

CAT # ARD-18 (1 Review) Write a Review

$4.90 each
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Product Description
This is a 5V Pro Mini running the 20MHz bootloader. The Pro Mini does not come with connectors populated so that you can solder in any connector or wire with any orientation you need. We recommend first time users start with the Uno R3 (our CAT# ARD-21). It's a great board that will get you up and running quickly. The Pro series is meant for users that understand the limitations of system voltage (5V), lack of connectors, and USB off board.

This board connects directly to the FTDI Basic Breakout board and supports auto-reset. The Pro Mini also works with the FTDI cable but the FTDI cable does not bring out the DTR pin so the auto-reset feature will not work.

Features:
· ATmega328 running at 20MHz with external resonator (0.5% tolerance)
· USB connection off board
· Dimensions: 0.7 x1.3" (18 x 33mm)
· Supports auto-reset
· 5V regulator
· Max 150mA output
· Over current protected
· Weighs less than 2 grams!
· Reverse polarity protected
· DC input 5V up to 12V
· On board Power and Status LEDs
· Analog Pins: 8
· Digital I/Os: 14
Spec sheet available in PDF format.
WARNING: May cause cancer or reproductive harm.
California Prop. 65
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Customer Reviews (1 Review)

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ARD-18 "20 MHz" Pro Mini

Reviewer: from near Philadelphia, PA

Despite saying that this is a 5-V 20-MHz board, it seems to work fine with the standard Arduino ProMini 5-V 16-MHz board selection in the IDE. I checked it with a DHT22 temperature/humidity sensor, which is sensitive to board timing issues, and it works as expected. The pin descriptions are printed only on the back side of the board, which makes it more difficult to work with if you add headers and plug it into a breadboard. (Take a closeup photo of the back of the board before you add headers.) You wouldn't want to mount it upside down on a breadboard, with the pin descriptions showing on top, because that would eliminate access to the reset button. It does support I2C devices through pins A4 (SDA) and A5 (SCL). There are cheaper Pro Mini clones available all over the web, but this board is OK and the $5 price is not bad. As noted, like the standard Pro Mini, you will need an FTDI cable or basic breakout board to program it.

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