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Bareduino328 Plus: Regulate your Bareduino!

Description:For Serious Power (Regulation)
The Bareduino328 Plus brings you everything the Bareduino328 does with the added bonus of including what you need to regulate your power rail and keep your Bareduino’s running smooth. Just one Bareduino328 Plus can be used t0 power several other Bareduinos or other five volt devices.

Package Contents:
• 1 x P-DIP ATMEGA328P-PU programmed with Duemilanove Bootloader
• 3 x Through-Hole 22pF Capacitors (2 for crystal and 1 for Analog power smoothing)
• 1 x Through-Hole HC-49S 16 MHz Crystal (for clock)
• 1 x 5 Volt regulator (peak current 2 A, nominal )
Input Voltage = 7.5 to 18 V
Output Voltage Low 4.8 Volts Nominal 5 Volts  High 5.2 Volts)
• 1 x 22 uF Capacitor (to stabilize power rail during rapid current draw.

Key Features:
• Lower the cost and size of your next project
• Ideal for minimalistic deployments
• easily tie multiple controllers together to perform more complex tasks than possible with a single Microcontroller
• Greatly simplifies the process of adding power to your device, and allows user to safely draw greater current if needed

Pickup your Bareduino328-Plus Now!

circuit diagram bareduino plus

How to make your first Bareduino328 Plus:

First follow all of the directions to make a Bareduino328, once you have finished just follow the steps in this guide to get things rolling on your new device.

The Setup

The following items are needed for construction of your Bareduino328 Plus.

  • Bareduino 328 Plus kit (Built initially as a Bareduino328)
  • Breadboard
  • Jumper wires
  • Grounding strap (chip is ESD sensitive)
Step1 change Capacitor Positions

Step1 change Capacitor Positions


Step 1.) Move the ground end of the two Crystal Capacitors to the ground port on pin 8 as shown in the image to the left. Be careful to not let the crystal lines touch each other (through the capacitors).


Step 2 move ground line

Step 2 move ground line








Step 2.) Remove the extra tiny ground wire from where the Crystal Capacitors had been, and place the end of the long ground cable (green) one spot over to the middle of the three pins that used to be used for the Crystal capacitors (as shown in the image to the right).

Step 3 Insert Voltage Regulator

Step 3 Insert Voltage Regulator





Step 3.) Insert the Voltage regulator being careful to ensure that the device is facing the same way as in the image to the left. The voltage regulator will burn out if you attempt to place the supply voltage on the wrong side of the chip!

Step 4 Tie Chip to Vout

Step 4 Tie Chip to Vout





Step 4.) Place a power wire from the furthest right pin to the chips power rail (pin 7). As long as the Regulator was inserted with the chip type and serial number facing you the Voltage In (VIN) will be on the left most pin, the Ground should always go to the middle pin, and he Voltage Out (Vout/Vdd) will be on the rightmost pin.

Step 5 Insert Brownout Protection Capacitor

Step 5 Insert Brownout Protection Capacitor




Step 5.) Place 22 uF Capacitor between the Ground and Voltage Output pins to provide brownout protection in case there is a momentary increase in current draw that exceeds the ability of your supply or regulator.

NOTE: BE SURE TO ORIENT YOUR CAPACITOR CORRECTLY! (Reference photo below, and be sure to contact us if you have any questions). Failure to place the capacitor with the correct polarity can result in damage to you or your Bareduino.



Always ensure that your Capacitor is polarized correctly!

Always ensure that your Capacitor is polarized correctly!

Step 6 insert supply lines

Step 6 insert supply lines






Step 6.) Connect the Voltage Input and Supply Ground Pins as shown by the long red and green wire respectively in the image to the right.

Step 7.) Connect the power and ground to a DC power supply and rejoice!

 Already built yours? Click here for the Programming guide

Checkout all of the other guides for the Bareduino328 series and please let us know if there is anything else you need to know.

One Response to “Bareduino328 Plus: Regulate your Bareduino!”

  1. Dave Knight April 11, 2012 at 4:21 pm #

    Got the Bareduino Plus (328P with the Uno bootloader installed.

    1 – put the chip into a working Uno board, uploaded a simple sketch, and it works fine.

    2 – built the Bareduino, and it works fine (as verified with a couple LEDs I added, and a blinker sketch uploaded in step 1).

    A comment on the Bareduino Plus Guide – the instructions are great if you are upgrading a Bareduino, but potentially confusing to some who are assembling a Bareduino Plus from the kit.

    3 – Now I’m ready to use it to burn new bootloaders onto the chips with Duemilanove bootloaders.

    Have you made any progress on the Guide for that?

    In the mean time, I’ll see if I can make it work…