![]() This instructable describe the design of the adapter board. Making small experimental projects require the presence of a breadboard.Īll these problems are solved by the Arduino Nano to Uno conversion board developed by me.For the generating of the internal 3.3V is used the embedded in the Atmega328 voltage regulator, which can not provide currents higher than 100-150 mA.External power supply source different than 5V can not be used - no DC jack presents.Extension shields can not be used directly with Arduino Nano.But Arduino Nano has also some disadvantages compared with Uno. Additionally to its smaller size comparing with Arduino Uno, the Nano board has also the advantage to have two more analog inputs A6,A7. In Ebay now Chinese versions can be bought for less than 3 USD. It is based on the Atmega328 chip, what makes it as powerful as the biggest his brother Arduino Uno, but it can be obtained for less money. Maximum current draw is 50 mA.įull Arduino description and specifications can be found here.Arduino Nano is a nice, small and cheap member of the Arduino family. A 3.3 volt supply generated by the on-board regulator. Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). This pin outputs a regulated 5V from the regulator on the board. You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin. The NANO has two more analog pins, however. ![]() The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). The Arduino NANO pins, similar to the UNO, is divided into digital pins, analog pins and power pins. If using more than 12V, the voltage regulator may overheat and damage the board. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. ![]() The board can operate on an external supply of 6 to 20 volts. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. The power source is selected automatically.Įxternal (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The Arduino Uno can be powered via the USB connection or with an external power supply.
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