{"title":"RedBoard Plus Arduino-Compatible Development Board","handle":"sparkfun-redboard-plus","url":"/products/sparkfun-redboard-plus","description":"This Arduino-compatible development board keeps the familiar Uno-style layout while adding a few genuinely handy upgrades for modern projects. Built around the ATmega328P, it works with the Arduino IDE and fits the Uno R3 footprint, so it is a straightforward choice if you want broad compatibility with shields, libraries and existing example sketches.One of the biggest improvements is the built-in Qwiic connector, which makes it easy to add compatible I2C sensors, actuators and other boards without soldering or extra shields. The board also breaks out SDA, SCL and IOREF for better R3 shield compatibility, and includes the extra analogue pins A6 and A7 for a bit more flexibility than a standard Uno-style board.USB-to-serial is handled by a CH340G over a reversible USB-C connector, and power can come from USB-C or the barrel jack. For mixed-voltage projects, SparkFun has added a switch to select 3.3V or 5V GPIO logic levels. There are also A4/A5 jumpers for disconnecting the logic level converters from the I2C pins, clearly labelled plated through-hole pads for more permanent wiring, and bottom-side D+/D- pads if you want to embed the board into a finished build.To get started, connect a USB-C cable, open the Arduino IDE, select Arduino UNO from the board menu, and upload your sketch. It is a solid option for prototyping, education, and projects that want classic Arduino compatibility with easier Qwiic expansion.Features:Arduino IDE support: Program over USB-C by selecting Arduino UNO from the board menuQwiic connectivity: Connect compatible I2C-based Qwiic products without soldering or shieldsUSB-C connector: Reversible USB-C connector with through hole anchoringSelectable GPIO voltage: Easily select the GPIO voltage between 3.3V or 5VUno R3 compatibility: SDA, SCL and IOREF are broken out on the Arduino Uno R3 footprint for future shield compatibilityA4/A5 jumpers: Can be used to disconnect the logic level converters from the pins tied directly to the I2C busPrototyping-friendly layout: Clearly labeled PTH holes alongside the standard female headersEmbedded USB access: Solder pads on the bottom of the board for USB data pins D+/D- allow an external USB connectionSpecifications:Microcontroller: ATmega328P microcontroller with Optiboot (UNO) BootloaderInput voltage: 7V to 15V via barrel jackInput voltage: 5V via USB-CVoltage regulators: LM1117 adjusted to 5VVoltage regulators: AP2112 for 3.3VPTC fuse: Built-in Resettable PTC Fuse 5V/2AUSB converter: CH340G Serial-to-USB ConverterLogic level switch: 3.3V to 5V Logic Level SwitchDigital I/O: 22x Digital I/O Pins (6x PWM Outputs, 8x Analog Inputs, 1x UART, 1x I2C, 1x SPI)Qwiic connector: 1x Qwiic ConnectorJumpers: A4/A5 JumpersISP header: 2x3 ISP HeaderFlash memory: 32kB Flash MemoryClock speed: 16MHz Clock SpeedConstruction: All SMD ConstructionShield compatibility: R3 Shield CompatibleReset button: Improved Reset ButtonIf you are already using the Qwiic ecosystem, this board makes a neat bridge between classic Arduino development and fast, solder-free I2C expansion.","vendor":"SparkFun","product_type":"Development Board","in_stock":true,"options":[],"variants":[{"id":15551,"title":"Default Title","sku":"SF-DEV-18158","mpn":"DEV-18158","price":56.45,"on_sale":false,"in_stock":true,"available_quantity":219}]}