Emartuino With Atmega328 -USB( Boarduino Clone)

If you've ever struggled to use a solderless breadboard with an Arduino, you understand how frustrating it can be! I designed this Arduino clone to solve this problem in an inexpensive DIY fashion.

The Boarduino is an Arduino clone: when programmed with the Arduino bootloader, it can talk to the Arduino software and run sketches just like the original.

There are noticable differences between the Boarduino and the Arduino.

    * Shields cannot be used as the form factor is so different
    * There are two versions, a DC version and a USB version
      For the DC version there isn't an on-board USB chip. This means you need to use a USB-TTL  or a MiniUSB  (or any other FTDI breakout board) which is not included. There are also no rx/tx LEDs and no rx/tx 1K series resistors.
      For the USB version, there is an on-board USB chip but there isn't a DC jack or 5V regulator, you can power it through the USB jack. There is a rx 1K resistor so you can use this to talk to serial accessories.
    * 16.00 MHz ceramic resonator is used instead of crystal, so cycle speed may be off by +- 0.3nS (0.5%). This isn't relevant for UART timing, servo drivers, PWM, etc. but could be an issue if you need nanosecond-precision timing. Note that the Arduino software only provides millisecond-precision timing for general sketches (1 second = 1000ms. 1ms = 1,000,000 ns)

The specifications for the DC boarduino include:



    * Designed to plug into a breadboard for easy prototyping
    * Petite size, only 3" x 0.8" (75mm x 20mm)
    * All 'standard' pins are brought out - Digital 0 thru 13, Analog 0 thru 5, ARef, 5V, Ground, Vin and Reset
    * 2 LEDs, green power and red "pin 13" LED just like the Arduino Diecimila
    * Standard Reset button
    * Atmega328 chip has twice as much storage, runs at 16.00 MHz, just like the latest Arduino. Upload baud rate is 57600, use Arduino IDE v13+ (note that the product photo above hasn't been updated)
    * 6-pin standard ICSP header
    * Standard 2.1mm DC jack (just like the original Arduino) with 5V regulator to run on 7V-17V power (DC)
    * USB or External power, selectable with a jumper (just like original Arduino)
    * 1N4001 diode protects against using incorrect wall adapter
    * 6-pin header at the end for a USB-TTL 
    * Auto-reset capability when used with a USB-TTL 
    * Available as a low cost kit with standard parts, so its never out of stock
    * All through-hole parts are easy to solder

The specifications for the USB boarduino include:
    * Designed to plug into a breadboard for easy prototyping
    * Petite size, only 2.75 " x 0.8" (75mm x 20mm)
    * All 'standard' pins are brought out - Digital 0 thru 13, Analog 0 thru 5, ARef, 5V, Ground, 3.3V and Reset
    * 2 LEDs, green power and red "pin 13" LED just like the Arduino Diecimila
    * Standard Reset button
    * 6-pin standard ICSP header
    * Standard USB jack
    * Atmega328 chip has twice as much storage, runs at 16.00 MHz, just like the latest Arduino. Upload baud rate is 57600, use Arduino IDE v13+ (note that the product photo above hasn't been updated)
    * USB or external power, selectable with a jumper
    * 500mA fuse protects your computer from current overdraw
    * Auto-reset capability
    * Available as a low cost kit with standard parts, so its never out of stock
    * All through-hole parts are easy to solder - SMT chip is presoldered & tested when purchased as a kit