InHaos Buono Lite R3


InHaos Buono Lite R3

The InHaos Buono Uno Lite R3 is very similar to the InHaos Buono Uno R3, having been improved from the Arduino Uno R3. The power supply can be switched between 3.3V and 5V, and is capable of 1.8A output for powering greedy peripherals. There is a low-pass filter on AVcc, which helps get stable and accurate readings from the analog inputs. There is a ground terminal that you can clip a lead to for test measurements. A6 and A7 analog inputs are on the board on a separate header location (header not included).

InHaos Buono Uno Lite R3.
Figure 1.
InHaos Buono Uno Lite R3

The difference between the Buono Uno R3 and the Buono Uno Lite R3 is in the host interface. The Lite has a serial TTL connection, and is a bit cheaper than the Buono Uno R3, at around $8.00 delivered. The serial connection is the same pinout as the Arduino Pro, and Arduino Pro Mini, but the gender is backwards. If you use an FTDI cable or compatible, with a female connector, you will need to use a male header between the female connector on the board and the one on the cable. That problem aside, it appears to work with any cable - 5V or 3.3V, on either power supply setting.

After using it for a few days, we see an area where it could be improved. There could be a 2-pin header for power, in addition to, or instead of the regular power jack. We don't say that because there is anything wrong with the power connector, but because this board would be even better with an option like that. We typically don't want USB on an imbedded application, and for the same reason, we like a 2-pin power connector, since wall warts are not typically found inside an application's enclosure. Also, a DIP packaged ATmega328 would make it easier to use for development. We get a little queasy mistreating an SMD microcontroller. But for $8.00, we can buy an extra.

InHaos Buono Lite R3
MCU ATmega328
DigitalPins 14
Analog Inputs 8
Analog Outputs 0
Operating Voltage 3.3 / 5
Operating Frequency 16MHz
3.3V Output 300mA
Test Current Draw18.5mA@5V 15mA@3.3V
Web Site InHaos
  1. Information from manufacturers and other sources.
  2. Test current from sketch that exercises I2C, SPI, and analog pins.
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