Thank you for using Batuino.
Batuino series products are derived from Arduino Uno and therefore they share programming tools, specifications of input/output pins and microcontroller. Hence you can refer to Arduino’s Getting Started guide, tutorials, and examples when using Batuino. However, it is very important to understand Batuino’s power source management features before starting using Batuino. Please note that, unlike other Batuino boards, Batuino-Brick has no power options. It was omitted in order to make it simple to use, rather than giving flexibility. Thus Batuino-Brick users can skip this guide.
Linked below is a descriptive document for both Batuino-Core and Batuino-BT. Just for reference.
Choosing power source
Let’s start powering up Batuino-Core or Batuino-BT. We will call Batuino-Core or Batuino-BT as Batuino hereafter in this guide.
At first, choose a power source which will be connected to Batuino. You can ‘connect’ more than one source at the same time to Batuino, but the only combination of power sources from which Batuino can actually draw current simultaneously is rechargeable Li-ion/LiPo battery and USB port.
Applicable power sources are:
- Non-rechargeable battery (any type, voltage within 1.2 to 6.0V)
- DC power supply (any type, voltage within 1.2 to 6.0 Volts)
- Rechargeable Li-ion or Li-ion polymer (LiPo) battery with nominal voltage of 3.7V and maximum allowable voltage no less than 4.2V. Do not use serially connected battery pack (usually having 7.4V or more). Make sure that the capacity of the battery should be larger than 1,500mAh to ensure safety during charging, because the maximum charge current can reach up to 1.3A.
- USB port (yes, all USB ports provide 5.0V)
According to the power source(s) you chosen, put a shunt jumper on proper position in power source selection header on Batuino. When you put the shunt jumper on BAT1 position of the power source selection header, then you can power up Batuino from non-rechargeable battery or DC power supply. On the other hand, you can use rechargeable Li-ion/LiPo battery and/or USB port when the shunt jumper is put on BAT2 position. Please refer to the following table to figure out which position the shunt jumper should be put on.
|Power source type||Shunt jumper position|
|DC power supply||✓|
|Rechargeable Li-ion (polymer) battery||✓|
The power source selection header has 3 pins, and it is located at the lower left corner when you look at Batuino board with text ‘Batuino…’ upright. Power source selection header is marked as J4 in Batuino-Core and J5 for Batuino-BT. Please check the following pictures to locate the header properly. (In red squares on the pictures.) Actually, you will get Batuino board with the power source selection header already populated with a shunt jumper in BAT2 position by default. You will need to change it if you are willing to use non-rechargeable battery or DC power supply.
After putting a shunt jumper on the right position in power source selection header, then we will select the output voltage level which will be provided at VOUT pin of Batuino.
Choosing VOUT voltage level
Batuino boosts voltage from input source to higher voltage. The output voltage level can be set to 6V or 9V, according to the position of a shunt jumper put on VOUT voltage selection header. Please refer to the following pictures to figure out where the header is located. (J3 for Batuino-Core, J2 for Batuino-BT.) If you put the shunt jumper on 6V position then VOUT will be 6V, and if you put on 9V position then VOUT will be 9V. Please keep in mind that the default level of VOUT is 9V, so even if you do not put a shunt jumper, VOUT will still provide 9V output.
Connecting power source
Let’s connect power source to Batuino. You should connect the power source to BAT1 or BAT2 pin properly according to the type of power source. Power source pins are BAT1 and BAT2 and they can be found at the lower right corner of Batuino board when you hold Batuino while seeing ‘Batuino…’ text upright.
- Non-rechargeable battery
- Connect cathode (+) of battery to BAT1 pin.
- Connect anode (-) of battery to GND pin. All GND pins of Batuino board are connected internally, so you can use any of them.
- DC power supply
- Connect cathode (+) of DC power supply to BAT1 pin.
- Connect anode (-) of DC power supply to GND pin. All GND pins of Batuino board are connected internally, so you can use any of them.
- Rechargeable Li-ion/LiPo battery
- Connect cathode (+) of Li-ion battery to BAT2 pin.
- Connect anode (-) of Li-ion battery to GND pin. All GND pins of Batuino board are connected internally, so you can use any of them.
- USB port
- Plug in micro USB B connector.
Turning on Batuino
Power switch of Batuino can be found at the left edge when you hold Batuino while seeing ‘Batuino…’ text upright.
To turn on, slide the switch to ‘ON’ position. Then a blue LED will be lit on. This indicated that Batuino is in operation and all output voltages are available. To power off, slide the switch to ‘OFF’ position.
Comments about power sources
When BAT2 is selected as a power source by putting a shunt jumper on BAT2 position of power source selection header, Batuino can also be powered from USB. Batuino automatically adjusts the currents from/to battery and from USB port according to the load current required. When USB port is connected, Batuino starts charging the rechargeable battery connected to BAT2 pin. However, if current load is very high, both USB and rechargeable battery are used as current sources and therefore the battery will not be charged.
Green LED is lit when the rechargeable battery is being charged. If battery voltage is lower than 3.5V, red LED is lit.
Please note that when BAT1 is selected as a power source by putting a shunt jumper on BAT1 position of J4, Batuino cannot be powered from USB.
FTDI virtual COM port driver installation (if required)
After connecting Batuino to PC via USB cable, a COM port will be added automatically under fairly recent version of Microsoft Windows. You can check it from Arduino IDE (Tools -> Port). Select the available port in list if this port is not selected yet. If there is multiple ports, you should select the correct one which belongs to Batuino. You can check whether it is for Batuino or not by unplugging Batuino and then check the existence of the port. If the port belongs to Batuino, it will disappear when you pull out the USB cable from Batuino.
However, if the COM port is not recognized automatically, please install FTDI virtual COM port driver. Batuino uses FTDI’s FT231X as a USB-to-UART IC. Please visit the web page linked below and download appropriate one according to your operation system.