OVERVIEW
The OSOYOO Breakout Board for Pro Micro is a circuit board designed for Pro Micro Board, it adds LED indicators for each GPIO port, so you can use the indicators to know the status of the pins and easily verify your prototype code without even wiring it up.
We have added a reverse power protection circuit. When the user connects the power incorrectly, the system will automatically shut down to prevent damage to the circuit board. In addition, this break board utilizes a 3-pin interface with V and GND pins on each pin for easy connection to sensor modules or SG90 servos.
With on-board screw terminals for seamless compatibility and a 5V/2A independent power supply providing extra power for servos and other sensors, these practical features make it easier to bring your great ideas to life.
Note：
Pro Micros are classified as 5V and 3.3V depending on the system voltage. The operating voltage of your Pro Micro determines the maximum allowable voltage on any of the I/O pins. For example, if you have a 3.3V Pro Micro, don’t interface it with something that outputs 5V.
Don’t forget which version you are using! Especially when using the red V-pin header, we need to distinguish between these two versions. If you’re not sure which version you have, check the back corner of the board. One of two boxes should be checked to indicate the operating voltage.
If you are using a compatible board, it is important to check the corresponding seller’s manual or directly use a multimeter to measure the corresponding pin voltage! Make sure that the jumper caps on the V_Selector are installed in the correct position when using the expansion board, otherwise there is a risk of damaging the IO ports or burning the chip or something more serious!
If you are using either the 3.3V version or the 5V version and are only using USB power, we recommend that you switch the jumper cap on the V selector to the USB_V side, and the red V pin will connect directly to the VCC pin on the Pro Micro. If you flip the jumper cap to the EXT5V side, the V pin will provide a maximum 5V/2A power output.
COMPATIBLE LIST
Note:
If you plan to power the board through the DC header or screw terminal port, please note that the RAW voltage for the Pro Micro board is 7-12V DC. If you are unsure about the RAW voltage range of your Pro Micro, we recommend using a voltage below 12V to avoid damaging the board or causing other risks.
FEATURES
- Standard pin interface to achieve full compatibility with the pitch Pro Micro and all Pro Micro compatible boards
- LED status indicators for all GPIOs,
- Independent LED, The status LED is driven by the chip instead of the GPIO so the GPIO will not be affected.
- Terminal block and header , connect to all GPIO headers of the Pro Micro boards, 2.54mm/0.1in pitch.
- Analog/Digital pinouts with 5V/GND
- Digital IO port 18 ports prepared to digital modules or servos
- Analog IO Port 9 ports prepared to analog sensor input
- External 5V/3.3V/GND power ports.
- Add an on-board reset button
- On-board power switch
- Anti-reverse power screw terminals
TECH SPECS
| Name |
OSOYOO Breakout Board for Pro Micro v.1.0 |
| Operating Voltage |
5V |
| Input Voltage (recommended) |
7-12V |
| Input Voltage (limit) |
7-16V |
| Digital I/O Pins |
18 |
| PWM Digital I/O Pins |
5 |
| Analog Input Pins |
9 |
| Power Switch |
Yes |
| External Power Output |
5V/2A |
| Options for power input |
USB/DC005–2.1/Screw terminal/Male pinheads |
| On-Board LED Indicators |
All GPIO ports |
| Length |
72 mm |
| Width |
54 mm |
| Weight |
25 g |
DIAGRAM
- Pro Micro board connector: Please pay attention to the orientation of the Pro Micro board when using it. Inserting it incorrectly or misaligning
- LED indicators: LED on if GPIO outputs/inputs high level, LED off if GPIO outputs/inputs low level.
- 2.54mm pitch pinheads: The S terminal directly connects to the Pro Micro board, it comes with V pins and GND pins for easy connection to sensors or servos.
- Screw terminal: Connect to all GPIO headers of the Pro Micro boards, 2.54mm/0.1in pitch
- XL1509 chip: DC/DC converter, it supports a maximum output power of 5V/2A.
- V selector:The jumper cap is factory default installed on the “VUSB” side, which means that the V pin on the I/O board is connected to the VCC pin on the Pro Micro board, which is suitable for scenarios where power is supplied via USBIf the jumper cap is on the “EXT5V” side and you use an external DC power supply via the DC connector or screw terminals, the V pin on the expansion board can provide up to 5V/2A power. (If you are using the 3.3V version of the Pro Micro board, note that the operating voltage of the Pro Micro determines the maximum allowable voltage on any I/O pin. For example, if you have a 3.3V Pro Micro, do not connect it to a device that outputs 5V.)
- Power Indicator
- Power switch
- Power terminal block: We recommend using a 7-12V DC power supply.
- DC005-2.1 socket: We recommend using a 7-12V DC power supply.
- External power out pinheads: It also provides additional power connections, EXT5V power depending on how it is supplied and the location of the jumper cap on the V selector, and VCC power from the Pro Micro board.
- SI2302 chip: N-Channel MOSFET, here we use it in a power supply screw terminal anti-reverse circuit
- 74HC04 chips: It is a hex inverter. We use it to connect each I/O port to control the corresponding indicator.
- RST Button: Press it will reset the process.
Note
We need to distinguish between the voltage versions used by the Pro Micro, 5V or 3.3V!
Do not use both the DC header and screw terminal ports for power supply, this will risk damaging the circuit board and burning out the power supply.
ASSEMBLY
When inserting, please pay attention to the boards‘ orientation，ensure the Pro Micro board is correctly connected before applying power to the power supply interface to avoid damaging the board due to misalignment.
(The Pro Micro board is not included in this product, you will need to bring your own or buy it directly from our website.)
Fritzing Part file download link:
https://osoyoo.com/driver/OSOYOO_Breakout_Board_for_ProMicro/2024009800-Pro-Micro-IO.svg
DIMENSIONS
DOCUMENTS
Thanks for checking out our OSOYOO Breakout board of Pro Micro instruction! If you’re looking for more resources related to these boards, here are some links:
Hopefully now you’re fully prepared to begin using the OSOYOO Breakout board of Pro Micro in a project of your own.
If you have any problems or difficulties using this product, please contact us for quick and free technical.
