ArduinoGeneral

How to power Girl Board from 9v

userHead agent-j.ru 2014-05-26 07:03:57 3055 Views5 Replies
It says here "Input Voltage limits: 6.5-12V"
[url=http://www.dfrobot.com/index.php?route=product/product&product_id=1049]http://www.dfrobot.com/index.php?route=product/product&product_id=1049[/url]

What are the contacts I have to connect voltage (not USB)?
2014-05-28 16:51:33 Hello,
Your schematic looks right. There is no Vin port on the board, it is 5V.
How do you want to connect power chip to the girl board? With a breadboard?
userHeadPic Grey.CC
2014-05-28 01:12:51 Because of your mistake give me an answer (advice)

I have GirlBoard, 7.2V battery and a pump.
Is my scheme right?

[img]

* "Motor out Terminal" is for pump [url=http://www.dfrobot.com/index.php?route=product/product&filter_name=pump&product_id=667]http://www.dfrobot.com/index.php?route=product/product&filter_name=pump&product_id=667[/url]
* Voltage Regulator is [b]L7805[/b]
userHeadPic agent-j.ru
2014-05-27 10:47:54 Yeah, there is a little mistake.
After seeing your post, we have checked the schematic. The specification is not very suitable, especially the power supply. I am sorry for the carelessness.
What is your problem?
It is better to power the board from the USB port. But if you want to support it from "+5V" and "GND" port, you must make sure the power supply is no higher than 5v, or it will damage the MCU. As what you said, [quote]I have to use DC-DC buck converter[/quote], you could try this connection, but please care about the output voltage.
userHeadPic Grey.CC
2014-05-26 21:49:26 [quote="Grey"]
Hello, agent-j.ru

The operating voltage is 5V, you could power it from the usb directly.

It is OK.
[/quote]
I see that GirlBoard description was changed today. The description was wrong?
Because of this I'm having some problems and I have to use DC-DC buck converter
userHeadPic agent-j.ru
2014-05-26 10:53:02 Hello, agent-j.ru

The operating voltage is 5V, you could power it from the usb directly.

It is OK.
userHeadPic Grey.CC