Arduino Forum

Development => Other Hardware Development => Topic started by: ardy on Sep 03, 2017, 09:02 am

Title: Arduino Nano Expansion Board
Post by: ardy on Sep 03, 2017, 09:02 am
I have one of these Arduino Nano expansion boards.

(https://forum.arduino.cc/index.php?action=dlattach;topic=498217.0;attach=224627)

Does anyone have a schematic for these?

The board has a 3.3 volt regulator. How is it connected to Nano?

Thanks.
Title: Re: Arduino Nano Expansion Board
Post by: Whandall on Sep 03, 2017, 11:19 am
I think it only sources the extra 3.3V connectors.

(http://forum.arduino.cc/index.php?action=dlattach;topic=498217.0;attach=224635)

PDF (http://tinkbox.ph/sites/tinkbox.ph/files/downloads/Keyes%20-%20Funduino%20Uno%20and%20Nano%20Multi%20Purpose%20Shield%20V3.pdf)
Title: Re: Arduino Nano Expansion Board
Post by: ardy on Sep 03, 2017, 11:59 am
Ok. So the DC jack goes straight to the Nano's Vin pin then?
Title: Re: Arduino Nano Expansion Board
Post by: Whandall on Sep 03, 2017, 12:04 pm
If straight means via a diode and buffered by capacitors, yes.
Title: Re: Arduino Nano Expansion Board
Post by: ardy on Sep 03, 2017, 12:20 pm
I think I actually found a schematic for this type of board.

http://elecfreaks.com/store/download/datasheet/shield/NANO_pro_Shield.pdf (http://elecfreaks.com/store/download/datasheet/shield/NANO_pro_Shield.pdf)

According to it, the power goes from the shield to the Nano, then returns back to the shield as VCC (5V), before being downregulated to 3.3V. Is it your understanding too?

I think it would better if the shield converted DC to 3.3V directly, without having to go through the Nano first.
Title: Re: Arduino Nano Expansion Board
Post by: Whandall on Sep 03, 2017, 12:27 pm
Then maybe you would prefer a Nano IO shield (wich has a NRF24L01 and XBEE Bluetooth socket)

https://www.itead.cc/wiki/Arduino_Nano_IO_shield (https://www.itead.cc/wiki/Arduino_Nano_IO_shield)
Title: Re: Arduino Nano Expansion Board
Post by: ardy on Sep 03, 2017, 12:40 pm
That is a nice board, but pricier, and kind of a waste of real estate if I don't need RF.
Title: Re: Arduino Nano Expansion Board
Post by: Whandall on Sep 03, 2017, 12:43 pm
The last I bought was €1.92 with free shipping.

Nano-328P-IO-wireless-sensor-expansion-board-for-XBEE-and-NRF24L01-Socket-for-arduino (https://de.aliexpress.com/item/Nano-328P-IO-wireless-sensor-expansion-board-for-XBEE-and-NRF24L01-Socket-for-arduino/32662049632.html?spm=a2g0s.9042311.0.0.IbUwnn)
Title: Re: Arduino Nano Expansion Board
Post by: dupreejr on Jan 23, 2018, 09:27 am
I have one of these and I can not get is to run servo motors. Does anyone know how?
Title: Re: Arduino Nano Expansion Board
Post by: sobellinni on May 03, 2019, 01:38 am
The basic problem with this board is that the servo V+ is connected with the output of the Nano board regulator.  for example if you have a 6 volt battery the nano 5 volt power comes  from a small three terminal regulator that can't handle the servo current needs. 


Thus you need to rework the board to run the servos directly from the Battery 
Title: Re: Arduino Nano Expansion Board
Post by: deathorion on Dec 26, 2019, 07:19 pm
Hello guys, new to arduino here. Does anyone know if you can connect 5V regulated to power (input) a nano connected to this board? Do I just peak one of the 5V connections on the board and hope it works?